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spec/util_promise_spec.lua @ 13104:8c786880e28d
mod_admin_shell: Allow logging global events with debug:logevents("*")
Missing feature. It should behave like debug:events()
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 14 May 2023 19:01:01 +0200 |
parent | 12752:9ef8f248635c |
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1 local promise = require "util.promise"; |
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2 |
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3 describe("util.promise", function () |
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4 --luacheck: ignore 212/resolve 212/reject |
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5 describe("new()", function () |
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6 it("returns a promise object", function () |
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7 assert(promise.new()); |
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8 end); |
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9 end); |
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10 it("supplies a sensible tostring()", function () |
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11 local s = tostring(promise.new()); |
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12 assert.truthy(s:find("promise", 1, true)); |
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13 assert.truthy(s:find("pending", 1, true)); |
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14 end); |
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15 it("notifies immediately for fulfilled promises", function () |
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16 local p = promise.new(function (resolve) |
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17 resolve("foo"); |
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18 end); |
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19 local cb = spy.new(function (v) |
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20 assert.equal("foo", v); |
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21 end); |
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22 p:next(cb); |
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23 assert.spy(cb).was_called(1); |
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24 end); |
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25 it("notifies on fulfillment of pending promises", function () |
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26 local r; |
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27 local p = promise.new(function (resolve) |
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28 r = resolve; |
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29 end); |
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30 local cb = spy.new(function (v) |
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31 assert.equal("foo", v); |
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32 end); |
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33 p:next(cb); |
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34 assert.spy(cb).was_called(0); |
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35 r("foo"); |
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36 assert.spy(cb).was_called(1); |
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37 end); |
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38 it("ignores resolve/reject of settled promises", function () |
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39 local res, rej; |
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40 local p = promise.new(function (resolve, reject) |
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41 res, rej = resolve, reject; |
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42 end); |
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43 local cb = spy.new(function (v) |
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44 assert.equal("foo", v); |
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45 end); |
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46 p:next(cb, cb); |
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47 assert.spy(cb).was_called(0); |
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48 res("foo"); |
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49 assert.spy(cb).was_called(1); |
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50 rej("bar"); |
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51 assert.spy(cb).was_called(1); |
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52 rej(promise.resolve("bar")); |
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53 assert.spy(cb).was_called(1); |
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54 res(promise.reject("bar")); |
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55 assert.spy(cb).was_called(1); |
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56 res(promise.resolve("bar")); |
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57 assert.spy(cb).was_called(1); |
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58 end); |
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59 it("allows chaining :next() calls", function () |
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60 local r; |
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61 local result; |
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62 local p = promise.new(function (resolve) |
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63 r = resolve; |
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64 end); |
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65 local cb1 = spy.new(function (v) |
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66 assert.equal("foo", v); |
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67 return "bar"; |
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68 end); |
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69 local cb2 = spy.new(function (v) |
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70 assert.equal("bar", v); |
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71 result = v; |
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72 end); |
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73 p:next(cb1):next(cb2); |
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74 assert.spy(cb1).was_called(0); |
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75 assert.spy(cb2).was_called(0); |
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76 r("foo"); |
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77 assert.spy(cb1).was_called(1); |
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78 assert.spy(cb2).was_called(1); |
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79 assert.equal("bar", result); |
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80 end); |
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81 it("supports multiple :next() calls on the same promise", function () |
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82 local r; |
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83 local result; |
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84 local p = promise.new(function (resolve) |
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85 r = resolve; |
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86 end); |
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87 local cb1 = spy.new(function (v) |
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88 assert.equal("foo", v); |
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89 result = v; |
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90 end); |
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91 local cb2 = spy.new(function (v) |
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92 assert.equal("foo", v); |
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93 result = v; |
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94 end); |
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95 p:next(cb1); |
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96 p:next(cb2); |
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97 assert.spy(cb1).was_called(0); |
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98 assert.spy(cb2).was_called(0); |
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99 r("foo"); |
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100 assert.spy(cb1).was_called(1); |
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101 assert.spy(cb2).was_called(1); |
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102 assert.equal("foo", result); |
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103 end); |
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104 it("automatically rejects on error", function () |
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105 local r; |
