Make tests compatible with TestEZ, provide 'runTests' script

plugin/src/Promise.spec.lua

@@ -0,0 +1,70 @@
+return function()
+	local Promise = require(script.Parent.Promise)
+
+	describe("Promise.new", function()
+		it("should instantiate with a callback", function()
+			local promise = Promise.new(function() end)
+
+			expect(promise).to.be.ok()
+		end)
+
+		it("should invoke the given callback with resolve and reject", function()
+			local callCount = 0
+			local resolveArg
+			local rejectArg
+
+			local promise = Promise.new(function(resolve, reject)
+				callCount = callCount + 1
+				resolveArg = resolve
+				rejectArg = reject
+			end)
+
+			expect(promise).to.be.ok()
+
+			expect(callCount).to.equal(1)
+			expect(resolveArg).to.be.a("function")
+			expect(rejectArg).to.be.a("function")
+			expect(promise._status).to.equal(Promise.Status.Started)
+		end)
+
+		it("should resolve promises on resolve()", function()
+			local callCount = 0
+
+			local promise = Promise.new(function(resolve)
+				callCount = callCount + 1
+				resolve()
+			end)
+
+			expect(promise).to.be.ok()
+			expect(callCount).to.equal(1)
+			expect(promise._status).to.equal(Promise.Status.Resolved)
+		end)
+
+		it("should reject promises on reject()", function()
+			local callCount = 0
+
+			local promise = Promise.new(function(resolve, reject)
+				callCount = callCount + 1
+				reject()
+			end)
+
+			expect(promise).to.be.ok()
+			expect(callCount).to.equal(1)
+			expect(promise._status).to.equal(Promise.Status.Rejected)
+		end)
+
+		it("should reject on error in callback", function()
+			local callCount = 0
+
+			local promise = Promise.new(function()
+				callCount = callCount + 1
+				error("hahah")
+			end)
+
+			expect(promise).to.be.ok()
+			expect(callCount).to.equal(1)
+			expect(promise._status).to.equal(Promise.Status.Rejected)
+			expect(promise._value[1]:find("hahah")).to.be.ok()
+		end)
+	end)
+end