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spec/util_async_spec.lua @ 8648:ca710a71d730
util.async: Add ready() to check whether running in async context
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Thu, 22 Mar 2018 07:46:23 +0000 |
| parent | 8633:8ec18a002c30 |
| child | 8649:9246f64d6f1e |
| rev | line source |
|---|---|
| 8605 | 1 local async = require "util.async"; |
| 2 | |
| 3 describe("util.async", function() | |
| 4 local debug = false; | |
| 5 local print = print; | |
| 6 if debug then | |
| 7 require "util.logger".add_simple_sink(print); | |
| 8 else | |
| 9 print = function () end | |
| 10 end | |
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11 |
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12 local function mock_watchers(event_log) |
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13 local function generic_logging_watcher(name) |
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14 return function (...) |
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15 table.insert(event_log, { name = name, n = select("#", ...)-1, select(2, ...) }); |
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16 end; |
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17 end; |
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18 return setmetatable(mock{ |
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19 ready = generic_logging_watcher("ready"); |
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20 waiting = generic_logging_watcher("waiting"); |
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21 error = generic_logging_watcher("error"); |
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22 }, { |
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23 __index = function (_, event) |
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24 -- Unexpected watcher called |
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25 assert(false, "unexpected watcher called: "..event); |
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26 end; |
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27 }) |
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28 end |
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29 |
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30 local function new(func) |
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31 local event_log = {}; |
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32 local spy_func = spy.new(func); |
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33 return async.runner(spy_func, mock_watchers(event_log)), spy_func, event_log; |
| 8605 | 34 end |
| 35 describe("#runner", function() | |
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36 it("should work", function() |
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37 local r = new(function (item) assert(type(item) == "number") end); |
| 8605 | 38 r:run(1); |
| 39 r:run(2); | |
| 40 end); | |
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41 |
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42 it("should be ready after creation", function () |
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43 local r = new(function () end); |
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44 assert.equal(r.state, "ready"); |
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45 end); |
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46 |
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47 it("should do nothing if the queue is empty", function () |
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48 local did_run; |
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49 local r = new(function () did_run = true end); |
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50 r:run(); |
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51 assert.equal(r.state, "ready"); |
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52 assert.is_nil(did_run); |
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53 r:run("hello"); |
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54 assert.is_true(did_run); |
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55 end); |
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56 |
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57 it("should support queuing work items without running", function () |
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58 local did_run; |
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59 local r = new(function () did_run = true end); |
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60 r:enqueue("hello"); |
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61 assert.equal(r.state, "ready"); |
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62 assert.is_nil(did_run); |
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63 r:run(); |
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64 assert.is_true(did_run); |
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65 end); |
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66 |
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67 it("should support queuing multiple work items", function () |
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68 local last_item; |
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69 local r, s = new(function (item) last_item = item; end); |
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70 r:enqueue("hello"); |
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71 r:enqueue("there"); |
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72 r:enqueue("world"); |
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73 assert.equal(r.state, "ready"); |
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74 r:run(); |
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75 assert.equal(r.state, "ready"); |
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76 assert.spy(s).was.called(3); |
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77 assert.equal(last_item, "world"); |
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78 end); |
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79 |
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80 it("should support all simple data types", function () |
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81 local last_item; |
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82 local r, s = new(function (item) last_item = item; end); |
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83 local values = { {}, 123, "hello", true, false }; |
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84 for i = 1, #values do |
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85 r:enqueue(values[i]); |
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86 end |
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87 assert.equal(r.state, "ready"); |
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88 r:run(); |
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89 assert.equal(r.state, "ready"); |
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90 assert.spy(s).was.called(#values); |
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91 for i = 1, #values do |
