# HG changeset patch # User Matthew Wild # Date 1540542180 -3600 # Node ID d7fdd418adf8bf0375eb0f85e4b00c368e84bce9 # Parent e4c09e335bd9ed22cea4eb28d658046e0006f363 util.promise: Add tests ensuring returning a promise resolves the current promise with that promise diff -r e4c09e335bd9 -r d7fdd418adf8 spec/util_promise_spec.lua --- a/spec/util_promise_spec.lua Thu Oct 25 17:11:10 2018 +0200 +++ b/spec/util_promise_spec.lua Fri Oct 26 09:23:00 2018 +0100 @@ -201,6 +201,55 @@ assert.spy(cb2_err).was_called_with("foo"); end); + describe("allows callbacks to return", function () + it("pending promises", function () + local r; + local p = promise.resolve() + local cb = spy.new(function () + return promise.new(function (resolve) + r = resolve; + end); + end); + local cb2 = spy.new(function () end); + p:next(cb):next(cb2); + assert.spy(cb).was_called(1); + assert.spy(cb2).was_called(0); + r("hello"); + assert.spy(cb).was_called(1); + assert.spy(cb2).was_called(1); + assert.spy(cb2).was_called_with("hello"); + end); + + it("resolved promises", function () + local p = promise.resolve() + local cb = spy.new(function () + return promise.resolve("hello"); + end); + local cb2 = spy.new(function () end); + p:next(cb):next(cb2); + assert.spy(cb).was_called(1); + assert.spy(cb2).was_called(1); + assert.spy(cb2).was_called_with("hello"); + end); + + it("rejected promises", function () + local p = promise.resolve() + local cb = spy.new(function () + return promise.reject("hello"); + end); + local cb2 = spy.new(function () + return promise.reject("goodbye"); + end); + local cb3 = spy.new(function () end); + p:next(cb):catch(cb2):catch(cb3); + assert.spy(cb).was_called(1); + assert.spy(cb2).was_called(1); + assert.spy(cb2).was_called_with("hello"); + assert.spy(cb3).was_called(1); + assert.spy(cb3).was_called_with("goodbye"); + end); + end); + describe("race()", function () it("works with fulfilled promises", function () local p1, p2 = promise.resolve("yep"), promise.resolve("nope");