assert.java

junit中的软件设计模式 源代码,看了挺有收获的

package junit.framework;

/**
 * A set of assert methods.  Messages are only displayed when an assert fails.
 */

public class Assert {

    /**
     * Asserts that two objects are equal. If they are not
     * an AssertionFailedError is thrown with the given message.
     */
    static public void assertEquals(String message, Object expected, Object actual) {
        if (expected == null && actual == null)
            return;
        if (expected != null && expected.equals(actual))
            return;
        failNotEquals(message, expected, actual);
    }



	static private void failNotEquals(String message, Object expected, Object actual) {
        String formatted= "";
        if (message != null)
            formatted= message+" ";
        formatted=formatted+"expected:<"+expected+"> but was:<"+actual+">";
		fail(formatted);
	}

    /**
     * Fails a test with the given message.
     */
    static public void fail(String message) {
        throw new AssertionFailedError(message);
    }

}