prosody
534c055ec378
spec/util_dbuffer_spec.lua

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spec/util_dbuffer_spec.lua @ 13007:534c055ec378

util.session: Add 'since' property with timestamp of session creation
author Matthew Wild <mwild1@gmail.com>
date Wed, 29 Mar 2023 13:01:28 +0100
parent 12764:bf6d2f9fad4d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local dbuffer = require "util.dbuffer";
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2 describe("util.dbuffer", function ()
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3 describe("#new", function ()
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4 it("has a constructor", function ()
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5 assert.Function(dbuffer.new);
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6 end);
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7 it("can be created", function ()
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8 assert.truthy(dbuffer.new());
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9 assert.truthy(dbuffer.new(1));
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10 assert.truthy(dbuffer.new(1024));
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11 end);
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12 it("won't create an empty buffer", function ()
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13 assert.falsy(dbuffer.new(0));
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14 end);
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15 it("won't create a negatively sized buffer", function ()
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16 assert.falsy(dbuffer.new(-1));
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17 end);
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18 end);
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19 describe(":write", function ()
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20 local b = dbuffer.new(10, 3);
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21 it("works", function ()
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22 assert.truthy(b:write("hi"));
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23 end);
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24 it("fails when the buffer is full", function ()
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25 local ret = b:write(" there world, this is a long piece of data");
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26 assert.is_falsy(ret);
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27 end);
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28 it("works when max_chunks is reached", function ()
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29 -- Chunks are an optimization, dbuffer should collapse chunks when needed
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30 for _ = 1, 8 do
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31 assert.truthy(b:write("!"));
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32 end
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33 assert.falsy(b:write("!")); -- Length reached
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34 end);
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35 end);
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36
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37 describe(":read", function ()
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38 it("supports optional bytes parameter", function ()
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39 -- should return the frontmost chunk
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40 local b = dbuffer.new();
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41 assert.truthy(b:write("hello"));
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42 assert.truthy(b:write(" "));
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43 assert.truthy(b:write("world"));
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44 assert.equal("h", b:read(1));
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45
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46 assert.equal("ello", b:read());
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47 assert.equal(" ", b:read());
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48 assert.equal("world", b:read());
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49 end);
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50 it("fails when there is not enough data in the buffer", function ()
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51 local b = dbuffer.new(12);
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52 b:write("hello");
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53 b:write(" ");
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54 b:write("world");
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55 assert.is_falsy(b:read(12));
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56 assert.is_falsy(b:read(13));
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57 end);
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58 end);
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59
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60 describe(":read_until", function ()
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61 it("works", function ()
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62 local b = dbuffer.new();
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63 b:write("hello\n");
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64 b:write("world");
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65 b:write("\n");
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66 b:write("\n\n");
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67 b:write("stuff");
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68 b:write("more\nand more");
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69
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70 assert.equal(nil, b:read_until("."));
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71 assert.equal(nil, b:read_until("%"));
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72 assert.equal("hello\n", b:read_until("\n"));
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73 assert.equal("world\n", b:read_until("\n"));
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74 assert.equal("\n", b:read_until("\n"));
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75 assert.equal("\n", b:read_until("\n"));
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76 assert.equal("stu", b:read(3));
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77 assert.equal("ffmore\n", b:read_until("\n"));
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78 assert.equal(nil, b:read_until("\n"));
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79 assert.equal("and more", b:read_chunk());
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80 end);
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81 end);
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82
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83 describe(":discard", function ()
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84 local b = dbuffer.new();
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85 it("works", function ()
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86 assert.truthy(b:write("hello world"));
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87 assert.truthy(b:discard(6));
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88 assert.equal(5, b:length());
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89 assert.equal(5, b:len());
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90 assert.equal("world", b:read(5));
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91 end);
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92 it("works across chunks", function ()
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93 assert.truthy(b:write("hello"));
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94 assert.truthy(b:write(" "));
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95 assert.truthy(b:write("world"));
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96 assert.truthy(b:discard(3));
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97 assert.equal(8, b:length());
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98 assert.truthy(b:discard(3));
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99 assert.equal(5, b:length());
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100 assert.equal("world", b:read(5));
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101 end);
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102 it("can discard the entire buffer", function ()
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103 assert.equal(b:len(), 0);
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104 assert.truthy(b:write("hello world"));
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105 assert.truthy(b:discard(11));
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106 assert.equal(0, b:len());
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107 assert.truthy(b:write("hello world"));
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108 assert.truthy(b:discard(12));
