author | Kim Alvefur <zash@zash.se> |
Tue, 22 Nov 2022 23:56:01 +0100 | |
branch | 0.11 |
changeset 12801 | be09ac8300a7 |
parent 9560 | d7fdd418adf8 |
child 10301 | da9f21a70e52 |
permissions | -rw-r--r-- |
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local promise = require "util.promise"; |
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|
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describe("util.promise", function () |
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--luacheck: ignore 212/resolve 212/reject |
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describe("new()", function () |
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it("returns a promise object", function () |
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assert(promise.new()); |
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end); |
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end); |
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it("notifies immediately for fulfilled promises", function () |
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local p = promise.new(function (resolve) |
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resolve("foo"); |
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end); |
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local cb = spy.new(function (v) |
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assert.equal("foo", v); |
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end); |
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p:next(cb); |
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assert.spy(cb).was_called(1); |
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end); |
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it("notifies on fulfilment of pending promises", function () |
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local r; |
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local p = promise.new(function (resolve) |
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r = resolve; |
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end); |
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local cb = spy.new(function (v) |
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assert.equal("foo", v); |
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end); |
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p:next(cb); |
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assert.spy(cb).was_called(0); |
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r("foo"); |
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assert.spy(cb).was_called(1); |
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end); |
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it("allows chaining :next() calls", function () |
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local r; |
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local result; |
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local p = promise.new(function (resolve) |
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r = resolve; |
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end); |
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local cb1 = spy.new(function (v) |
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assert.equal("foo", v); |
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return "bar"; |
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end); |
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local cb2 = spy.new(function (v) |
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assert.equal("bar", v); |
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result = v; |
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end); |
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p:next(cb1):next(cb2); |
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assert.spy(cb1).was_called(0); |
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assert.spy(cb2).was_called(0); |
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r("foo"); |
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assert.spy(cb1).was_called(1); |
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assert.spy(cb2).was_called(1); |
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assert.equal("bar", result); |
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end); |
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it("supports multiple :next() calls on the same promise", function () |
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local r; |
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local result; |
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local p = promise.new(function (resolve) |
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r = resolve; |
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end); |
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local cb1 = spy.new(function (v) |
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assert.equal("foo", v); |
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result = v; |
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end); |
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local cb2 = spy.new(function (v) |
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assert.equal("foo", v); |
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result = v; |
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end); |
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p:next(cb1); |
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p:next(cb2); |
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assert.spy(cb1).was_called(0); |
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assert.spy(cb2).was_called(0); |
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r("foo"); |
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assert.spy(cb1).was_called(1); |
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assert.spy(cb2).was_called(1); |
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assert.equal("foo", result); |
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end); |
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it("automatically rejects on error", function () |
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local r; |
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local p = promise.new(function (resolve) |
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r = resolve; |
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error("oh no"); |
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end); |
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84 |
local cb = spy.new(function () end); |
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local err_cb = spy.new(function (v) |
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86 |
assert.equal("oh no", v); |
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87 |
end); |
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p:next(cb, err_cb); |
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89 |
assert.spy(cb).was_called(0); |
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assert.spy(err_cb).was_called(1); |
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r("foo"); |
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92 |
assert.spy(cb).was_called(0); |
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assert.spy(err_cb).was_called(1); |
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end); |
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it("supports reject()", function () |
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local r, result; |
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97 |
local p = promise.new(function (resolve, reject) |
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r = reject; |
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99 |
end); |
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100 |