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106 local p = promise.new(function (resolve) |
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107 r = resolve; |
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108 error("oh no"); |
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109 end); |
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110 local cb = spy.new(function () end); |
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111 local err_cb = spy.new(function (v) |
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112 assert.equal("oh no", v); |
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113 end); |
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114 p:next(cb, err_cb); |
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115 assert.spy(cb).was_called(0); |
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116 assert.spy(err_cb).was_called(1); |
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117 r("foo"); |
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118 assert.spy(cb).was_called(0); |
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119 assert.spy(err_cb).was_called(1); |
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120 end); |
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121 it("supports reject()", function () |
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122 local r, result; |
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123 local p = promise.new(function (resolve, reject) |
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124 r = reject; |
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125 end); |
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126 local cb = spy.new(function () end); |
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127 local err_cb = spy.new(function (v) |
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128 result = v; |
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129 assert.equal("oh doh", v); |
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130 end); |
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131 p:next(cb, err_cb); |
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132 assert.spy(cb).was_called(0); |
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133 assert.spy(err_cb).was_called(0); |
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134 r("oh doh"); |
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135 assert.spy(cb).was_called(0); |
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136 assert.spy(err_cb).was_called(1); |
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137 assert.equal("oh doh", result); |
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138 end); |
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139 it("supports chaining of rejected promises", function () |
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140 local r, result; |
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141 local p = promise.new(function (resolve, reject) |
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142 r = reject; |
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143 end); |
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144 local cb = spy.new(function () end); |
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145 local err_cb = spy.new(function (v) |
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146 result = v; |
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147 assert.equal("oh doh", v); |
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148 return "ok" |
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149 end); |
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150 local cb2 = spy.new(function (v) |
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151 result = v; |
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152 end); |
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153 local err_cb2 = spy.new(function () end); |
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154 p:next(cb, err_cb):next(cb2, err_cb2) |
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155 assert.spy(cb).was_called(0); |
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156 assert.spy(err_cb).was_called(0); |
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157 assert.spy(cb2).was_called(0); |
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158 assert.spy(err_cb2).was_called(0); |
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159 r("oh doh"); |
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160 assert.spy(cb).was_called(0); |
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161 assert.spy(err_cb).was_called(1); |
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162 assert.spy(cb2).was_called(1); |
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163 assert.spy(err_cb2).was_called(0); |
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164 assert.equal("ok", result); |
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165 end); |
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166 |
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167 it("propagates errors down the chain, even when some handlers are not provided", function () |
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168 local r, result; |
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169 local test_error = {}; |
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170 local p = promise.new(function (resolve, reject) |
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171 r = reject; |
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172 end); |
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173 local cb = spy.new(function () end); |
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174 local err_cb = spy.new(function (e) result = e end); |
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175 local p2 = p:next(function () error(test_error) end); |
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176 local p3 = p2:next(cb) |
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177 p3:catch(err_cb); |
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178 assert.spy(cb).was_called(0); |
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179 assert.spy(err_cb).was_called(0); |
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180 r("oh doh"); |
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181 assert.spy(cb).was_called(0); |
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182 assert.spy(err_cb).was_called(1); |
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183 assert.spy(err_cb).was_called_with("oh doh"); |
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184 assert.equal("oh doh", result); |
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185 end); |
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186 |
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187 it("propagates values down the chain, even when some handlers are not provided", function () |
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188 local r; |
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189 local p = promise.new(function (resolve, reject) |
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190 r = resolve; |
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191 end); |
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192 local cb = spy.new(function () end); |
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193 local err_cb = spy.new(function () end); |
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194 local p2 = p:next(function (v) return v; end); |
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195 local p3 = p2:catch(err_cb) |
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196 p3:next(cb); |
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197 assert.spy(cb).was_called(0); |
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198 assert.spy(err_cb).was_called(0); |
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199 r(1337); |
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200 assert.spy(cb).was_called(1); |
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201 assert.spy(cb).was_called_with(1337); |
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202 assert.spy(err_cb).was_called(0); |
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203 end); |
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204 |
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205 it("fulfilled promises do not call error handlers and do propagate value", function () |
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206 local p = promise.resolve("foo"); |
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207 local cb = spy.new(function () end); |
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208 local p2 = p:catch(cb); |
