TDD in Objective-C

Transcript

1. TEST DRIVEN DEVELOPMENT IN OBJECTIVE-C
2. WHY Confidence Emergent Design
3. TOOLS XCTest - testing framework Stubble - mocking framework KIF - integration testing framework Fox - property based testing framework
4. RULES 1. Write new code when a unit test fails (mostly) 2. Eliminate duplication
5. STEPS TO CREATING A CLASS USING TDD 1. Analysis 2. Write Test 3. Implement 4. Improve
6. THOUGHTS TO KEEP IN MIND Red/Green/Refactor Trivial Implementation Triangulation
7. TEST DOUBLES ▸ Dummy objects are passed around but never actually used. ▸ Fake objects actually have working implementations, but usually take some shortcut ▸ Stubs provide canned answers to calls made during the test, may also record information about calls ▸ Mocks are objects pre-programmed with expectations, form a specification of the calls they are expected to receive.
8. XCTEST REFERENCE #import <XCTest/XCTest.h> #import “TDDStack.h” @interface TDDStackTest : XCTestCase @end @implementation TDDStackTest -(void)setUp { ... } /* optional */ -(void)tearDown { ... } /* optional */ -(void)testEmptyAtCreation { TDDStack *stack = [[TDDStack alloc] init]; XCTAssertTrue(stack.isEmpty, @”Not Empty!”); } @end
9. DEMO
10. RESOURCES http://martinfowler.com/bliki http://www.testdriven.com https://github.com/kartikpatel/asciiwwdciPhoneApp.git https://github.com/kartikpatel/asciiwwdc.com.git