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109 assert.equal(0, b:len());
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110 assert.truthy(b:write("hello world"));
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111 assert.truthy(b:discard(128));
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112 assert.equal(0, b:len());
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113 end);
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114 it("works on an empty buffer", function ()
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115 assert.truthy(dbuffer.new():discard());
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116 assert.truthy(dbuffer.new():discard(0));
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117 assert.truthy(dbuffer.new():discard(1));
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118 end);
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119 end);
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120
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121 describe(":collapse()", function ()
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122 it("works", function ()
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123 local b = dbuffer.new();
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124 b:write("hello");
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125 b:write(" ");
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126 b:write("world");
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127 b:collapse(6);
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128 local ret, bytes = b:read_chunk();
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129 assert.equal("hello ", ret);
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130 assert.equal(6, bytes);
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131 end);
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132 it("works on an empty buffer", function ()
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133 local b = dbuffer.new();
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134 b:collapse();
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135 end);
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136 end);
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137
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138 describe(":sub", function ()
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139 -- Helper function to compare buffer:sub() with string:sub()
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140 local s = "hello world";
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141 local function test_sub(b, x, y)
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142 local string_result, buffer_result = s:sub(x, y), b:sub(x, y);
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143 assert.equals(string_result, buffer_result, ("buffer:sub(%d, %s) does not match string:sub()"):format(x, y and ("%d"):format(y) or "nil"));
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144 end
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145
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146 it("works", function ()
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147 local b = dbuffer.new();
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148 assert.truthy(b:write("hello world"));
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149 assert.equals("hello", b:sub(1, 5));
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150 end);
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151
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152 it("works after discard", function ()
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153 local b = dbuffer.new(256);
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154 assert.truthy(b:write("foobar"));
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155 assert.equals("foobar", b:sub(1, 6));
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156 assert.truthy(b:discard(3)); -- consume "foo"
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157 assert.equals("bar", b:sub(1, 3));
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158 end);
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159
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160 it("supports optional end parameter", function ()
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161 local b = dbuffer.new();
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162 assert.truthy(b:write("hello world"));
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163 assert.equals("hello world", b:sub(1));
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164 assert.equals("world", b:sub(-5));
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165 end);
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166
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167 it("is equivalent to string:sub", function ()
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168 local b = dbuffer.new(11);
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169 assert.truthy(b:write(s));
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170 for i = -13, 13 do
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171 for j = -13, 13 do
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172 test_sub(b, i, j);
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173 end
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174 end
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175 end);
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176
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177 it("works on an empty buffer", function ()
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178 local b = dbuffer.new();
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179 assert.equal("", b:sub(1, 12));
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180 end);
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181 end);
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182
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183 describe(":byte", function ()
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184 -- Helper function to compare buffer:byte() with string:byte()
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185 local s = "hello world"
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186 local function test_byte(b, x, y)
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187 local string_result, buffer_result = {s:byte(x, y)}, {b:byte(x, y)};
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188 assert.same(
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189 string_result,
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190 buffer_result,
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191 ("buffer:byte(%s, %s) does not match string:byte()"):format(x and ("%d"):format(x) or "nil", y and ("%d"):format(y) or "nil")
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192 );
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193 end
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194
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195 it("is equivalent to string:byte", function ()
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196 local b = dbuffer.new(11);
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197 assert.truthy(b:write(s));
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198 test_byte(b, 1);
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199 test_byte(b, 3);
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200 test_byte(b, -1);
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201 test_byte(b, -3);
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202 test_byte(b, nil, 5);
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203 for i = -13, 13 do
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204 for j = -13, 13 do
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205 test_byte(b, i, j);
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206 end
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207 end
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208 end);
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209
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210 it("works with characters > 127", function ()
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211 local b = dbuffer.new();
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212 b:write(string.char(0, 140));
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213 local r = { b:byte(1, 2) };
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214 assert.same({ 0, 140 }, r);
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215 end);
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216
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217 it("works on an empty buffer", function ()
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218 local b = dbuffer.new();
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219 assert.equal("", b:sub(1,1));
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220 end);
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221 end);
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222 end);