Assert.assertEquals()方法参数详解

/**
 * Asserts that two ints are equal. 断言两个int是相等的
 */
static public void assertEquals(int expected, int actual) {
    assertEquals(null, expected, actual);
}

/**
 * Asserts that two ints are equal. If they are not
 * an AssertionFailedError is thrown with the given message.
 * 如果不抛出带有 message 的异常(AssertionFailedError)信息, 则表明两者相等
 */
static public void assertEquals(String message, int expected, int actual) {
    assertEquals(message, Integer.valueOf(expected), Integer.valueOf(actual));
}

/**
 * Asserts that two objects are equal. If they are not
 * an AssertionFailedError is thrown with the given message.
 * 如果不抛出带有 message 的异常(AssertionFailedError)信息, 则表明两者相等(这里比较的是Object对象)
 */
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 public void failNotEquals(String message, Object expected, Object actual) {
    fail(format(message, expected, actual));
}

public static String format(String message, Object expected, Object actual) {
    String formatted = "";
    if (message != null && message.length() > 0) {
        formatted = message + " ";
    }
    return formatted + "expected:<" + expected + "> but was:<" + actual + ">";
}
/**
* Fails a test with the given message.
*/
static public void fail(String message) {
	if (message == null) {
	    throw new AssertionFailedError();
	}
	throw new AssertionFailedError(message);
}

Assert.assertEquals(true, arry.contains("hello"));
Assert.assertEquals(39991L, aa.getLong("key3", 0L));
Assert.assertEquals(true, bb.getBoolean("key4", false));
Assert.assertEquals(5.3f, cc.getFloat("key5", 0.f));
Assert.assertEquals(99, dd.getInt("key6", 1));
Assert.assertEquals("如果打印本信息, 证明参数不相等", 10L, 10);

/**
 * Asserts that two objects refer to the same object. If they are not
 * the same an AssertionFailedError is thrown.
 */
static public void assertSame(Object expected, Object actual) {
    assertSame(null, expected, actual);
}
/**
 * Asserts that two objects refer to the same object. If they are not
 * an AssertionFailedError is thrown with the given message.
 */
static public void assertSame(String message, Object expected, Object actual) {
    if (expected == actual) {
        return;
    }
    failNotSame(message, expected, actual);
}