是否可以将 Jasmine 的 toHaveBeenCalledWith 匹配器用于正则表达式？

我回顾了 Jasmine 关于 被召唤匹配器的文档，以了解是否可以为参数传入正则表达式(如果参数应该是字符串的话)。不幸的是，这是不受支持的功能。还有一个 在 github 上公开发行请求此功能。

我深入研究了代码库，并了解了如何在 现有的匹配者中实现这一点。我认为将它作为一个单独的匹配器来实现更为合适，这样抽象就可以单独捕获。

与此同时，有什么好的解决办法吗？

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最佳答案

After doing some digging, I've discovered that Jasmine spy objects have a calls property, which in turn has a mostRecent() function. This function also has a child property args, which returns an array of call arguments.

Thus, one may use the following sequence to perform a regexp match on call arguments, when one wants to check that the string arguments match a specific regular expression:

var mySpy = jasmine.createSpy('foo');
mySpy("bar", "baz");
expect(mySpy.calls.mostRecent().args[0]).toMatch(/bar/);
expect(mySpy.calls.mostRecent().args[1]).toMatch(/baz/);

Pretty straightforward.

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Alternatively, if you are spying on a method on an object:

spyOn(obj, 'method');
obj.method('bar', 'baz');
expect(obj.method.argsForCall[0][0]).toMatch(/bar/);
expect(obj.method.argsForCall[0][1]).toMatch(/baz/);
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In Jasmine 2.0 the signature changed a bit. Here it would be:

var mySpy = jasmine.createSpy('foo');
mySpy("bar", "baz");
expect(mySpy.calls.mostRecent().args[0]).toMatch(/bar/);
expect(mySpy.calls.mostRecent().args[1]).toMatch(/baz/);

And the Documentation for Jasmine 1.3 has moved.

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As jammon mentioned, the Jasmine 2.0 signature has changed. If you are spying on the method of an object in Jasmine 2.0, Nick's solution should be changed to use something like - 

spyOn(obj, 'method');
obj.method('bar', 'baz');
expect(obj.method.calls.mostRecent().args[0]).toMatch(/bar/);
expect(obj.method.calls.mostRecent().args[1]).toMatch(/baz/);
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Sometimes it is more readable to write it this way:

spyOn(obj, 'method').and.callFake(function(arg1, arg2) {
expect(arg1).toMatch(/bar/);
expect(arg2).toMatch(/baz/);
});
obj.method('bar', 'baz');
expect(obj.method).toHaveBeenCalled();

It give more clear visibility of method arguments (instead of using array)

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As of Jasmine 2.2, you can use jasmine.stringMatching:

var mySpy = jasmine.createSpy('foo');
mySpy('bar', 'baz');
expect(mySpy).toHaveBeenCalledWith(
jasmine.stringMatching(/bar/),
jasmine.stringMatching(/baz/)
);

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