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92 assert.spy(s).was.called_with(values[i]); |
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93 end |
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94 assert.equal(last_item, values[#values]); |
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95 end); |
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96 |
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97 describe("#errors", function () |
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98 describe("should notify", function () |
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99 local last_processed_item, last_error; |
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100 local r; |
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101 r = async.runner(function (item) |
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102 if item == "error" then |
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103 error({ e = "test error" }); |
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104 end |
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105 last_processed_item = item; |
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106 end, mock{ |
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107 ready = function () end; |
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108 waiting = function () end; |
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109 error = function (runner, err) |
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110 assert.equal(r, runner); |
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111 last_error = err; |
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112 end; |
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113 }); |
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114 |
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115 -- Simple item, no error |
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116 r:run("hello"); |
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117 assert.equal(r.state, "ready"); |
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118 assert.equal(last_processed_item, "hello"); |
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119 assert.spy(r.watchers.ready).was_not.called(); |
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120 assert.spy(r.watchers.error).was_not.called(); |
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121 |
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122 -- Trigger an error inside the runner |
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123 assert.equal(last_error, nil); |
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124 r:run("error"); |
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125 test("the correct watcher functions", function () |
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126 -- Only the error watcher should have been called |
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127 assert.spy(r.watchers.ready).was_not.called(); |
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128 assert.spy(r.watchers.waiting).was_not.called(); |
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129 assert.spy(r.watchers.error).was.called(1); |
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130 end); |
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131 test("with the correct error", function () |
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132 -- The error watcher state should be correct, to |
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133 -- demonstrate the error was passed correctly |
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134 assert.is_table(last_error); |
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135 assert.equal(last_error.e, "test error"); |
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136 last_error = nil; |
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137 end); |
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138 assert.equal(r.state, "ready"); |
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139 assert.equal(last_processed_item, "hello"); |
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140 end); |
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141 |
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142 do |
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143 local last_processed_item, last_error; |
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144 local r; |
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145 local wait, done; |
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146 r = async.runner(function (item) |
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147 if item == "error" then |
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148 error({ e = "test error" }); |
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149 elseif item == "wait" then |
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150 wait, done = async.waiter(); |
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151 wait(); |
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152 error({ e = "post wait error" }); |
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153 end |
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154 last_processed_item = item; |
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155 end, mock({ |
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156 ready = function () end; |
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157 waiting = function () end; |
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158 error = function (runner, err) |
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159 assert.equal(r, runner); |
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160 last_error = err; |
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161 end; |
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162 })); |
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163 |
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164 randomize(false); --luacheck: ignore 113/randomize |
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165 |
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166 it("should not be fatal to the runner", function () |
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167 r:run("world"); |
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168 assert.equal(r.state, "ready"); |
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169 assert.spy(r.watchers.ready).was_not.called(); |
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170 assert.equal(last_processed_item, "world"); |
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171 end); |
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172 it("should work despite a #waiter", function () |
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173 -- This test covers an important case where a runner |
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174 -- throws an error while being executed outside of the |
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175 -- main loop. This happens when it was blocked ('waiting'), |
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176 -- and then released (via a call to done()). |