local cb = spy.new(function () end); |
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101 |
local err_cb = spy.new(function (v) |
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102 |
result = v; |
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103 |
assert.equal("oh doh", v); |
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104 |
end); |
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105 |
p:next(cb, err_cb); |
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106 |
assert.spy(cb).was_called(0); |
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107 |
assert.spy(err_cb).was_called(0); |
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108 |
r("oh doh"); |
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109 |
assert.spy(cb).was_called(0); |
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110 |
assert.spy(err_cb).was_called(1); |
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111 |
assert.equal("oh doh", result); |
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112 |
end); |
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113 |
it("supports chaining of rejected promises", function () |
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114 |
local r, result; |
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115 |
local p = promise.new(function (resolve, reject) |
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116 |
r = reject; |
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117 |
end); |
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118 |
local cb = spy.new(function () end); |
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119 |
local err_cb = spy.new(function (v) |
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120 |
result = v; |
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121 |
assert.equal("oh doh", v); |
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122 |
return "ok" |
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123 |
end); |
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124 |
local cb2 = spy.new(function (v) |
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result = v; |
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end); |
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local err_cb2 = spy.new(function () end); |
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128 |
p:next(cb, err_cb):next(cb2, err_cb2) |
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129 |
assert.spy(cb).was_called(0); |
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130 |
assert.spy(err_cb).was_called(0); |
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131 |
assert.spy(cb2).was_called(0); |
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132 |
assert.spy(err_cb2).was_called(0); |
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133 |
r("oh doh"); |
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134 |
assert.spy(cb).was_called(0); |
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135 |
assert.spy(err_cb).was_called(1); |
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136 |
assert.spy(cb2).was_called(1); |
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137 |
assert.spy(err_cb2).was_called(0); |
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138 |
assert.equal("ok", result); |
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139 |
end); |
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140 |
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141 |
it("propagates errors down the chain, even when some handlers are not provided", function () |
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142 |
local r, result; |
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143 |
local test_error = {}; |
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144 |
local p = promise.new(function (resolve, reject) |
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r = reject; |
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146 |
end); |
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147 |
local cb = spy.new(function () end); |
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148 |
local err_cb = spy.new(function (e) result = e end); |
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149 |
local p2 = p:next(function () error(test_error) end); |
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150 |
local p3 = p2:next(cb) |
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151 |
p3:catch(err_cb); |
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152 |
assert.spy(cb).was_called(0); |
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153 |
assert.spy(err_cb).was_called(0); |
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154 |
r("oh doh"); |
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155 |
assert.spy(cb).was_called(0); |
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156 |
assert.spy(err_cb).was_called(1); |
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157 |
assert.spy(err_cb).was_called_with("oh doh"); |
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158 |
assert.equal("oh doh", result); |
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159 |
end); |
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160 |
|
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161 |
it("propagates values down the chain, even when some handlers are not provided", function () |
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162 |
local r; |
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163 |
local p = promise.new(function (resolve, reject) |
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164 |
r = resolve; |
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165 |
end); |
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166 |
local cb = spy.new(function () end); |
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167 |
local err_cb = spy.new(function () end); |
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168 |
local p2 = p:next(function (v) return v; end); |
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169 |
local p3 = p2:catch(err_cb) |
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170 |
p3:next(cb); |
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171 |
assert.spy(cb).was_called(0); |
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172 |
assert.spy(err_cb).was_called(0); |
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173 |
r(1337); |
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174 |
assert.spy(cb).was_called(1); |
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175 |
assert.spy(cb).was_called_with(1337); |
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176 |
assert.spy(err_cb).was_called(0); |
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177 |
end); |
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178 |
|
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179 |
it("fulfilled promises do not call error handlers and do propagate value", function () |
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180 |
local p = promise.resolve("foo"); |
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181 |
local cb = spy.new(function () end); |
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182 |
local p2 = p:catch(cb); |
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183 |
assert.spy(cb).was_called(0); |
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184 |
|
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185 |
local cb2 = spy.new(function () end); |
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186 |
p2:catch(cb2); |
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187 |
assert.spy(cb2).was_called(0); |
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188 |
end); |
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189 |
|
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190 |