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209 assert.spy(cb).was_called(0); |
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210 |
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211 local cb2 = spy.new(function () end); |
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212 p2:catch(cb2); |
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213 assert.spy(cb2).was_called(0); |
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214 end); |
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215 |
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216 it("rejected promises do not call fulfilled handlers and do propagate reason", function () |
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217 local p = promise.reject("foo"); |
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218 local cb = spy.new(function () end); |
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219 local p2 = p:next(cb); |
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220 assert.spy(cb).was_called(0); |
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221 |
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222 local cb2 = spy.new(function () end); |
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223 local cb2_err = spy.new(function () end); |
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224 p2:next(cb2, cb2_err); |
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225 assert.spy(cb2).was_called(0); |
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226 assert.spy(cb2_err).was_called(1); |
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227 assert.spy(cb2_err).was_called_with("foo"); |
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228 end); |
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229 |
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230 describe("allows callbacks to return", function () |
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231 it("pending promises", function () |
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232 local r; |
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233 local p = promise.resolve() |
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234 local cb = spy.new(function () |
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235 return promise.new(function (resolve) |
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236 r = resolve; |
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237 end); |
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238 end); |
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239 local cb2 = spy.new(function () end); |
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240 p:next(cb):next(cb2); |
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241 assert.spy(cb).was_called(1); |
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242 assert.spy(cb2).was_called(0); |
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243 r("hello"); |
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244 assert.spy(cb).was_called(1); |
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245 assert.spy(cb2).was_called(1); |
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246 assert.spy(cb2).was_called_with("hello"); |
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247 end); |
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248 |
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249 it("resolved promises", function () |
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250 local p = promise.resolve() |
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251 local cb = spy.new(function () |
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252 return promise.resolve("hello"); |
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253 end); |
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254 local cb2 = spy.new(function () end); |
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255 p:next(cb):next(cb2); |
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256 assert.spy(cb).was_called(1); |
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257 assert.spy(cb2).was_called(1); |
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258 assert.spy(cb2).was_called_with("hello"); |
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259 end); |
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260 |
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261 it("rejected promises", function () |
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262 local p = promise.resolve() |
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263 local cb = spy.new(function () |
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264 return promise.reject("hello"); |
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265 end); |
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266 local cb2 = spy.new(function () |
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267 return promise.reject("goodbye"); |
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268 end); |
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269 local cb3 = spy.new(function () end); |
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270 p:next(cb):catch(cb2):catch(cb3); |
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271 assert.spy(cb).was_called(1); |
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272 assert.spy(cb2).was_called(1); |
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273 assert.spy(cb2).was_called_with("hello"); |
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274 assert.spy(cb3).was_called(1); |
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275 assert.spy(cb3).was_called_with("goodbye"); |
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276 end); |
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277 |
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278 it("ordinary values", function () |
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279 local p = promise.resolve() |
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280 local cb = spy.new(function () |
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281 return "hello" |
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282 end); |
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283 local cb2 = spy.new(function () end); |
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284 p:next(cb):next(cb2); |
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285 assert.spy(cb).was_called(1); |
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286 assert.spy(cb2).was_called(1); |
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287 assert.spy(cb2).was_called_with("hello"); |
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288 end); |
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289 |
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290 it("nil", function () |
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291 local p = promise.resolve() |
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292 local cb = spy.new(function () |
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293 return |
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294 end); |
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295 local cb2 = spy.new(function () end); |
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296 p:next(cb):next(cb2); |
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297 assert.spy(cb).was_called(1); |
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298 assert.spy(cb2).was_called(1); |
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299 assert.spy(cb2).was_called_with(nil); |
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300 end); |
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301 end); |
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302 |
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303 describe("race()", function () |
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304 it("works with fulfilled promises", function () |
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305 local p1, p2 = promise.resolve("yep"), promise.resolve("nope"); |
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306 local p = promise.race({ p1, p2 }); |
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307 local result; |
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308 p:next(function (v) |
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309 result = v; |
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310 end); |
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311 assert.equal("yep", result); |
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312 end); |
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313 it("works with pending promises", function () |
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314 local r1, r2; |
