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spec/util_throttle_spec.lua

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spec/util_throttle_spec.lua @ 13130:0b650a54ff9a

doc/hgrc-email: Example config for using 'hg email' to contribute The initial setup can be tricky if you don't know what and were settings should be added. This should maybe also go into site/doc/contributing
author Kim Alvefur <zash@zash.se>
date Wed, 07 Jun 2023 16:56:53 +0200
parent 9993:02a41315d275
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1
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3 -- Mock util.time
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4 local now = 0; -- wibbly-wobbly... timey-wimey... stuff
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5 local function later(n)
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6 now = now + n; -- time passes at a different rate
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7 end
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8 package.loaded["util.time"] = {
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9 now = function() return now; end
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10 }
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13 local throttle = require "util.throttle";
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14
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15 describe("util.throttle", function()
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16 describe("#create()", function()
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17 it("should be created with correct values", function()
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18 now = 5;
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19 local a = throttle.create(3, 10);
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20 assert.same(a, { balance = 3, max = 3, rate = 0.3, t = 5 });
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22 local a = throttle.create(3, 5);
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23 assert.same(a, { balance = 3, max = 3, rate = 0.6, t = 5 });
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25 local a = throttle.create(1, 1);
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26 assert.same(a, { balance = 1, max = 1, rate = 1, t = 5 });
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28 local a = throttle.create(10, 10);
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29 assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 });
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31 local a = throttle.create(10, 1);
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32 assert.same(a, { balance = 10, max = 10, rate = 10, t = 5 });
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33 end);
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34 end);
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35
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36 describe("#update()", function()
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37 it("does nothing when no time has passed, even if balance is not full", function()
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38 now = 5;
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39 local a = throttle.create(10, 10);
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40 for i=1,5 do
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41 a:update();
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42 assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 });
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43 end
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44 a.balance = 0;
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45 for i=1,5 do
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46 a:update();
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47 assert.same(a, { balance = 0, max = 10, rate = 1, t = 5 });
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48 end
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49 end);
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50 it("updates only time when time passes but balance is full", function()
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51 now = 5;
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52 local a = throttle.create(10, 10);
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53 for i=1,5 do
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54 later(5);
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55 a:update();
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56 assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 + i*5 });
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57 end
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58 end);
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59 it("updates balance when balance has room to grow as time passes", function()
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60 now = 5;
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61 local a = throttle.create(10, 10);
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62 a.balance = 0;
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63 assert.same(a, { balance = 0, max = 10, rate = 1, t = 5 });
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64
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65 later(1);
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66 a:update();
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67 assert.same(a, { balance = 1, max = 10, rate = 1, t = 6 });
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68
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69 later(3);
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70 a:update();
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71 assert.same(a, { balance = 4, max = 10, rate = 1, t = 9 });
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72
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73 later(10);
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74 a:update();
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75 assert.same(a, { balance = 10, max = 10, rate = 1, t = 19 });
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76 end);
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77 it("handles 10 x 0.1s updates the same as 1 x 1s update ", function()
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78 now = 5;
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79 local a = throttle.create(1, 1);
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80
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81 a.balance = 0;
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82 later(1);
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83 a:update();
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84 assert.same(a, { balance = 1, max = 1, rate = 1, t = now });
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85
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86 a.balance = 0;
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87 for i=1,10 do
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88 later(0.1);
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89 a:update();
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90 end
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91 assert(math.abs(a.balance - 1) < 0.0001); -- incremental updates cause rounding errors
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92 end);
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93 end);
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94
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95 -- describe("po")
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96
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97 describe("#poll()", function()
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98 it("should only allow successful polls until cost is hit", function()
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99 now = 5;
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100
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101 local a = throttle.create(3, 10);
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parents: 8236
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102 assert.same(a, { balance = 3, max = 3, rate = 0.3, t = 5 });
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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parents: 8236
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103
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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parents: 8236
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104 assert.is_true(a:poll(1)); -- 3 -> 2
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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parents: 8236
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105 assert.same(a, { balance = 2, max = 3, rate = 0.3, t = 5 });
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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parents: 8236
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106
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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parents: 8236
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107 assert.is_true(a:poll(2)); -- 2 -> 1
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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108 assert.same(a, { balance = 0, max = 3, rate = 0.3, t = 5 });
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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parents: 8236
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109
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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parents: 8236
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110 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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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111 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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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112 assert.same(a, { balance = 0, max = 3, rate = 0.3, t = 5 });
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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113 end);
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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parents: 8236
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114
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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115 it("should not allow polls more than the cost", function()
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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116 now = 0;
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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parents: 8236
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117
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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118 local a = throttle.create(10, 10);
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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119 assert.same(a, { balance = 10, max = 10, rate = 1, t = 0 });
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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parents: 8236
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120
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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121 assert.is_false(a:poll(11));
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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122 assert.same(a, { balance = 10, max = 10, rate = 1, t = 0 });
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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parents: 8236
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123
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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parents: 8236
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124 assert.is_true(a:poll(6));
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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125 assert.same(a, { balance = 4, max = 10, rate = 1, t = 0 });
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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parents: 8236
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126
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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parents: 8236
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127 assert.is_false(a:poll(5));
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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parents: 8236
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128 assert.same(a, { balance = 4, max = 10, rate = 1, t = 0 });
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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parents: 8236
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129
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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parents: 8236
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130 -- fractional
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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parents: 8236
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131 assert.is_true(a:poll(3.5));
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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132 assert.same(a, { balance = 0.5, max = 10, rate = 1, t = 0 });
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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parents: 8236
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133
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parents: 8236
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134 assert.is_true(a:poll(0.25));
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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135 assert.same(a, { balance = 0.25, max = 10, rate = 1, t = 0 });
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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parents: 8236
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136
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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137 assert.is_false(a:poll(0.3));
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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138 assert.same(a, { balance = 0.25, max = 10, rate = 1, t = 0 });
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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parents: 8236
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139
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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140 assert.is_true(a:poll(0.25));
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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141 assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 });
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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parents: 8236
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142
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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143 assert.is_false(a:poll(0.1));
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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144 assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 });
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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parents: 8236
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145
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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146 assert.is_true(a:poll(0));
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)
Waqas Hussain <waqas20@gmail.com>
parents: 8236
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147 assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 });
8236
4878e4159e12 Port tests to the `busted` test runner
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parents:
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148 end);
4878e4159e12 Port tests to the `busted` test runner
Waqas Hussain <waqas20@gmail.com>
parents:
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149 end);
4878e4159e12 Port tests to the `busted` test runner
Waqas Hussain <waqas20@gmail.com>
parents:
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150 end);