it("rejected promises do not call fulfilled handlers and do propagate reason", function () |
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191 |
local p = promise.reject("foo"); |
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192 |
local cb = spy.new(function () end); |
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193 |
local p2 = p:next(cb); |
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194 |
assert.spy(cb).was_called(0); |
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195 |
|
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196 |
local cb2 = spy.new(function () end); |
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197 |
local cb2_err = spy.new(function () end); |
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198 |
p2:next(cb2, cb2_err); |
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199 |
assert.spy(cb2).was_called(0); |
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200 |
assert.spy(cb2_err).was_called(1); |
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201 |
assert.spy(cb2_err).was_called_with("foo"); |
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202 |
end); |
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203 |
|
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204 |
describe("allows callbacks to return", function () |
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205 |
it("pending promises", function () |
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206 |
local r; |
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207 |
local p = promise.resolve() |
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208 |
local cb = spy.new(function () |
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209 |
return promise.new(function (resolve) |
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210 |
r = resolve; |
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211 |
end); |
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212 |
end); |
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213 |
local cb2 = spy.new(function () end); |
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214 |
p:next(cb):next(cb2); |
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215 |
assert.spy(cb).was_called(1); |
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216 |
assert.spy(cb2).was_called(0); |
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217 |
r("hello"); |
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218 |
assert.spy(cb).was_called(1); |
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219 |
assert.spy(cb2).was_called(1); |
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220 |
assert.spy(cb2).was_called_with("hello"); |
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221 |
end); |
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222 |
|
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223 |
it("resolved promises", function () |
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224 |
local p = promise.resolve() |
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225 |
local cb = spy.new(function () |
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226 |
return promise.resolve("hello"); |
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227 |
end); |
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228 |
local cb2 = spy.new(function () end); |
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229 |
p:next(cb):next(cb2); |
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230 |
assert.spy(cb).was_called(1); |
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assert.spy(cb2).was_called(1); |
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assert.spy(cb2).was_called_with("hello"); |
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end); |
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|
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it("rejected promises", function () |
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local p = promise.resolve() |
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local cb = spy.new(function () |
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return promise.reject("hello"); |
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end); |
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local cb2 = spy.new(function () |
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return promise.reject("goodbye"); |
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end); |
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local cb3 = spy.new(function () end); |
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p:next(cb):catch(cb2):catch(cb3); |
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assert.spy(cb).was_called(1); |
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assert.spy(cb2).was_called(1); |
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assert.spy(cb2).was_called_with("hello"); |
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assert.spy(cb3).was_called(1); |
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assert.spy(cb3).was_called_with("goodbye"); |
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end); |
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end); |
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252 |
|
9459
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describe("race()", function () |
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it("works with fulfilled promises", function () |
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local p1, p2 = promise.resolve("yep"), promise.resolve("nope"); |
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local p = promise.race({ p1, p2 }); |
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local result; |
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p:next(function (v) |
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result = v; |
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end); |
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assert.equal("yep", result); |
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end); |
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it("works with pending promises", function () |
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local r1, r2; |
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local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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local p = promise.race({ p1, p2 }); |
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267 |
|
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local result; |
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local cb = spy.new(function (v) |
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result = v; |
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end); |
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p:next(cb); |
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assert.spy(cb).was_called(0); |
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r2("yep"); |
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r1("nope"); |
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assert.spy(cb).was_called(1); |
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assert.equal("yep", result); |
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end); |
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end); |
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describe("all()", function () |
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it("works with fulfilled promises", function () |
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282 |
local p1, p2 = promise.resolve("yep"), promise.resolve("nope"); |
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local p = promise.all({ p1, p2 }); |
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284 |
local result; |
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p:next(function (v) |
