google3/third_party/java_src/junit/test/java/junit/tests/framework/ComparisonFailureTest.java

package junit.tests.framework;

import junit.framework.ComparisonFailure;
import junit.framework.TestCase;

public class ComparisonFailureTest extends TestCase {

    // Most of the tests are in ComparisonCompactorTest
    public void testConnection() {
        ComparisonFailure failure = new ComparisonFailure("warning", "Mary had a little lamb", "Mary had the little lamb");
        assertEquals("warning expected:<Mary had [a] little lamb> but was:<Mary had [the] little lamb>", failure.getMessage());
    }

    // This is like an instanceof test.
    public void testThrowing() {
        try {
            assertEquals("a", "b");
        } catch (ComparisonFailure e) {
            return;
        }
        fail();
    }

    public void testExceptionToStringWithMessage() {
        try {
            assertEquals("woops!", "a", "b");
        } catch (ComparisonFailure e) {
            if (!e.toString().startsWith("junit.framework.ComparisonFailure: woops! expected:<")) {
                fail("Unexpected message: " + e);
            }
            return;
        }
        fail();
    }

    public void testExceptionToStringWithoutMessage() {
        try {
            assertEquals("a", "b");
        } catch (ComparisonFailure e) {
            if (!e.toString().startsWith("junit.framework.ComparisonFailure: expected:<")) {
                fail("Unexpected message: " + e);
            }
            return;
        }
        fail();
    }
}