How to Safely Parse JSON into Swift Immutable Models with TDD | Quality Coding

func test_parseJSON() { let json = // Read JSON saved in external file let actual = Model.parse(json) let expected = Model( // Define each field, including each subcomponent, // to match the JSON ) XCTAssertEqual(actual, expected) } This may be a fine acceptance test. But we can do better for unit testing. Here are the things I find problematic: Large, often externalized input. I discuss this at t