Mercurial > prosody-hg

annotate spec/util_ringbuffer_spec.lua @ 14189:12c01089bdb7 13.0

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author Waqas Hussain <waqas20@gmail.com>
date Tue, 26 May 2026 01:31:31 -0400
parents 67b68147ed1d
children
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rev   line source
10897
37df1e757f02 util.ringbuffer: Add some initial tests
Kim Alvefur <zash@zash.se>
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diff changeset
1 local rb = require "util.ringbuffer";
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2 describe("util.ringbuffer", 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(rb.new);
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6 end);
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7 it("can be created", function ()
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8 assert.truthy(rb.new());
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9 end);
10898
c6465fb3c839 util.ringbuffer: Prevent creation of zero-size buffer
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10 it("won't create an empty buffer", function ()
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11 assert.has_error(function ()
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12 rb.new(0);
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13 end);
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14 end);
10899
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15 it("won't create a negatively sized buffer", function ()
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16 assert.has_error(function ()
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17 rb.new(-1);
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18 end);
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19 end);
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20 end);
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21 describe(":write", function ()
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22 local b = rb.new();
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23 it("works", function ()
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24 assert.truthy(b:write("hi"));
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25 end);
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26 end);
10949
8b5b35baf370 util.ringbuffer: Add test for :discard()
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27
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28 describe(":discard", function ()
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29 local b = rb.new();
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30 it("works", function ()
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31 assert.truthy(b:write("hello world"));
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32 assert.truthy(b:discard(6));
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33 assert.equal(5, #b);
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34 assert.equal("world", b:read(5));
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35 end);
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36 end);
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37
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38 describe(":find", function ()
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39 local function test_find(b, str, expected)
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40 if expected ~= nil then
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41 assert.equal(expected, b:find(str));
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42 else
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43 assert.is_nil(b:find(str));
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44 end
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45 end
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46
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47 it("works", function ()
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48 local b = rb.new();
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49 assert.truthy(b:write("hello world"));
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50 test_find(b, "world", 7);
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51 end);
14177
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52
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53 it("works across wraps", function ()
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54 local b = rb.new(5);
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55 assert.truthy(b:write("12345"));
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56 assert.equal("123", b:read(3));
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57 assert.truthy(b:write("678"));
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58 test_find(b, "45678", 1);
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59 test_find(b, "567", 2);
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60 test_find(b, "56", 2);
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61 test_find(b, "5", 2);
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62 test_find(b, "6", 3);
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63 test_find(b, "7", 4);
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64 test_find(b, "8", 5);
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65 test_find(b, "9", nil);
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66 end);
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67
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68 it("no match when the needle is larger than the buffer", function ()
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69 for i = 5, 11 do
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70 local b = rb.new(i);
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71 assert.truthy(b:write("hello"));
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72 test_find(b, "hello world", nil);
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73 end
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74 end);
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75
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76 it("no match when the needle is an empty string", function ()
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77 local b = rb.new(5);
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78 assert.truthy(b:write("hello"));
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79 test_find(b, "", nil);
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80 end);
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81 end);
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82
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83 describe(":sub", function ()
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84 -- Helper function to compare buffer:sub() with string:sub()
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85 local function test_sub(b, x, y)
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86 local s = b:read(#b, true);
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87 local string_result, buffer_result = s:sub(x, y), b:sub(x, y);
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88 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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89 end
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90
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91 it("works", function ()
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92 local b = rb.new();
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93 assert.truthy(b:write("hello world"));
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94 assert.equals("hello", b:sub(1, 5));
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95 end);
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96
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97 it("supports optional end parameter", function ()
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98 local b = rb.new();
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99 assert.truthy(b:write("hello world"));
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100 assert.equals("hello world", b:sub(1));
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101 assert.equals("world", b:sub(-5));
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102 end);
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103
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104 it("is equivalent to string:sub", function ()
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105 local b = rb.new(6);
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106 assert.truthy(b:write("foobar"));
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107 b:read(3);
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108 b:write("foo");
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109 for i = -13, 13 do
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110 for j = -13, 13 do
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111 test_sub(b, i, j);
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112 end
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113 end
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114 end);
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115 end);
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116
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117 describe(":byte", function ()
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118 -- Helper function to compare buffer:byte() with string:byte()
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119 local function test_byte(b, x, y)
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120 local s = b:read(#b, true);
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121 local string_result, buffer_result = {s:byte(x, y)}, {b:byte(x, y)};
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122 assert.same(string_result, buffer_result, ("buffer:byte(%d, %s) does not match string:byte()"):format(x, y and ("%d"):format(y) or "nil"));
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123 end
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124
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125 it("is equivalent to string:byte", function ()
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126 local b = rb.new(6);
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127 assert.truthy(b:write("foobar"));
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128 b:read(3);
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129 b:write("foo");
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130 test_byte(b, 1);
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131 test_byte(b, 3);
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132 test_byte(b, -1);
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133 test_byte(b, -3);
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134 for i = -13, 13 do
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135 for j = -13, 13 do
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136 test_byte(b, i, j);
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137 end
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138 end
5e33926f4b43 util.ringbuffer: Add :sub() and :byte() methods equivalent to the string methods
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139 end);
10953
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140
c3b3ac63f4c3 util.ringbuffer: Ensure unsigned chars are always returned from :byte()
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141 it("works with characters > 127", function ()
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142 local b = rb.new();
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143 b:write(string.char(0, 140));
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144 local r = { b:byte(1, 2) };
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145 assert.same({ 0, 140 }, r);
c3b3ac63f4c3 util.ringbuffer: Ensure unsigned chars are always returned from :byte()
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146 end);
10901
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147 end);
10897
37df1e757f02 util.ringbuffer: Add some initial tests
Kim Alvefur <zash@zash.se>
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148 end);