XCTAssertEqual无法比较两个字符串值? [英] XCTAssertEqual fails to compare two string values?

问题描述

我添加了一个简单的单元测试来测试我的字符串扩展名.但是失败了.我在这里做错了什么?

I added a simple unit test to test my string extension. But it fails. What I am I doing wrong here?

据我所知，XCTAssertEqual是测试值，而不是对象本身?

From what I know XCTAssertEqual is testing value and not the object itself?

第三行btw表示字符串相等，但XCTAssertEqual表示字符串不相等.

The third line btw, says the string are equal, but XCTAssertEqual says they're not.

- (void) testInitialsFromFullname {
    NSString *firstNickName = @"Mike Kain";
    NSString *expectedResult = @"MK";
    NSLog(@"Equal:%@", [[firstNickName initialsFromString] isEqualToString:expectedResult] ? @"YES" : @"NO");

    XCTAssertEqual(expectedResult, [firstNickName initialsFromString], @"Strings are not equal %@ %@", expectedResult, [firstNickName initialsFromString]);
}

推荐答案

来自XCTAssertEqual的文档:

当a1不等于a2时生成失败. 该测试适用于C语言 标量，结构和联合.

Generates a failure when a1 is not equal to a2. This test is for C scalars, structs and unions.

您应该使用XCTAssertEqualObjects(内部使用isEqual:)或类似的内容

You should use XCTAssertEqualObjects (which uses isEqual: internally) or something like:

XCTAssertTrue([[firstNickName initialsFromString] isEqualToString:expectedResult],
              @"Strings are not equal %@ %@", expectedResult, [firstNickName initialsFromString]);

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