assertEquals（Object o1，Object o2）是否使用equals方法

In other words, does assertEquals works with a class that overrides equals

换句话说,assertEquals是否与覆盖equals的类一起使用

6 个解决方案

#1

From the source code of the assertEquals method that you can find on the Junit GitHub Repo:

从您可以在Junit GitHub Repo上找到的assertEquals方法的源代码:

/**
 * 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);
}

You can see that Junit is using the .equals() method.

你可以看到Junit正在使用.equals()方法。

Edit:

The code snippet is coming from a deprecated version of Junit.

代码段来自不推荐使用的Junit版本。

You can read about the source of the 'new' Junit here. The idea is pretty much the same, the .equals() method is also used.

你可以在这里阅读关于'新'Junit的来源。这个想法几乎相同,也使用.equals()方法。

#2

does assertEquals works with a class that overrides equals?

assertEquals是否与覆盖等于的类一起使用?

Yes, assertEquals() invokes the overridden equals() if the class has one.

是的,如果类有一个,则assertEquals()调用重写的equals()。

#3

Yes, it calls equals and there is a separate method, assertSame, that uses ==. Just to clear things up, assertEquals works with any object since all objects declare equals.

是的,它调用equals,并且有一个单独的方法assertSame,它使用==。只是为了清理,assertEquals适用于任何对象,因为所有对象都声明为equals。

#4

Yes it does.

是的,它确实。

Object m = new Object() {

    @Override
    public boolean equals(Object obj) {
        System.out.println("proof!");
        return super.equals(obj);
    }
};
Assert.assertEquals(m, m);

#5

yes - TestNG overrides equals -

是的 - TestNG覆盖等于 -

static public void assertEquals(Object actual, Object expected, String message) {
    if((expected == null) && (actual == null)) {
      return;
    }
    if(expected != null) {
      if (expected.getClass().isArray()) {
        assertArrayEquals(actual, expected, message);
        return;
      } else if (expected.equals(actual)) {
        return;
      }
    }
    failNotEquals(actual, expected, message);
  }

#6

JUnit is opensource, so you could have looked it up yourself in the source: https://github.com/junit-team/junit4/blob/master/src/main/java/org/junit/Assert.java

JUnit是开源的,所以你可以在源代码中自己查找:https://github.com/junit-team/junit4/blob/master/src/main/java/org/junit/Assert.java

static public void assertEquals(String message, Object expected,
        Object actual) {
    if (equalsRegardingNull(expected, actual)) {
        return;
    } else if (expected instanceof String && actual instanceof String) {
        String cleanMessage = message == null ? "" : message;
        throw new ComparisonFailure(cleanMessage, (String) expected,
                (String) actual);
    } else {
        failNotEquals(message, expected, actual);
    }
}

private static boolean equalsRegardingNull(Object expected, Object actual) {
    if (expected == null) {
        return actual == null;
    }

    return isEquals(expected, actual);
}

private static boolean isEquals(Object expected, Object actual) {
    return expected.equals(actual);
}

So as you can see it uses equals. If you want to compare identity, you use assertSame.

所以你可以看到它使用equals。如果要比较标识,请使用assertSame。

#1