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- TestNG: As testing framework. We decided to move from junit to testNG some years ago when junit seemed to be stuck
- Mockito: To allow easy mock-based testing.
- Hamcrest: To allow to read the asserts in a human-understandable way.
Testing a spring-based service or standard Java class
Actually this is the situation that you very often will write unit tests. You created or extended a service and want to ensure that it is working. So this is what you want to do:
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public class ReflectionCacheTest extends AbstractLogSupportTestBase { /** Class under test. */ @InjectMocks ReflectionCache cache; /** Tests for the {@link ReflectionCache#invokeMethod(Class, String, Class[], Object, Object[], Object)} method. */ public static class InvokeMethod extends ReflectionCacheTest { @Test public void normalUsage() { String testString = "I am a test"; String result = (String) cache.invokeMethod(String.class, "toString", testString, null, null); assertThat(result, is(testString)); } @Test public void multipleInvocationOnSameObject() { ... test method content ... } @Test public void methodWithParameter() { ... test method content ... } ... more test methods ... } } |
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- The class under test should be marked with @InjectMocks even if now @Mock no @Mock fields are going to be injected. This is because before every test method execution, this field will be reset.
- The inner class has to extend the outer test class. This is needed to access the in this example the cache field.