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286 |
result = v; |
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287 |
end); |
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assert.same({ "yep", "nope" }, result); |
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289 |
end); |
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290 |
it("works with pending promises", function () |
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291 |
local r1, r2; |
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292 |
local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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local p = promise.all({ p1, p2 }); |
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294 |
|
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295 |
local result; |
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296 |
local cb = spy.new(function (v) |
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297 |
result = v; |
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298 |
end); |
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299 |
p:next(cb); |
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300 |
assert.spy(cb).was_called(0); |
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301 |
r2("yep"); |
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302 |
assert.spy(cb).was_called(0); |
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303 |
r1("nope"); |
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304 |
assert.spy(cb).was_called(1); |
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305 |
assert.same({ "nope", "yep" }, result); |
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306 |
end); |
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307 |
it("rejects if any promise rejects", function () |
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308 |
local r1, r2; |
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309 |
local p1 = promise.new(function (resolve, reject) r1 = reject end); |
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310 |
local p2 = promise.new(function (resolve, reject) r2 = reject end); |
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311 |
local p = promise.all({ p1, p2 }); |
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312 |
|
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313 |
local result; |
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314 |
local cb = spy.new(function (v) |
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315 |
result = v; |
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316 |
end); |
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317 |
local cb_err = spy.new(function (v) |
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318 |
result = v; |
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319 |
end); |
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320 |
p:next(cb, cb_err); |
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|
321 |
assert.spy(cb).was_called(0); |
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322 |
assert.spy(cb_err).was_called(0); |
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|
323 |
r2("fail"); |
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|
324 |
assert.spy(cb).was_called(0); |
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325 |
assert.spy(cb_err).was_called(1); |
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|
326 |
r1("nope"); |
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|
327 |
assert.spy(cb).was_called(0); |
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|
328 |
assert.spy(cb_err).was_called(1); |
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|
329 |
assert.equal("fail", result); |
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|
330 |
end); |
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|
331 |
end); |
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|
332 |
describe("catch()", function () |
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|
333 |
it("works", function () |
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|
334 |
local result; |
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|
335 |
local p = promise.new(function (resolve) |
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|
336 |
error({ foo = true }); |
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|
337 |
end); |
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|
338 |
local cb1 = spy.new(function (v) |
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|
339 |
result = v; |
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|
340 |
end); |
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|
341 |
assert.spy(cb1).was_called(0); |
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|
342 |
p:catch(cb1); |
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|
343 |
assert.spy(cb1).was_called(1); |
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|
344 |
assert.same({ foo = true }, result); |
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|
345 |
end); |
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|
346 |
end); |
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|
347 |
it("promises may be resolved by other promises", function () |
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|
348 |
local r1, r2; |
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|
349 |
local p1, p2 = promise.new(function (resolve) r1 = resolve end), promise.new(function (resolve) r2 = resolve end); |
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|
350 |
|
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|
351 |
local result; |
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|
352 |
local cb = spy.new(function (v) |
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|
353 |
result = v; |
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parents:
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|
354 |
end); |
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parents:
diff
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|
355 |
p1:next(cb); |
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util.promise: ES6-like API for promises
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parents:
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|
356 |
assert.spy(cb).was_called(0); |
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util.promise: ES6-like API for promises
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parents:
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changeset
|
357 |
|
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|
358 |
r1(p2); |
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util.promise: ES6-like API for promises
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parents:
diff
changeset
|
359 |
assert.spy(cb).was_called(0); |
d54a0e129af8
util.promise: ES6-like API for promises
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parents:
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|
360 |
r2("yep"); |
d54a0e129af8
util.promise: ES6-like API for promises
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parents:
diff
changeset
|
361 |
assert.spy(cb).was_called(1); |
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util.promise: ES6-like API for promises
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parents:
diff
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|
362 |
assert.equal("yep", result); |
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util.promise: ES6-like API for promises
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parents:
diff
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|
363 |
end); |
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util.promise: ES6-like API for promises
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parents:
diff
changeset
|
364 |
describe("reject()", function () |
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util.promise: ES6-like API for promises
