forked from rojo-rbx/rojo
Delete Promise.spec.lua
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Lucien Greathouse
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GitHub
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commit
ce5fe00a66
@@ -1,262 +0,0 @@
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return function()
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local Promise = require(script.Parent.Promise)
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describe("Promise.new", function()
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it("should instantiate with a callback", function()
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local promise = Promise.new(function() end)
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expect(promise).to.be.ok()
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end)
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it("should invoke the given callback with resolve and reject", function()
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local callCount = 0
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local resolveArg
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local rejectArg
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local promise = Promise.new(function(resolve, reject)
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callCount = callCount + 1
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resolveArg = resolve
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rejectArg = reject
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end)
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expect(promise).to.be.ok()
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expect(callCount).to.equal(1)
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expect(resolveArg).to.be.a("function")
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expect(rejectArg).to.be.a("function")
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expect(promise._status).to.equal(Promise.Status.Started)
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end)
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it("should resolve promises on resolve()", function()
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local callCount = 0
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local promise = Promise.new(function(resolve)
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callCount = callCount + 1
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resolve()
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end)
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expect(promise).to.be.ok()
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expect(callCount).to.equal(1)
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expect(promise._status).to.equal(Promise.Status.Resolved)
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end)
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it("should reject promises on reject()", function()
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local callCount = 0
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local promise = Promise.new(function(resolve, reject)
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callCount = callCount + 1
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reject()
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end)
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expect(promise).to.be.ok()
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expect(callCount).to.equal(1)
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expect(promise._status).to.equal(Promise.Status.Rejected)
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end)
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it("should reject on error in callback", function()
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local callCount = 0
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local promise = Promise.new(function()
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callCount = callCount + 1
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error("hahah")
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end)
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expect(promise).to.be.ok()
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expect(callCount).to.equal(1)
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expect(promise._status).to.equal(Promise.Status.Rejected)
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expect(promise._value[1]:find("hahah")).to.be.ok()
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end)
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end)
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describe("Promise.resolve", function()
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it("should immediately resolve with a value", function()
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local promise = Promise.resolve(5)
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expect(promise).to.be.ok()
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expect(promise._status).to.equal(Promise.Status.Resolved)
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expect(promise._value[1]).to.equal(5)
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end)
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it("should chain onto passed promises", function()
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local promise = Promise.resolve(Promise.new(function(_, reject)
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reject(7)
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end))
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expect(promise).to.be.ok()
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expect(promise._status).to.equal(Promise.Status.Rejected)
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expect(promise._value[1]).to.equal(7)
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end)
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end)
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describe("Promise.reject", function()
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it("should immediately reject with a value", function()
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local promise = Promise.reject(6)
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expect(promise).to.be.ok()
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expect(promise._status).to.equal(Promise.Status.Rejected)
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expect(promise._value[1]).to.equal(6)
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end)
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it("should pass a promise as-is as an error", function()
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local innerPromise = Promise.new(function(resolve)
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resolve(6)
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end)
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local promise = Promise.reject(innerPromise)
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expect(promise).to.be.ok()
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expect(promise._status).to.equal(Promise.Status.Rejected)
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expect(promise._value[1]).to.equal(innerPromise)
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end)
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end)
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describe("Promise:andThen", function()
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it("should chain onto resolved promises", function()
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local args
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local argsLength
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local callCount = 0
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local badCallCount = 0
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local promise = Promise.resolve(5)
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local chained = promise
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:andThen(function(...)
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args = {...}
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argsLength = select("#", ...)
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callCount = callCount + 1
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end, function()
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badCallCount = badCallCount + 1
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end)
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expect(badCallCount).to.equal(0)
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expect(callCount).to.equal(1)
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expect(argsLength).to.equal(1)
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expect(args[1]).to.equal(5)
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expect(promise).to.be.ok()
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expect(promise._status).to.equal(Promise.Status.Resolved)
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expect(promise._value[1]).to.equal(5)
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expect(chained).to.be.ok()
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expect(chained).never.to.equal(promise)
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expect(chained._status).to.equal(Promise.Status.Resolved)
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expect(#chained._value).to.equal(0)
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end)
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it("should chain onto rejected promises", function()
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local args
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local argsLength
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local callCount = 0
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local badCallCount = 0
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local promise = Promise.reject(5)
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local chained = promise
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:andThen(function(...)
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badCallCount = badCallCount + 1
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end, function(...)
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args = {...}
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argsLength = select("#", ...)
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callCount = callCount + 1
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end)
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expect(badCallCount).to.equal(0)
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expect(callCount).to.equal(1)
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expect(argsLength).to.equal(1)
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expect(args[1]).to.equal(5)
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expect(promise).to.be.ok()
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expect(promise._status).to.equal(Promise.Status.Rejected)
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expect(promise._value[1]).to.equal(5)
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expect(chained).to.be.ok()
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expect(chained).never.to.equal(promise)
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expect(chained._status).to.equal(Promise.Status.Resolved)
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expect(#chained._value).to.equal(0)
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end)
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it("should chain onto asynchronously resolved promises", function()
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local args
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local argsLength
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local callCount = 0
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local badCallCount = 0
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local startResolution
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local promise = Promise.new(function(resolve)
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startResolution = resolve
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end)
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local chained = promise
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:andThen(function(...)
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args = {...}
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argsLength = select("#", ...)
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callCount = callCount + 1
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end, function()
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badCallCount = badCallCount + 1
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end)
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expect(callCount).to.equal(0)
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expect(badCallCount).to.equal(0)
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startResolution(6)
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expect(badCallCount).to.equal(0)
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expect(callCount).to.equal(1)
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expect(argsLength).to.equal(1)
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expect(args[1]).to.equal(6)
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expect(promise).to.be.ok()
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expect(promise._status).to.equal(Promise.Status.Resolved)
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expect(promise._value[1]).to.equal(6)
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expect(chained).to.be.ok()
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expect(chained).never.to.equal(promise)
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expect(chained._status).to.equal(Promise.Status.Resolved)
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expect(#chained._value).to.equal(0)
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end)
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it("should chain onto asynchronously rejected promises", function()
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local args
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local argsLength
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local callCount = 0
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local badCallCount = 0
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local startResolution
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local promise = Promise.new(function(_, reject)
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startResolution = reject
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end)
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local chained = promise
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:andThen(function()
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badCallCount = badCallCount + 1
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end, function(...)
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args = {...}
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argsLength = select("#", ...)
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callCount = callCount + 1
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end)
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expect(callCount).to.equal(0)
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expect(badCallCount).to.equal(0)
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startResolution(6)
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expect(badCallCount).to.equal(0)
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expect(callCount).to.equal(1)
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expect(argsLength).to.equal(1)
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expect(args[1]).to.equal(6)
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expect(promise).to.be.ok()
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expect(promise._status).to.equal(Promise.Status.Rejected)
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expect(promise._value[1]).to.equal(6)
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expect(chained).to.be.ok()
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expect(chained).never.to.equal(promise)
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expect(chained._status).to.equal(Promise.Status.Resolved)
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expect(#chained._value).to.equal(0)
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end)
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end)
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end
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