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177 last_error = nil; |
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178 r:run("wait"); |
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179 assert.equal(r.state, "waiting"); |
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180 assert.spy(r.watchers.waiting).was.called(1); |
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181 done(); |
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182 -- At this point an error happens (state goes error->ready) |
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183 assert.equal(r.state, "ready"); |
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184 assert.spy(r.watchers.error).was.called(1); |
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185 assert.spy(r.watchers.ready).was.called(1); |
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186 assert.is_table(last_error); |
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187 assert.equal(last_error.e, "post wait error"); |
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188 last_error = nil; |
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189 r:run("hello again"); |
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190 assert.spy(r.watchers.ready).was.called(1); |
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191 assert.spy(r.watchers.waiting).was.called(1); |
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192 assert.spy(r.watchers.error).was.called(1); |
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193 assert.equal(r.state, "ready"); |
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194 assert.equal(last_processed_item, "hello again"); |
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195 end); |
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196 end |
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197 |
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198 it("should continue to process work items", function () |
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199 local last_item; |
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200 local runner, runner_func = new(function (item) |
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201 if item == "error" then |
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202 error("test error"); |
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203 end |
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204 last_item = item; |
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205 end); |
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206 runner:enqueue("one"); |
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207 runner:enqueue("error"); |
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208 runner:enqueue("two"); |
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209 runner:run(); |
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210 assert.equal(runner.state, "ready"); |
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211 assert.spy(runner_func).was.called(3); |
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212 assert.spy(runner.watchers.error).was.called(1); |
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213 assert.spy(runner.watchers.ready).was.called(0); |
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214 assert.spy(runner.watchers.waiting).was.called(0); |
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215 assert.equal(last_item, "two"); |
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216 end); |
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217 |
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218 it("should continue to process work items during resume", function () |
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219 local wait, done, last_item; |
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220 local runner, runner_func = new(function (item) |
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221 if item == "wait-error" then |
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222 wait, done = async.waiter(); |
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223 wait(); |
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224 error("test error"); |
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225 end |
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226 last_item = item; |
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227 end); |
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228 runner:enqueue("one"); |
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229 runner:enqueue("wait-error"); |
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230 runner:enqueue("two"); |
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231 runner:run(); |
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232 done(); |
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233 assert.equal(runner.state, "ready"); |
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234 assert.spy(runner_func).was.called(3); |
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235 assert.spy(runner.watchers.error).was.called(1); |
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236 assert.spy(runner.watchers.waiting).was.called(1); |
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237 assert.spy(runner.watchers.ready).was.called(1); |
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238 assert.equal(last_item, "two"); |
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239 end); |
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240 end); |
| 8605 | 241 end); |
| 242 describe("#waiter", function() | |
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243 it("should error outside of async context", function () |
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244 assert.has_error(function () |
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245 async.waiter(); |
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246 end); |
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247 end); |
| 8605 | 248 it("should work", function () |
| 249 local wait, done; | |
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250 |
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251 local r = new(function (item) |
| 8605 | 252 assert(type(item) == "number") |
| 253 if item == 3 then | |
| 254 wait, done = async.waiter(); | |
| 255 wait(); | |
| 256 end | |
| 257 end); | |
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258 |
| 8605 | 259 r:run(1); |
| 260 assert(r.state == "ready"); | |
| 261 r:run(2); | |
| 262 assert(r.state == "ready"); | |
| 263 r:run(3); | |
| 264 assert(r.state == "waiting"); | |
| 265 done(); | |
| 266 assert(r.state == "ready"); | |
| 267 --for k, v in ipairs(l) do print(k,v) end | |
| 268 end); | |
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269 |
| 8605 | 270 it("should work", function () |
| 271 -------------------- | |
| 272 local wait, done; | |
| 273 local last_item = 0; | |
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274 local r = new(function (item) |
| 8605 | 275 assert(type(item) == "number") |
| 276 assert(item == last_item + 1); | |
| 277 last_item = item; | |