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parents:
diff
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|
365 |
it("returns a rejected promise", function () |
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parents:
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|
366 |
local p = promise.reject("foo"); |
9460
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util.promise tests: Fix luacheck warnings
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|
367 |
local cb = spy.new(function () end); |
9513
8ef46d09386a
util.promise: Fix promise.reject() to return a rejected promise, and fix buggy test for it
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|
368 |
p:catch(cb); |
9459
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parents:
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|
369 |
assert.spy(cb).was_called(1); |
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util.promise: ES6-like API for promises
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parents:
diff
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|
370 |
assert.spy(cb).was_called_with("foo"); |
d54a0e129af8
util.promise: ES6-like API for promises
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parents:
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changeset
|
371 |
end); |
9514
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util.promise: Add additional test for promise.reject()
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|
372 |
it("returns a rejected promise and does not call on_fulfilled", function () |
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|
373 |
local p = promise.reject("foo"); |
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|
374 |
local cb = spy.new(function () end); |
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|
375 |
p:next(cb); |
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util.promise: Add additional test for promise.reject()
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|
376 |
assert.spy(cb).was_called(0); |
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util.promise: Add additional test for promise.reject()
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|
377 |
end); |
9459
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util.promise: ES6-like API for promises
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|
378 |
end); |
9517
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|
379 |
describe("finally()", function () |
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|
380 |
local p, p2, resolve, reject, on_finally; |
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util.promise: Add promise:finally()
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|
381 |
before_each(function () |
9db707a86a25
util.promise: Add promise:finally()
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|
382 |
p = promise.new(function (_resolve, _reject) |
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|
383 |
resolve, reject = _resolve, _reject; |
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|
384 |
end); |
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|
385 |
on_finally = spy.new(function () end); |
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|
386 |
p2 = p:finally(on_finally); |
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|
387 |
end); |
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|
388 |
it("runs when a promise is resolved", function () |
9db707a86a25
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diff
changeset
|
389 |
assert.spy(on_finally).was_called(0); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
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|
390 |
resolve("foo"); |
9db707a86a25
util.promise: Add promise:finally()
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diff
changeset
|
391 |
assert.spy(on_finally).was_called(1); |
9db707a86a25
util.promise: Add promise:finally()
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|
392 |
assert.spy(on_finally).was_not_called_with("foo"); |
9db707a86a25
util.promise: Add promise:finally()
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diff
changeset
|
393 |
end); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
394 |
it("runs when a promise is rejected", function () |
9db707a86a25
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parents:
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diff
changeset
|
395 |
assert.spy(on_finally).was_called(0); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
396 |
reject("foo"); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
397 |
assert.spy(on_finally).was_called(1); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
398 |
assert.spy(on_finally).was_not_called_with("foo"); |
9db707a86a25
util.promise: Add promise:finally()
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diff
changeset
|
399 |
end); |
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parents:
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diff
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|
400 |
it("returns a promise that fulfills with the original value", function () |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
401 |
local cb2 = spy.new(function () end); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
402 |
p2:next(cb2); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
403 |
assert.spy(on_finally).was_called(0); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
404 |
assert.spy(cb2).was_called(0); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
405 |
resolve("foo"); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
406 |
assert.spy(on_finally).was_called(1); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
407 |
assert.spy(cb2).was_called(1); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
408 |
assert.spy(on_finally).was_not_called_with("foo"); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
409 |
assert.spy(cb2).was_called_with("foo"); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
410 |
end); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
411 |
it("returns a promise that rejects with the original error", function () |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
412 |
local on_finally_err = spy.new(function () end); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
413 |
local on_finally_ok = spy.new(function () end); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
414 |
p2:catch(on_finally_err); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
415 |
p2:next(on_finally_ok); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
416 |
assert.spy(on_finally).was_called(0); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
417 |
assert.spy(on_finally_err).was_called(0); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
418 |
reject("foo"); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
419 |
assert.spy(on_finally).was_called(1); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
420 |
-- Since the original promise was rejected, the finally promise should also be |
9db707a86a25
util.promise: Add promise:finally()
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parents:
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diff
changeset
|
421 |
assert.spy(on_finally_ok).was_called(0); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
422 |
assert.spy(on_finally_err).was_called(1); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
423 |
assert.spy(on_finally).was_not_called_with("foo"); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
424 |
assert.spy(on_finally_err).was_called_with("foo"); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
425 |
end); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
426 |
it("returns a promise that rejects with an uncaught error inside on_finally", function () |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
427 |
