iOS Unit Testing by Example

Test Attributes and Wrangle UIKit Descriptions

Next, let’s add a test to confirm the attributes of the username text field. But testing every single attribute is overkill. Let’s only test the attributes we changed from their default settings. Add a test named test_usernameField_attributesShouldBeSet. Copy and paste the content of the outlet test, except for its assertions. Then add the following assertions and run the tests:

TextField/TextFieldTests/ViewControllerTests.swift

let textField = sut.usernameField!
XCTAssertEqual(textField.textContentType, .username, "textContentType")
XCTAssertEqual(textField.autocorrectionType, .no, "autocorrectionType")
XCTAssertEqual(textField.returnKeyType, .next, "returnKeyType")

The tests ...