prosody
1e229d710a3c
spec/util_throttle_spec.lua

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spec/util_throttle_spec.lua @ 13439:1e229d710a3c

util.signal: Add support for signalfd(2) on Linux signalfd allows handling signal events using the same method as sockets, via file descriptors. Thus all signal dispatch can go through the same main event loop as everything else, removing need for thread-scary signal handling where execution would just jump to the signal handler regardless of the state of Lua, and needing to keep track of Lua states/threads.
author Kim Alvefur <zash@zash.se>
date Sat, 24 Feb 2024 00:05:29 +0100
parent 13399:f4415f76727b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 -- luacheck: ignore 411/a
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3
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4 -- Mock util.time
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5 local now = 0; -- wibbly-wobbly... timey-wimey... stuff
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6 local function later(n)
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7 now = now + n; -- time passes at a different rate
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8 end
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9 package.loaded["util.time"] = {
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10 now = function() return now; end
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11 }
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14 local throttle = require "util.throttle";
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16 describe("util.throttle", function()
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17 describe("#create()", function()
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18 it("should be created with correct values", function()
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19 now = 5;
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20 local a = throttle.create(3, 10);
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21 assert.same(a, { balance = 3, max = 3, rate = 0.3, t = 5 });
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23 local a = throttle.create(3, 5);
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24 assert.same(a, { balance = 3, max = 3, rate = 0.6, t = 5 });
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26 local a = throttle.create(1, 1);
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27 assert.same(a, { balance = 1, max = 1, rate = 1, t = 5 });
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29 local a = throttle.create(10, 10);
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30 assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 });
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32 local a = throttle.create(10, 1);
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33 assert.same(a, { balance = 10, max = 10, rate = 10, t = 5 });
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34 end);
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35 end);
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36
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37 describe("#update()", function()
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38 it("does nothing when no time has passed, even if balance is not full", function()
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39 now = 5;
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40 local a = throttle.create(10, 10);
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41 for i=1,5 do
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42 a:update();
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43 assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 });
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44 end
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45 a.balance = 0;
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46 for i=1,5 do
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47 a:update();
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48 assert.same(a, { balance = 0, max = 10, rate = 1, t = 5 });
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49 end
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50 end);
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51 it("updates only time when time passes but balance is full", function()
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52 now = 5;
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53 local a = throttle.create(10, 10);
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54 for i=1,5 do
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55 later(5);
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56 a:update();
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57 assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 + i*5 });
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58 end
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59 end);
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60 it("updates balance when balance has room to grow as time passes", function()
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61 now = 5;
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62 local a = throttle.create(10, 10);
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63 a.balance = 0;
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64 assert.same(a, { balance = 0, max = 10, rate = 1, t = 5 });
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65
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66 later(1);
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67 a:update();
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68 assert.same(a, { balance = 1, max = 10, rate = 1, t = 6 });
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69
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70 later(3);
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71 a:update();
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72 assert.same(a, { balance = 4, max = 10, rate = 1, t = 9 });
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73
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74 later(10);
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75 a:update();
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76 assert.same(a, { balance = 10, max = 10, rate = 1, t = 19 });
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77 end);
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78 it("handles 10 x 0.1s updates the same as 1 x 1s update ", function()
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79 now = 5;
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80 local a = throttle.create(1, 1);
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81
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82 a.balance = 0;
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83 later(1);
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84 a:update();
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85 assert.same(a, { balance = 1, max = 1, rate = 1, t = now });
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86
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87 a.balance = 0;
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88 for i=1,10 do
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89 later(0.1);
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90 a:update();
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91 end
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92 assert(math.abs(a.balance - 1) < 0.0001); -- incremental updates cause rounding errors
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93 end);
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94 end);
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95
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96 -- describe("po")
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97
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98 describe("#poll()", function()
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99 it("should only allow successful polls until cost is hit", function()
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100 now = 5;
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101
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102 local a = throttle.create(3, 10);
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103 assert.same(a, { balance = 3, max = 3, rate = 0.3, t = 5 });
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104
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105 assert.is_true(a:poll(1)); -- 3 -> 2
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106 assert.same(a, { balance = 2, max = 3, rate = 0.3, t = 5 });
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107
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108 assert.is_true(a:poll(2)); -- 2 -> 1
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109 assert.same(a, { balance = 0, max = 3, rate = 0.3, t = 5 });
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110
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111 assert.is_false(a:poll(1)); -- MEEP, out of credits!
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parents: 8236
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112 assert.is_false(a:poll(1)); -- MEEP, out of credits!
9499db96c032 util.throttle: Fix initial time setting (double accounting the first time) and fractional balance updates (0.1*10 was not the same as 1*1)
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113 assert.same(a, { balance = 0, max = 3, rate = 0.3, t = 5 });
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114 end);
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parents: 8236
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115
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116 it("should not allow polls more than the cost", function()
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117 now = 0;
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118
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119 local a = throttle.create(10, 10);
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120 assert.same(a, { balance = 10, max = 10, rate = 1, t = 0 });
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121
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122 assert.is_false(a:poll(11));
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123 assert.same(a, { balance = 10, max = 10, rate = 1, t = 0 });
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124
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125 assert.is_true(a:poll(6));
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126 assert.same(a, { balance = 4, max = 10, rate = 1, t = 0 });
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127
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128 assert.is_false(a:poll(5));
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129 assert.same(a, { balance = 4, max = 10, rate = 1, t = 0 });
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130
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131 -- fractional
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132 assert.is_true(a:poll(3.5));
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133 assert.same(a, { balance = 0.5, max = 10, rate = 1, t = 0 });
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134
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135 assert.is_true(a:poll(0.25));
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136 assert.same(a, { balance = 0.25, max = 10, rate = 1, t = 0 });
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137
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138 assert.is_false(a:poll(0.3));
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139 assert.same(a, { balance = 0.25, max = 10, rate = 1, t = 0 });
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140
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141 assert.is_true(a:poll(0.25));
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142 assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 });
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143
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144 assert.is_false(a:poll(0.1));
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145 assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 });
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146
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147 assert.is_true(a:poll(0));
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148 assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 });
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4878e4159e12 Port tests to the `busted` test runner
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149 end);
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150 end);
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151 end);