p = promise.new(function (_resolve, _reject) |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
428 |
resolve, reject = _resolve, _reject; |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
429 |
end); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
430 |
local test_error = {}; |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
431 |
on_finally = spy.new(function () error(test_error) end); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
432 |
p2 = p:finally(on_finally); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
433 |
|
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
434 |
local on_finally_err = spy.new(function () end); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
435 |
p2:catch(on_finally_err); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
436 |
assert.spy(on_finally).was_called(0); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
437 |
assert.spy(on_finally_err).was_called(0); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
438 |
reject("foo"); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
439 |
assert.spy(on_finally).was_called(1); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
440 |
assert.spy(on_finally_err).was_called(1); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
441 |
assert.spy(on_finally).was_not_called_with("foo"); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
442 |
assert.spy(on_finally).was_not_called_with(test_error); |
9db707a86a25
util.promise: Add promise:finally()
Matthew Wild <mwild1@gmail.com>
parents:
9514
diff
changeset
|
443 |
assert.spy(on_finally_err).was_called_with(test_error); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
444 |
end); |
9db707a86a25
util.promise: Add promise:finally()
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parents:
9514
diff
changeset
|
445 |
end); |
9520
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
446 |
describe("try()", function () |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
447 |
it("works with functions that return a promise", function () |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
448 |
local resolve; |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
449 |
local p = promise.try(function () |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
450 |
return promise.new(function (_resolve) |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
451 |
resolve = _resolve; |
b1c6ede17592
util.promise: Add promise.try()
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parents:
9517
diff
changeset
|
452 |
end); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
9517
diff
changeset
|
453 |
end); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
454 |
assert.is_function(resolve); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
455 |
local on_resolved = spy.new(function () end); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
456 |
p:next(on_resolved); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
9517
diff
changeset
|
457 |
assert.spy(on_resolved).was_not_called(); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
9517
diff
changeset
|
458 |
resolve("foo"); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
9517
diff
changeset
|
459 |
assert.spy(on_resolved).was_called_with("foo"); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
9517
diff
changeset
|
460 |
end); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
9517
diff
changeset
|
461 |
|
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
462 |
it("works with functions that return a value", function () |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
463 |
local p = promise.try(function () |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
464 |
return "foo"; |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
465 |
end); |
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466 |
local on_resolved = spy.new(function () end); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
467 |
p:next(on_resolved); |
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util.promise: Add promise.try()
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parents:
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changeset
|
468 |
assert.spy(on_resolved).was_called_with("foo"); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
469 |
end); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
470 |
|
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
471 |
it("works with functions that return a promise that rejects", function () |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
472 |
local reject; |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
473 |
local p = promise.try(function () |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
474 |
return promise.new(function (_, _reject) |
b1c6ede17592
util.promise: Add promise.try()
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changeset
|
475 |
reject = _reject; |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
476 |
end); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
477 |
end); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
478 |
assert.is_function(reject); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
479 |
local on_rejected = spy.new(function () end); |
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util.promise: Add promise.try()
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parents:
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changeset
|
480 |
p:catch(on_rejected); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
481 |
assert.spy(on_rejected).was_not_called(); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
482 |
reject("foo"); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
483 |
assert.spy(on_rejected).was_called_with("foo"); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
484 |
end); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
485 |
|
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
486 |
it("works with functions that throw errors", function () |
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util.promise: Add promise.try()
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parents:
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changeset
|
487 |
local test_error = {}; |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
488 |
local p = promise.try(function () |
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util.promise: Add promise.try()
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parents:
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changeset
|
489 |
error(test_error); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
490 |
end); |
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util.promise: Add promise.try()
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parents:
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changeset
|
491 |
local on_rejected = spy.new(function () end); |
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util.promise: Add promise.try()
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parents:
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diff
changeset
|
492 |
p:catch(on_rejected); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
493 |
assert.spy(on_rejected).was_called(1); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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diff
changeset
|
494 |
assert.spy(on_rejected).was_called_with(test_error); |
b1c6ede17592
util.promise: Add promise.try()
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parents:
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changeset
|
495 |
end); |
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util.promise: Add promise.try()
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parents:
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changeset
|
496 |
end); |
9459
d54a0e129af8
util.promise: ES6-like API for promises
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diff
changeset
|
497 |
end); |