Does assertEquals(Object o1, Object o2) uses the equals method

Question

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

Answer 1

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

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.