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315 local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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316 local p = promise.race({ p1, p2 }); |
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317 |
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318 local result; |
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319 local cb = spy.new(function (v) |
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320 result = v; |
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321 end); |
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322 p:next(cb); |
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323 assert.spy(cb).was_called(0); |
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324 r2("yep"); |
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325 r1("nope"); |
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326 assert.spy(cb).was_called(1); |
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327 assert.equal("yep", result); |
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328 end); |
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329 end); |
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330 describe("all()", function () |
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331 it("works with fulfilled promises", function () |
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332 local p1, p2 = promise.resolve("yep"), promise.resolve("nope"); |
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333 local p = promise.all({ p1, p2 }); |
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334 local result; |
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335 p:next(function (v) |
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336 result = v; |
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337 end); |
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338 assert.same({ "yep", "nope" }, result); |
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339 end); |
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340 it("works with pending promises", function () |
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341 local r1, r2; |
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342 local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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343 local p = promise.all({ p1, p2 }); |
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344 |
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345 local result; |
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346 local cb = spy.new(function (v) |
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347 result = v; |
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348 end); |
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349 p:next(cb); |
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350 assert.spy(cb).was_called(0); |
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351 r2("yep"); |
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352 assert.spy(cb).was_called(0); |
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353 r1("nope"); |
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354 assert.spy(cb).was_called(1); |
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355 assert.same({ "nope", "yep" }, result); |
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356 end); |
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357 it("rejects if any promise rejects", function () |
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358 local r1, r2; |
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359 local p1 = promise.new(function (resolve, reject) r1 = reject end); |
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360 local p2 = promise.new(function (resolve, reject) r2 = reject end); |
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361 local p = promise.all({ p1, p2 }); |
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362 |
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363 local result; |
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364 local cb = spy.new(function (v) |
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365 result = v; |
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366 end); |
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367 local cb_err = spy.new(function (v) |
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368 result = v; |
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369 end); |
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370 p:next(cb, cb_err); |
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371 assert.spy(cb).was_called(0); |
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372 assert.spy(cb_err).was_called(0); |
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373 r2("fail"); |
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374 assert.spy(cb).was_called(0); |
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375 assert.spy(cb_err).was_called(1); |
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376 r1("nope"); |
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377 assert.spy(cb).was_called(0); |
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378 assert.spy(cb_err).was_called(1); |
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379 assert.equal("fail", result); |
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380 end); |
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381 it("works with non-numeric keys", function () |
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382 local r1, r2; |
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383 local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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384 local p = promise.all({ [true] = p1, [false] = p2 }); |
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385 |
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386 local result; |
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387 local cb = spy.new(function (v) |
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388 result = v; |
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389 end); |
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390 p:next(cb); |
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391 assert.spy(cb).was_called(0); |
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392 r2("yep"); |
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393 assert.spy(cb).was_called(0); |
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394 r1("nope"); |
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395 assert.spy(cb).was_called(1); |
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396 assert.same({ [true] = "nope", [false] = "yep" }, result); |
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397 end); |
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398 it("passes through non-promise values", function () |
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399 local r1; |
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400 local p1 = promise.new(function (resolve) r1 = resolve end); |
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401 local p = promise.all({ [true] = p1, [false] = "yep" }); |
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402 |
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403 local result; |
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404 local cb = spy.new(function (v) |
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405 result = v; |
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406 end); |
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407 p:next(cb); |
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408 assert.spy(cb).was_called(0); |
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409 r1("nope"); |
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410 assert.spy(cb).was_called(1); |
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411 assert.same({ [true] = "nope", [false] = "yep" }, result); |
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412 end); |
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413 end); |
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414 describe("all_settled()", function () |
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415 it("works with fulfilled promises", function () |
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416 local p1, p2 = promise.resolve("yep"), promise.resolve("nope"); |
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417 local p = promise.all_settled({ p1, p2 }); |
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418 local result; |
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419 p:next(function (v) |