| 278 if item == 3 then | |
| 279 wait, done = async.waiter(); | |
| 280 wait(); | |
| 281 end | |
| 282 end); | |
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283 |
| 8605 | 284 r:run(1); |
| 285 assert(r.state == "ready"); | |
| 286 r:run(2); | |
| 287 assert(r.state == "ready"); | |
| 288 r:run(3); | |
| 289 assert(r.state == "waiting"); | |
| 290 r:run(4); | |
| 291 assert(r.state == "waiting"); | |
| 292 done(); | |
| 293 assert(r.state == "ready"); | |
| 294 --for k, v in ipairs(l) do print(k,v) end | |
| 295 end); | |
| 296 it("should work", function () | |
| 297 -------------------- | |
| 298 local wait, done; | |
| 299 local last_item = 0; | |
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300 local r = new(function (item) |
| 8605 | 301 assert(type(item) == "number") |
| 302 assert((item == last_item + 1) or item == 3); | |
| 303 last_item = item; | |
| 304 if item == 3 then | |
| 305 wait, done = async.waiter(); | |
| 306 wait(); | |
| 307 end | |
| 308 end); | |
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309 |
| 8605 | 310 r:run(1); |
| 311 assert(r.state == "ready"); | |
| 312 r:run(2); | |
| 313 assert(r.state == "ready"); | |
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314 |
| 8605 | 315 r:run(3); |
| 316 assert(r.state == "waiting"); | |
| 317 r:run(3); | |
| 318 assert(r.state == "waiting"); | |
| 319 r:run(3); | |
| 320 assert(r.state == "waiting"); | |
| 321 r:run(4); | |
| 322 assert(r.state == "waiting"); | |
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323 |
| 8605 | 324 for i = 1, 3 do |
| 325 done(); | |
| 326 if i < 3 then | |
| 327 assert(r.state == "waiting"); | |
| 328 end | |
| 329 end | |
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330 |
| 8605 | 331 assert(r.state == "ready"); |
| 332 --for k, v in ipairs(l) do print(k,v) end | |
| 333 end); | |
| 334 it("should work", function () | |
| 335 -------------------- | |
| 336 local wait, done; | |
| 337 local last_item = 0; | |
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338 local r = new(function (item) |
| 8605 | 339 assert(type(item) == "number") |
| 340 assert((item == last_item + 1) or item == 3); | |
| 341 last_item = item; | |
| 342 if item == 3 then | |
| 343 wait, done = async.waiter(); | |
| 344 wait(); | |
| 345 end | |
| 346 end); | |
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347 |
| 8605 | 348 r:run(1); |
| 349 assert(r.state == "ready"); | |
| 350 r:run(2); | |
| 351 assert(r.state == "ready"); | |
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352 |
| 8605 | 353 r:run(3); |
| 354 assert(r.state == "waiting"); | |
| 355 r:run(3); | |
| 356 assert(r.state == "waiting"); | |
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357 |
| 8605 | 358 for i = 1, 2 do |
| 359 done(); | |
| 360 if i < 2 then | |
| 361 assert(r.state == "waiting"); | |
| 362 end | |
| 363 end | |
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364 |
| 8605 | 365 assert(r.state == "ready"); |
| 366 r:run(4); | |
| 367 assert(r.state == "ready"); | |
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368 |
| 8605 | 369 assert(r.state == "ready"); |
| 370 --for k, v in ipairs(l) do print(k,v) end | |
| 371 end); | |
| 372 it("should work with multiple runners in parallel", function () | |
| 373 -- Now with multiple runners | |
| 374 -------------------- | |
| 375 local wait1, done1; | |
| 376 local last_item1 = 0; | |
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377 local r1 = new(function (item) |
| 8605 | 378 assert(type(item) == "number") |
| 379 assert((item == last_item1 + 1) or item == 3); | |
| 380 last_item1 = item; | |
| 381 if item == 3 then | |
| 382 wait1, done1 = async.waiter(); | |
| 383 wait1(); | |
| 384 end | |
| 385 end, "r1"); | |
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386 |
| 8605 | 387 local wait2, done2; |
| 388 local last_item2 = 0; | |
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389 local r2 = new(function (item) |
| 8605 | 390 assert(type(item) == "number") |
| 391 assert((item == last_item2 + 1) or item == 3); | |
| 392 last_item2 = item; | |
| 393 if item == 3 then | |
| 394 wait2, done2 = async.waiter(); | |
| 395 wait2(); | |
| 396 end | |
| 397 end, "r2"); | |
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398 |
| 8605 | 399 r1:run(1); |
| 400 assert(r1.state == "ready"); | |
| 401 r1:run(2); | |
| 402 assert(r1.state == "ready"); | |
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403 |
| 8605 | 404 r1:run(3); |
| 405 assert(r1.state == "waiting"); | |
| 406 r1:run(3); | |
| 407 assert(r1.state == "waiting"); | |
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408 |
| 8605 | 409 r2:run(1); |
| 410 assert(r1.state == "waiting"); | |
| 411 assert(r2.state == "ready"); | |
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412 |
| 8605 | 413 r2:run(2); |
| 414 assert(r1.state == "waiting"); | |
| 415 assert(r2.state == "ready"); | |
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416 |
| 8605 | 417 r2:run(3); |
| 418 assert(r1.state == "waiting"); | |
| 419 assert(r2.state == "waiting"); | |
| 420 done2(); | |
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421 |
| 8605 | 422 r2:run(3); |
| 423 assert(r1.state == "waiting"); | |
| 424 assert(r2.state == "waiting"); | |
| 425 done2(); | |
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426 |
| 8605 | 427 r2:run(4); |
| 428 assert(r1.state == "waiting"); | |
| 429 assert(r2.state == "ready"); | |
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430 |
| 8605 | 431 for i = 1, 2 do |
| 432 done1(); | |
| 433 if i < 2 then | |
| 434 assert(r1.state == "waiting"); | |
| 435 end | |
| 436 end | |
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437 |
| 8605 | 438 assert(r1.state == "ready"); |
| 439 r1:run(4); | |
| 440 assert(r1.state == "ready"); | |
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441 |
| 8605 | 442 assert(r1.state == "ready"); |
| 443 --for k, v in ipairs(l1) do print(k,v) end | |
| 444 end); | |
| 445 it("should work work with multiple runners in parallel", function () | |
| 446 -------------------- | |
| 447 local wait1, done1; | |
| 448 local last_item1 = 0; | |
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449 local r1 = new(function (item) |
| 8605 | 450 print("r1 processing ", item); |
| 451 assert(type(item) == "number") | |
| 452 assert((item == last_item1 + 1) or item == 3); | |
| 453 last_item1 = item; | |
| 454 if item == 3 then | |
| 455 wait1, done1 = async.waiter(); | |
| 456 wait1(); | |
| 457 end | |
| 458 end, "r1"); | |
| 459 | |
| 460 local wait2, done2; | |
| 461 local last_item2 = 0; | |
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462 local r2 = new(function (item) |
| 8605 | 463 print("r2 processing ", item); |
| 464 assert.is_number(item); | |
| 465 assert((item == last_item2 + 1) or item == 3); | |
| 466 last_item2 = item; | |
| 467 if item == 3 then | |
| 468 wait2, done2 = async.waiter(); | |
| 469 wait2(); | |
| 470 end | |
| 471 end, "r2"); | |
| 472 | |
| 473 r1:run(1); | |
| 474 assert.equal(r1.state, "ready"); | |
| 475 r1:run(2); | |
| 476 assert.equal(r1.state, "ready"); | |
| 477 | |
| 478 r1:run(5); | |
