Download Eclatantes perles de cristal: Des bijoux d'exception a faire by Christine Hooghe, Sylvie Hooghe PDF

By Christine Hooghe, Sylvie Hooghe

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The idea is very simple. xml in your output directory (by default, test-output/). xml with only the methods that failed. Consider the test in Listing 2–8, which contains two methods that fail. Listing 2–8 Example of failing tests public class FailedTest { @Test public void depend() { } Testing for Failures 33 @Test(dependsOnMethods = "depend") public void f() { throw new RuntimeException(); } @Test public void failed() { throw new RuntimeException(); } } When we run this test, we get the output shown in Listing 2–9.

This page intentionally left blank C H A P T E R 2 Testing Design Patterns While we are all very familiar with general object-oriented design patterns, testing design patterns are not nearly as well understood or prevalent because the mechanics of writing tests is easy, and almost any testing framework we use is likely to be fairly simple and easy to understand. More interesting than just writing tests, however, is writing tests that will stand the test of time, tests that will handle future requirements and changes, ones that can be easily maintained by any new developers who might join the team or take over the code base.

Public Confirmation bookPlane(ItineraryRequest itinerary, SeatRequest seat) throws ReservationException; Listing 2–2 shows a first attempt at making sure that an exception is thrown if we try to make a reservation on a plane that is full. bookPlane(createValidItinerary(), null); fail("The reservation should have failed"); } catch(ReservationException ex) { // success, do nothing: the test will pass } } This is a traditional testing design pattern that has been made popular by JUnit 3, and while it works, its reverse logic (“pass if an exception is thrown, fail when all goes well”) makes the code a bit harder to read than it should be.

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