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420 result = v; |
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421 end); |
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422 assert.same({ |
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423 { status = "fulfilled", value = "yep" }; |
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424 { status = "fulfilled", value = "nope" }; |
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425 }, result); |
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426 end); |
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427 it("works with pending promises", function () |
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428 local r1, r2; |
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429 local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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430 local p = promise.all_settled({ p1, p2 }); |
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431 |
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432 local result; |
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433 local cb = spy.new(function (v) |
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434 result = v; |
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435 end); |
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436 p:next(cb); |
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437 assert.spy(cb).was_called(0); |
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438 r2("yep"); |
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439 assert.spy(cb).was_called(0); |
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440 r1("nope"); |
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441 assert.spy(cb).was_called(1); |
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442 assert.same({ |
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443 { status = "fulfilled", value = "nope" }; |
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444 { status = "fulfilled", value = "yep" }; |
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445 }, result); |
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446 end); |
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447 it("works when some promises reject", function () |
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448 local r1, r2; |
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449 local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (_, reject) r2 = reject end); |
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450 local p = promise.all_settled({ p1, p2 }); |
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451 |
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452 local result; |
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453 local cb = spy.new(function (v) |
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454 result = v; |
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455 end); |
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456 p:next(cb); |
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457 assert.spy(cb).was_called(0); |
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458 r2("this fails"); |
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459 assert.spy(cb).was_called(0); |
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460 r1("this succeeds"); |
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461 assert.spy(cb).was_called(1); |
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462 assert.same({ |
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463 { status = "fulfilled", value = "this succeeds" }; |
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464 { status = "rejected", reason = "this fails" }; |
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465 }, result); |
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466 end); |
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467 it("works when all promises reject", function () |
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468 local r1, r2; |
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469 local p1, p2 = promise.new(function (_, reject) r1 = reject end), promise.new(function (_, reject) r2 = reject end); |
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470 local p = promise.all_settled({ p1, p2 }); |
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471 |
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472 local result; |
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473 local cb = spy.new(function (v) |
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474 result = v; |
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475 end); |
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476 p:next(cb); |
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477 assert.spy(cb).was_called(0); |
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478 r2("this fails"); |
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479 assert.spy(cb).was_called(0); |
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480 r1("this fails too"); |
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481 assert.spy(cb).was_called(1); |
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482 assert.same({ |
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483 { status = "rejected", reason = "this fails too" }; |
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484 { status = "rejected", reason = "this fails" }; |
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485 }, result); |
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486 end); |
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487 it("works with non-numeric keys", function () |
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488 local r1, r2; |
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489 local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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490 local p = promise.all_settled({ foo = p1, bar = p2 }); |
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491 |
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492 local result; |
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493 local cb = spy.new(function (v) |
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494 result = v; |
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495 end); |
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496 p:next(cb); |
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497 assert.spy(cb).was_called(0); |
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498 r2("yep"); |
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499 assert.spy(cb).was_called(0); |
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500 r1("nope"); |
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501 assert.spy(cb).was_called(1); |
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502 assert.same({ |
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503 foo = { status = "fulfilled", value = "nope" }; |
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504 bar = { status = "fulfilled", value = "yep" }; |
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505 }, result); |
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506 end); |
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507 it("passes through non-promise values", function () |
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508 local r1; |
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509 local p1 = promise.new(function (resolve) r1 = resolve end); |
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510 local p = promise.all_settled({ foo = p1, bar = "yep" }); |
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511 |
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512 local result; |
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513 local cb = spy.new(function (v) |
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514 result = v; |
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515 end); |
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516 p:next(cb); |
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517 assert.spy(cb).was_called(0); |
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518 r1("nope"); |
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519 assert.spy(cb).was_called(1); |
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520 assert.same({ |
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521 foo = { status = "fulfilled", value = "nope" }; |
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522 bar = "yep"; |
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523 }, result); |
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524 end); |
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525 end); |
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526 describe("catch()", function () |
