Java中Assert.assertEquals有哪些功能呢？

Assert.assertEquals简介

Assert.assertEquals是junit.framework包下的一个断言方法，它用于比较传入进的两个参数

Assert.assertEquals功能

用于比较两个参数是否相同，当相同时，则程序继续向下运行，
当两者不同时，终端当前测试方法，并触发AssertionFailedError异常

注意事项:
    Assert中提供很多断言方法

Assert.assertEquals()源码详解

---判断两个int是否相等
static public void assertEquals(int expected, int actual) {
    assertEquals(null, expected, actual);
}

static public void assertEquals(String message, int expected, int actual) {
    assertEquals(message, Integer.valueOf(expected), Integer.valueOf(actual));
}


----判断两个对象是否相等

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));
}


-----注意此处是查看Object的引用地址是否相等，并不是对其内容进行比较
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() 示例说明

Assert.assertEquals(true, arry.contains("java265"));
Assert.assertEquals(8888, fun());
Assert.assertEquals(true, fun2());
Assert.assertEquals(8,8f, fun3backFloat());
Assert.assertEquals(100，99);
Assert.assertEquals("断言输出信息",99L,88);