AssertTest.java

package junit.tests;

import junit.framework.AssertionFailedError;
import junit.framework.TestCase;

public class AssertTest extends TestCase {
	public AssertTest(String name) {
		super(name);
	}
	
	/**
  	 * Test for the special Double.NaN value.
  	 */
 	public void testAssertEqualsNaNFails() {
		try {
			assertEquals(1.234, Double.NaN, 0.0);
		} catch (AssertionFailedError e) {
			return;
		}
		fail();
	}

	public void testAssertNaNEqualsFails() {
		try {
			assertEquals(Double.NaN, 1.234, 0.0);
		} catch (AssertionFailedError e) {
			return;
		}
		fail();
	}

	public void testAssertNaNEqualsNaNFails() {
		try {
			assertEquals(Double.NaN, Double.NaN, 0.0);
		} catch (AssertionFailedError e) {
			return;
		}
		fail();
	}

	public void testAssertPosInfinityNotEqualsNegInfinity() {
		try {
			assertEquals(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY, 0.0);
		} catch (AssertionFailedError e) {
			return;
		}
		fail();
	}

	public void testAssertPosInfinityNotEquals() {
		try {
			assertEquals(Double.POSITIVE_INFINITY, 1.23, 0.0);
		} catch (AssertionFailedError e) {
			return;
		}
		fail();
	}

	public void testAssertPosInfinityEqualsInfinity() {
		assertEquals(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY, 0.0);
	}
	
	public void testAssertNegInfinityEqualsInfinity() {
		assertEquals(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY, 0.0);
	}

	public void testAssertEquals() {
		Object o= new Object();
		assertEquals(o, o);
	}
	
	public void testAssertEqualsNull() {
		assertEquals(null, null);
	}
	
	public void testAssertNull() {
		assertNull(null);
	}
	
	public void testAssertNullNotEqualsNull() {
 		try {
			assertEquals(null, new Object());
		} catch (AssertionFailedError e) {
			return;
		}
		fail();
	}
	
	public void testAssertSame() {
		Object o= new Object();
		assertSame(o, o);
	}
	
	public void testAssertSameFails() {
		try {
			assertSame(new Integer(1), new Integer(1));
		} catch (AssertionFailedError e) {
			return;
		}
		fail();
	}

	public void testFail() {
		try {
			fail();
		} catch (AssertionFailedError e) {
			return;
		}
		throw new AssertionFailedError(); // You can't call fail() here
	}
	
	public void testFailAssertNotNull() {
		try {
			assertNotNull(null);
		} catch (AssertionFailedError e) {
			return;
		}
		fail();
	}
	
	public void testSucceedAssertNotNull() {
		assertNotNull(new Object());
	}
}