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527 it("works", function () |
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528 local result; |
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529 local p = promise.new(function (resolve) |
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530 error({ foo = true }); |
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531 end); |
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532 local cb1 = spy.new(function (v) |
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533 result = v; |
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534 end); |
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535 assert.spy(cb1).was_called(0); |
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536 p:catch(cb1); |
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537 assert.spy(cb1).was_called(1); |
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538 assert.same({ foo = true }, result); |
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539 end); |
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540 end); |
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541 describe("join()", function () |
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542 it("works", function () |
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543 local r1, r2; |
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544 local res1, res2; |
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545 local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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546 |
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547 local p = promise.join(function (_res1, _res2) |
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548 res1, res2 = _res1, _res2; |
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549 return promise.resolve("works"); |
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550 end, p1, p2); |
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551 |
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552 local result; |
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553 local cb = spy.new(function (v) |
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554 result = v; |
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555 end); |
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556 p:next(cb); |
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557 assert.spy(cb).was_called(0); |
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558 r2("yep"); |
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559 assert.spy(cb).was_called(0); |
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560 r1("nope"); |
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561 assert.spy(cb).was_called(1); |
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562 assert.same("works", result); |
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563 assert.equals("nope", res1); |
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564 assert.equals("yep", res2); |
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565 end); |
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566 end); |
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567 it("promises may be resolved by other promises", function () |
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568 local r1, r2; |
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569 local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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570 |
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571 local result; |
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572 local cb = spy.new(function (v) |
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573 result = v; |
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574 end); |
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575 p1:next(cb); |
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576 assert.spy(cb).was_called(0); |
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577 |
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578 r1(p2); |
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579 assert.spy(cb).was_called(0); |
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580 r2("yep"); |
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581 assert.spy(cb).was_called(1); |
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582 assert.equal("yep", result); |
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583 end); |
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584 describe("reject()", function () |
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585 it("returns a rejected promise", function () |
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586 local p = promise.reject("foo"); |
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587 local cb = spy.new(function () end); |
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588 p:catch(cb); |
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589 assert.spy(cb).was_called(1); |
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590 assert.spy(cb).was_called_with("foo"); |
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591 end); |
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592 it("returns a rejected promise and does not call on_fulfilled", function () |
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593 local p = promise.reject("foo"); |
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594 local cb = spy.new(function () end); |
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595 p:next(cb); |
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596 assert.spy(cb).was_called(0); |
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597 end); |
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598 end); |
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599 describe("finally()", function () |
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600 local p, p2, resolve, reject, on_finally; |
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601 before_each(function () |
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602 p = promise.new(function (_resolve, _reject) |
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603 resolve, reject = _resolve, _reject; |
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604 end); |
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605 on_finally = spy.new(function () end); |
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606 p2 = p:finally(on_finally); |
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607 end); |
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608 it("runs when a promise is resolved", function () |
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609 assert.spy(on_finally).was_called(0); |
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610 resolve("foo"); |
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611 assert.spy(on_finally).was_called(1); |
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612 assert.spy(on_finally).was_not_called_with("foo"); |
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613 end); |
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614 it("runs when a promise is rejected", function () |
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615 assert.spy(on_finally).was_called(0); |
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616 reject("foo"); |
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617 assert.spy(on_finally).was_called(1); |
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618 assert.spy(on_finally).was_not_called_with("foo"); |
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619 end); |
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620 it("returns a promise that fulfills with the original value", function () |
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621 local cb2 = spy.new(function () end); |
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622 p2:next(cb2); |
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623 assert.spy(on_finally).was_called(0); |
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624 assert.spy(cb2).was_called(0); |
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625 resolve("foo"); |
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626 assert.spy(on_finally).was_called(1); |
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627 assert.spy(cb2).was_called(1); |
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628 assert.spy(on_finally).was_not_called_with("foo"); |
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629 assert.spy(cb2).was_called_with("foo"); |
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630 end); |
