Examples of org.springframework.test.AssertThrows

org.springframework.test.AssertThrows
class under test public class Foo { public void someBusinessLogic(String name) { if (name == null) { throw new IllegalArgumentException("The 'name' argument is required"); } // rest of business logic here... } } The test for the above bad argument path can be expressed using the {@link AssertThrows} class like so:
```
 public class FooTest { public void testSomeBusinessLogicBadArgumentPath() { new AssertThrows(IllegalArgumentException.class) { public void test() { new Foo().someBusinessLogic(null); } }.runTest(); } }
```
This will result in the test passing if the Foo.someBusinessLogic(..) method threw an {@link java.lang.IllegalArgumentException}; if it did not, the test would fail with the following message:
```
 "Must have thrown a [class java.lang.IllegalArgumentException]"
```
If the wrong type of {@link java.lang.Exception} was thrown, thetest will also fail, this time with a message similar to the following:
```
 "junit.framework.AssertionFailedError: Was expecting a [class java.lang.UnsupportedOperationException] to be thrown, but instead a [class java.lang.IllegalArgumentException] was thrown"
```
The test for the correct {@link java.lang.Exception} respects polymorphism,so you can test that any old {@link java.lang.Exception} is thrown like so:
```
 public class FooTest { public void testSomeBusinessLogicBadArgumentPath() { // any Exception will do... new AssertThrows(Exception.class) { public void test() { new Foo().someBusinessLogic(null); } }.runTest(); } }
```
Intended for use with JUnit 4 and TestNG (as of Spring 3.0). You might want to compare this class with the {@link junit.extensions.ExceptionTestCase} class. @author Rick Evans @author Juergen Hoeller @since 2.0 @deprecated favor use of JUnit 4's {@code @Test(expected=...)} support


  public void testSetField() {
    final TestBeanSubclassWithNewField testBean = new TestBeanSubclassWithNewField();
    final Field field = ReflectionUtils.findField(TestBeanSubclassWithNewField.class, "name", String.class);


    new AssertThrows(IllegalStateException.class,
        "Calling setField() with on a private field without making it accessible should throw an IllegalStateException.") {


      public void test() throws Exception {
        ReflectionUtils.setField(field, testBean, "FooBar");
      }

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 * @author Rick Evans
 */
public class EventPublicationInterceptorTests extends TestCase {


  public void testWithNoApplicationEventClassSupplied() throws Exception {
    new AssertThrows(IllegalArgumentException.class) {
      public void test() throws Exception {
        EventPublicationInterceptor interceptor = new EventPublicationInterceptor();
        ApplicationContext ctx = new StaticApplicationContext();
        interceptor.setApplicationEventPublisher(ctx);
        interceptor.afterPropertiesSet();

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      }
    }.runTest();
  }


  public void testWithNonApplicationEventClassSupplied() throws Exception {
    new AssertThrows(IllegalArgumentException.class) {
      public void test() throws Exception {
        EventPublicationInterceptor interceptor = new EventPublicationInterceptor();
        ApplicationContext ctx = new StaticApplicationContext();
        interceptor.setApplicationEventPublisher(ctx);
        interceptor.setApplicationEventClass(getClass());

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      }
    }.runTest();
  }


  public void testWithAbstractStraightApplicationEventClassSupplied() throws Exception {
    new AssertThrows(IllegalArgumentException.class) {
      public void test() throws Exception {
        EventPublicationInterceptor interceptor = new EventPublicationInterceptor();
        ApplicationContext ctx = new StaticApplicationContext();
        interceptor.setApplicationEventPublisher(ctx);
        interceptor.setApplicationEventClass(ApplicationEvent.class);

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      }
    }.runTest();
  }


  public void testWithApplicationEventClassThatDoesntExposeAValidCtor() throws Exception {
    new AssertThrows(IllegalArgumentException.class) {
      public void test() throws Exception {
        EventPublicationInterceptor interceptor = new EventPublicationInterceptor();
        ApplicationContext ctx = new StaticApplicationContext();
        interceptor.setApplicationEventPublisher(ctx);
        interceptor.setApplicationEventClass(TestEventWithNoValidOneArgObjectCtor.class);

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    assertNotNull(string);
    assertEquals("bing", string);
  }


  public void testOneArgCtorWithNull() throws Exception {
    new AssertThrows(IllegalArgumentException.class, "Null model arguments added without a name being explicitly supplied are not allowed.") {
      public void test() throws Exception {
        new ModelMap(null);
      }
    }.runTest();
  }

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    // must not add if collection is empty...
    assertEquals(0, model.size());
  }


  public void testAddObjectWithNull() throws Exception {
    new AssertThrows(IllegalArgumentException.class, "Null model arguments added without a name being explicitly supplied are not allowed.") {
      public void test() throws Exception {
        ModelMap model = new ModelMap();
        model.addAttribute(null);
      }
    }.runTest();

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    model.addAllAttributes((Collection) null);
    assertEquals(0, model.size());
  }


  public void testAddAllObjectsWithSparseArrayList() throws Exception {
    new AssertThrows(IllegalArgumentException.class, "Null model arguments added without a name being explicitly supplied are not allowed.") {
      public void test() throws Exception {
        ModelMap model = new ModelMap();
        ArrayList list = new ArrayList();
        list.add("bing");
        list.add(null);

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    assertEquals(1, mc.getApplicationListeners().size());
    assertEquals(ArrayList.class, mc.getApplicationListeners().getClass());
  }


  public void testMulticasterInvalidCollectionClass_NotEvenACollectionType() {
    new AssertThrows(IllegalArgumentException.class) {
      public void test() throws Exception {
        AbstractApplicationEventMulticaster mc = getMulticaster();
        mc.setCollectionClass(ApplicationContextEventTests.class);
      }
    }.runTest();

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      }
    }.runTest();
  }


  public void testMulticasterInvalidCollectionClass_PassingAnInterfaceNotAConcreteClass() {
    new AssertThrows(FatalBeanException.class) {
      public void test() throws Exception {
        AbstractApplicationEventMulticaster mc = getMulticaster();
        mc.setCollectionClass(List.class);
      }
    }.runTest();

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