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

      }
    }.runTest();
  }


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

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 * @author Rick Evans
 */
public final class ModelMBeanNotificationPublisherTests extends TestCase {


  public void testCtorWithNullMBean() throws Exception {
    new AssertThrows(IllegalArgumentException.class) {
      public void test() throws Exception {
        new ModelMBeanNotificationPublisher(null, createObjectName(), this);
      }
    }.runTest();
  }

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      }
    }.runTest();
  }


  public void testCtorWithNullObjectName() throws Exception {
    new AssertThrows(IllegalArgumentException.class) {
      public void test() throws Exception {
        new ModelMBeanNotificationPublisher(new SpringModelMBean(), null, this);
      }
    }.runTest();
  }

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      }
    }.runTest();
  }


  public void testCtorWithNullManagedResource() throws Exception {
    new AssertThrows(IllegalArgumentException.class) {
      public void test() throws Exception {
        new ModelMBeanNotificationPublisher(new SpringModelMBean(), createObjectName(), null);
      }
    }.runTest();
  }

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  }


  public void testSendNullNotification() throws Exception {
    final NotificationPublisher publisher
        = new ModelMBeanNotificationPublisher(new SpringModelMBean(), createObjectName(), this);
    new AssertThrows(IllegalArgumentException.class) {
      public void test() throws Exception {
        publisher.sendNotification(null);
      }
    }.runTest();
  }

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public class AssertTests extends TestCase {


    public void testInstanceOf() {
        final Set set = new HashSet();
        Assert.isInstanceOf(HashSet.class, set);
        new AssertThrows(IllegalArgumentException.class, "a hash map is not a set") {
            public void test() throws Exception {
                Assert.isInstanceOf(HashMap.class, set);
            }
        }.runTest();
    }

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    public void testIsNullDoesNotThrowExceptionIfArgumentIsNull() {
        Assert.isNull(null);
    }


    public void testIsNullThrowsExceptionIfArgumentIsNotNull() {
        new AssertThrows(IllegalArgumentException.class, "object is not null") {
            public void test() throws Exception {
                Assert.isNull(new Object());
            }
        }.runTest();
    }

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            }
        }.runTest();
    }


    public void testIsNullThrowsExceptionIfArgumentIsNotNullWithMessage() {
        new AssertThrows(IllegalArgumentException.class, "object is not null") {
            public void test() throws Exception {
                Assert.isNull(new Object(), "Bla");
            }


            protected void checkExceptionExpectations(Exception actualException) {

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            }
        }.runTest();
    }


    public void testIsTrueWithFalseExpressionThrowsException() throws Exception {
        new AssertThrows(IllegalArgumentException.class) {
            public void test() throws Exception {
                Assert.isTrue(false);
            }
        }.runTest();
    }

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    public void testIsTrueWithTrueExpressionSunnyDay() throws Exception {
        Assert.isTrue(true);
    }


    public void testHasLengthWithNullStringThrowsException() throws Exception {
        new AssertThrows(IllegalArgumentException.class) {
            public void test() throws Exception {
                Assert.hasLength(null);
            }
        }.runTest();
    }

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