| 479 assert.equal(r1.state, "ready"); | |
| 480 | |
| 481 r1:run(3); | |
| 482 assert.equal(r1.state, "waiting"); | |
| 483 r1:run(5); -- Will error, when we get to it | |
| 484 assert.equal(r1.state, "waiting"); | |
| 485 done1(); | |
| 486 assert.equal(r1.state, "ready"); | |
| 487 r1:run(3); | |
| 488 assert.equal(r1.state, "waiting"); | |
| 489 | |
| 490 r2:run(1); | |
| 491 assert.equal(r1.state, "waiting"); | |
| 492 assert.equal(r2.state, "ready"); | |
| 493 | |
| 494 r2:run(2); | |
| 495 assert.equal(r1.state, "waiting"); | |
| 496 assert.equal(r2.state, "ready"); | |
| 497 | |
| 498 r2:run(3); | |
| 499 assert.equal(r1.state, "waiting"); | |
| 500 assert.equal(r2.state, "waiting"); | |
| 501 | |
| 502 done2(); | |
| 503 assert.equal(r1.state, "waiting"); | |
| 504 assert.equal(r2.state, "ready"); | |
| 505 | |
| 506 r2:run(3); | |
| 507 assert.equal(r1.state, "waiting"); | |
| 508 assert.equal(r2.state, "waiting"); | |
| 509 | |
| 510 done2(); | |
| 511 assert.equal(r1.state, "waiting"); | |
| 512 assert.equal(r2.state, "ready"); | |
| 513 | |
| 514 r2:run(4); | |
| 515 assert.equal(r1.state, "waiting"); | |
| 516 assert.equal(r2.state, "ready"); | |
| 517 | |
| 518 done1(); | |
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519 |
| 8605 | 520 assert.equal(r1.state, "ready"); |
| 521 r1:run(4); | |
| 522 assert.equal(r1.state, "ready"); | |
| 523 | |
| 524 assert.equal(r1.state, "ready"); | |
| 525 end); | |
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526 |
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527 it("should support multiple done() calls", function () |
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528 local processed_item; |
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529 local wait, done; |
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530 local r, rf = new(function (item) |
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531 wait, done = async.waiter(4); |
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532 wait(); |
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533 processed_item = item; |
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534 end); |
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535 r:run("test"); |
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536 for _ = 1, 3 do |
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537 done(); |
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538 assert.equal(r.state, "waiting"); |
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539 assert.is_nil(processed_item); |
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540 end |
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541 done(); |
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542 assert.equal(r.state, "ready"); |
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543 assert.equal(processed_item, "test"); |
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544 assert.spy(r.watchers.error).was_not.called(); |
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545 end); |
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546 |
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547 it("should not allow done() to be called more than specified", function () |
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548 local processed_item; |
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549 local wait, done; |
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550 local r, rf = new(function (item) |
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551 wait, done = async.waiter(4); |
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552 wait(); |
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553 processed_item = item; |
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554 end); |
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555 r:run("test"); |
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556 for _ = 1, 4 do |
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557 done(); |
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558 end |
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559 assert.has_error(done); |
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560 assert.equal(r.state, "ready"); |
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561 assert.equal(processed_item, "test"); |
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562 assert.spy(r.watchers.error).was_not.called(); |
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563 end); |
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564 |
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565 it("should allow done() to be called before wait()", function () |
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566 local processed_item; |
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567 local r, rf = new(function (item) |
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568 local wait, done = async.waiter(); |
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569 done(); |
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570 wait(); |
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571 processed_item = item; |
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572 end); |
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573 r:run("test"); |
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574 assert.equal(processed_item, "test"); |
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575 assert.equal(r.state, "ready"); |
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576 -- Since the observable state did not change, |
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577 -- the watchers should not have been called |
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578 assert.spy(r.watchers.waiting).was_not.called(); |
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579 assert.spy(r.watchers.ready).was_not.called(); |
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580 end); |
| 8605 | 581 end); |
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582 |
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583 describe("#ready()", function () |
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584 it("should return false outside an async context", function () |
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585 assert.falsy(async.ready()); |
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586 end); |
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587 it("should return true inside an async context", function () |
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588 local r = new(function () |
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589 assert.truthy(async.ready()); |
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590 end); |
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591 r:run(true); |
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592 assert.spy(r.func).was.called(); |
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593 assert.spy(r.watchers.error).was_not.called(); |
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594 end); |
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595 end); |
| 8605 | 596 end); |
