author | Kim Alvefur <zash@zash.se> |
Sat, 24 Feb 2024 00:05:29 +0100 | |
changeset 13443 | 1e229d710a3c |
parent 13403 | f4415f76727b |
permissions | -rw-r--r-- |
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util.throttle: Silence some strict luacheck warnings
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-- luacheck: ignore 411/a |
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|
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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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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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|
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|
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local throttle = require "util.throttle"; |
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describe("util.throttle", function() |
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describe("#create()", function() |
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it("should be created with correct values", function() |
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now = 5; |
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local a = throttle.create(3, 10); |
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assert.same(a, { balance = 3, max = 3, rate = 0.3, t = 5 }); |
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|
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local a = throttle.create(3, 5); |
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assert.same(a, { balance = 3, max = 3, rate = 0.6, t = 5 }); |
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|
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local a = throttle.create(1, 1); |
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assert.same(a, { balance = 1, max = 1, rate = 1, t = 5 }); |
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|
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local a = throttle.create(10, 10); |
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assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 }); |
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|
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local a = throttle.create(10, 1); |
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assert.same(a, { balance = 10, max = 10, rate = 10, t = 5 }); |
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end); |
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end); |
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36 |
|
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describe("#update()", function() |
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it("does nothing when no time has passed, even if balance is not full", function() |
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now = 5; |
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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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for i=1,5 do |
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a:update(); |
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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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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 |
9997
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Fix various spelling mistakes [codespell]
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92 |
assert(math.abs(a.balance - 1) < 0.0001); -- incremental updates cause rounding errors |
8248
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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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112 |
assert.is_false(a:poll(1)); -- MEEP, out of credits! |
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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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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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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); |