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631 it("returns a promise that rejects with the original error", function () |
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632 local on_finally_err = spy.new(function () end); |
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633 local on_finally_ok = spy.new(function () end); |
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634 p2:catch(on_finally_err); |
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635 p2:next(on_finally_ok); |
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636 assert.spy(on_finally).was_called(0); |
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637 assert.spy(on_finally_err).was_called(0); |
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638 reject("foo"); |
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639 assert.spy(on_finally).was_called(1); |
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640 -- Since the original promise was rejected, the finally promise should also be |
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641 assert.spy(on_finally_ok).was_called(0); |
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642 assert.spy(on_finally_err).was_called(1); |
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643 assert.spy(on_finally).was_not_called_with("foo"); |
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644 assert.spy(on_finally_err).was_called_with("foo"); |
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645 end); |
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646 it("returns a promise that rejects with an uncaught error inside on_finally", function () |
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647 p = promise.new(function (_resolve, _reject) |
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648 resolve, reject = _resolve, _reject; |
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649 end); |
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650 local test_error = {}; |
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651 on_finally = spy.new(function () error(test_error) end); |
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652 p2 = p:finally(on_finally); |
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653 |
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654 local on_finally_err = spy.new(function () end); |
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655 p2:catch(on_finally_err); |
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656 assert.spy(on_finally).was_called(0); |
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657 assert.spy(on_finally_err).was_called(0); |
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658 reject("foo"); |
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659 assert.spy(on_finally).was_called(1); |
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660 assert.spy(on_finally_err).was_called(1); |
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661 assert.spy(on_finally).was_not_called_with("foo"); |
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662 assert.spy(on_finally).was_not_called_with(test_error); |
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663 assert.spy(on_finally_err).was_called_with(test_error); |
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664 end); |
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665 end); |
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666 describe("try()", function () |
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667 it("works with functions that return a promise", function () |
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668 local resolve; |
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669 local p = promise.try(function () |
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670 return promise.new(function (_resolve) |
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671 resolve = _resolve; |
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672 end); |
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673 end); |
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674 assert.is_function(resolve); |
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675 local on_resolved = spy.new(function () end); |
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676 p:next(on_resolved); |
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677 assert.spy(on_resolved).was_not_called(); |
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678 resolve("foo"); |
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679 assert.spy(on_resolved).was_called_with("foo"); |
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680 end); |
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681 |
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682 it("works with functions that return a value", function () |
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683 local p = promise.try(function () |
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684 return "foo"; |
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685 end); |
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686 local on_resolved = spy.new(function () end); |
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687 p:next(on_resolved); |
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688 assert.spy(on_resolved).was_called_with("foo"); |
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689 end); |
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690 |
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691 it("works with functions that return a promise that rejects", function () |
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692 local reject; |
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693 local p = promise.try(function () |
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694 return promise.new(function (_, _reject) |
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695 reject = _reject; |
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696 end); |
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697 end); |
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698 assert.is_function(reject); |
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699 local on_rejected = spy.new(function () end); |
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700 p:catch(on_rejected); |
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701 assert.spy(on_rejected).was_not_called(); |
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702 reject("foo"); |
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703 assert.spy(on_rejected).was_called_with("foo"); |
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704 end); |
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705 |
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706 it("works with functions that throw errors", function () |
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707 local test_error = {}; |
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708 local p = promise.try(function () |
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709 error(test_error); |
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710 end); |
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711 local on_rejected = spy.new(function () end); |
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712 p:catch(on_rejected); |
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713 assert.spy(on_rejected).was_called(1); |
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714 assert.spy(on_rejected).was_called_with(test_error); |
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715 end); |
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716 end); |
11947
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717 describe("set_nexttick()", function () |
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718 it("works", function () |
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719 local next_tick = spy.new(function (f) |
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720 f(); |
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721 end) |
11951 | 722 local cb = spy.new(function () end); |
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723 promise.set_nexttick(next_tick); |
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724 promise.new(function (y, _) |
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725 y("okay"); |
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726 end):next(cb); |
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727 assert.spy(next_tick).was.called(); |
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728 assert.spy(cb).was.called_with("okay"); |
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729 end); |
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730 end) |
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731 end); |