Design Driven Testing: Test Smarter, Not Harder by Doug Rosenberg, Matt Stephens

By Doug Rosenberg, Matt Stephens

Design pushed checking out: try Smarter, no longer Harder
Publisher: Apress 2010 | three hundred Pages | ISBN: 1430229438 | writer: Apress | PDF | 15 MB

The groundbreaking publication layout pushed trying out brings sanity again to the software program improvement approach via flipping round the proposal of try out pushed improvement (TDD)—restoring the concept that of utilizing checking out to make sure a layout rather than pretending that unit checks are a substitute for layout. someone who feels that TDD is “Too rattling Difficult” will take pleasure in this book.
Design pushed checking out indicates that, by way of combining a forward-thinking improvement procedure with state-of-the-art automation, checking out could be a finely unique, business-driven, lucrative attempt. In different phrases, you’ll attempt smarter, now not harder.
Applies a feedback-driven method of each one degree of the venture lifecycle.
Illustrates a light-weight and powerful procedure utilizing a middle subset of UML.
Follows a real-life instance undertaking utilizing Java and Flex/ActionScript.
Presents bonus chapters for complicated DDTers protecting unit-test antipatterns (and their contrary, “test-conscious” layout patterns), and displaying tips to create your individual attempt transformation templates in company Architect.

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Extra info for Design Driven Testing: Test Smarter, Not Harder

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For this reason, we generally go to great lengths to keep the unit-tested code insular. Figure 2–6 shows one way this could be done. In the sequence diagram, LoginManager checks whether it’s running in the “live” environment or a unit-test/mock environment. If the former, it calls the real SSO service; if the latter, it calls a mock version. 30 CHAPTER 2 ■ TDD USING HELLO WORLD Figure 2–6. A common anti-pattern: the code branches depending on which environment it’s in. Yikes. This would quickly become a nightmare of “if-else if” statements that check whether this is a live or test environment.

DDT “acceptance tests” (which encompass both scenario tests and business requirement tests) are “manual” test specs for consumption by a human. Scenario tests can be automated (and we recommend doing this if at all possible), but the process doesn’t depend on it. 6 With the test-first approach, you pick a story card from the wall, discuss the success criteria on the back of the card with the tester and/or customer representative, write the first (failing) test, write some code to make the test pass, write the next test, and so on, until the story card is implemented.

It would make sense to create a “workhorse” method and move the hairy plumbing code—setting the test case’s expectations and calling LoginManager—into there. This is really just a case of moving code around, but, as you’ll see, it makes a big difference to the test class’s readability. Actually, we end up with two new methods: expectLoginSuccess() and expectLoginFailure(). class ) public void invalidLogin() throws Exception { expectLoginFailure("wideboy", "blagger1"); } All of a sudden, each test case looks very focused on purely the test values, without any of the plumbing code hiding the purpose or expectations of the test case.

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