Karma jasmine 测试:在终端中突出显示差异

问题描述

我正在使用 Karma 和 Jasmine 进行测试.在某些测试中，我有测试所依赖的大对象.当我做类似的事情时

expect(obj).toEqual(expectedObj);

和 obj != expectedObj，我在终端中收到一条错误消息.但是这个错误真的很长，因为它包含了两个对象，而且很难看出这两个对象在哪些部分不同.

那么，终端有没有可以与 karma 一起使用的荧光笔?这样一来，就更容易找出问题所在了.

我遇到了同样的问题，对我来说是

I'm using Karma with Jasmine for my tests. In some tests, I have large objects that the test relies on. When I do something like

expect(obj).toEqual(expectedObj);

and obj != expectedObj, I get an error message in my terminal. But this error is really long, because it includes both of the objects, and it's very hard to see, in what parts the two objects are different.

So, is there any highlighter for the terminal, that can be used along with karma? This way, it would be much more easy to figure out, what's wrong.

I had the same problem and what did it for me was karma-jasmine-diff-reporter.

Just install it:

npm install karma-jasmine-diff-reporter --save-dev

and configure it as a reporter, eg:

// karma.conf.js 
module.exports = function(config) {
  config.set({     

    reporters: ['jasmine-diff']     

  });
};

You can configure it to pretty print:

    // karma.conf.js 
    module.exports = function(config) {
      config.set({     

        reporters: ['jasmine-diff'],     

        jasmineDiffReporter: {
            pretty: true, // 2 spaces by default for one indent level
            matchers: {
                toEqual: {
                    pretty: false   // disable pretty print for toEqual
                }
            }
        }         
      });
    };

Output will be something like this:

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