Testing & Type Testing in TypeScript

65 lessons in TypeScript

• Naive Equals Type HelperCode Quiz
• Typing Mock FunctionsFlashcard
• Typing Test Fixtures and Mock DataSlides / Video
• Testing Utility and Generic TypesSlides / Video
• Testing Async Code with Typed PromisesSlides / Video
• Typing Assertion Libraries and Custom MatchersSlides / Video
• Type Coverage ToolsSlides / Video
• The @ts-expect-error DirectiveSlides / Video
• Type Testing with dtslint & expect-typeSlides / Video
• Type Testing with tsdSlides / Video
• Asserting Types with expectTypeOfSlides / Video
• What Type Testing IsSlides / Video
• Runtime vs Compile-time Test VerificationSlides / Video
• Mocking Modules with Type SafetySlides / Video
• Typing Mocks with jest.MockedSlides / Video
• Writing Typed Unit TestsSlides / Video
• Configuring tsconfig for Test EnvironmentsSlides / Video
• Setting Up Vitest for TypeScriptSlides / Video
• Setting Up Jest with ts-jestSlides / Video
• Why TypeScript Testing DiffersSlides / Video
• Type Tests vs Runtime TestsQuiz
• dtslint for Declaration TestingQuiz
• Type-Safe Spies and Partial MocksQuiz
• Testing never and any BehaviorsQuiz
• Testing Function Return TypesQuiz
• Assignability vs Exact EqualityQuiz
• Exact Type Equality CheckQuiz
• Vitest expectTypeOf APIQuiz
• expect-type AssertionsQuiz
• tsd Type Testing LibraryQuiz
• Expect/Equal Helper TypesQuiz
• Typing Assertion LibrariesQuiz
• @types Packages for Test FrameworksQuiz
• Typing Test Fixtures and HelpersQuiz
• Typing Mocks with jest.MockedQuiz
• Testing Conditional & Mapped TypesQuiz
• Testing Function Parameter TypesQuiz
• Typing a Promise-Returning MockCode Quiz
• Exhaustiveness never AssertionCode Quiz
• Negative Type Test With ts-ignoreCode Quiz
• Type Check Instead of Runtime TestCode Quiz
• Factory Spread Override OrderCode Quiz
• jest.Mocked Without jest.mockCode Quiz
• jest.fn Generic Return TypeCode Quiz
• toBe vs toEqual on ObjectsCode Quiz
• Awaiting Async Promise AssertionsCode Quiz
• ReturnType Given a ValueCode Quiz
• Uncalled expectTypeOf MatcherCode Quiz
• Reversed Assignability CheckCode Quiz
• expectError on a Valid CallCode Quiz
• expectType with tsd AssertionsCode Quiz
• Unused @ts-expect-error DirectiveCode Quiz
• Typed Spies and jest.Mocked<T>Flashcard
• Organizing Tests in .test-d.ts FilesFlashcard
• dtslint for Declaration File TestingFlashcard
• expect-type Library AssertionsFlashcard
• Type-Safe Test Fixtures and FactoriesFlashcard
• Runtime vs Type-Level TestingFlashcard
• Assignability vs Exact EqualityFlashcard
• The tsd LibraryFlashcard
• Typing Custom Matchers/AssertionsFlashcard
• Typing Setup and Teardown HooksFlashcard
• Typing Test Assertions in Jest/VitestFlashcard
• Type-Level Equality AssertionsFlashcard
• Testing Compile Errors as ExpectedFlashcard