是否有茉莉花匹配器来比较其属性子集上的对象 [英] Is there a jasmine matcher to compare objects on subsets of their properties

问题描述

我有一个可以根据我的测试行为进行扩展的对象，但我想确保原始属性仍然存在。

I have an object that may be extended along my behavior under test, but I want to make sure that the original properties are still there.

var example = {'foo':'bar', 'bar':'baz'}

var result = extendingPipeline(example)
// {'foo':'bar', 'bar':'baz', 'extension': Function}

expect(result).toEqual(example) //fails miserably

我希望有一个匹配器，在这种情况下会传递：

I'd like to have a matcher that would pass in this case, along the lines of:

expect(result).toInclude(example)

我知道我可以编写自定义匹配器，但在我看来，这是一个常见的问题，解决方案应该已经存在。我应该在哪里寻找它？

I know that I can write a custom matcher, but it seems to me that this is such a common problem that a solution should be out there already. Where should I look for it?

推荐答案

Jasmine 2.0

Jasmine 2.0

expect(result).toEqual(jasmine.objectContaining(example))

自此修复： https://github.com/pivotal/jasmine/commit/47884032ad255e8e15144dcd3545c3267795dee0
它甚至适用于嵌套对象，你只需要在中包含你想要匹配的每个对象jasmine.objectContaining（）

简单示例：

it('can match nested partial objects', function ()
{
    var joc = jasmine.objectContaining;
    expect({ 
        a: {x: 1, y: 2}, 
        b: 'hi' 
    }).toEqual(joc({
        a: joc({ x: 1})
    }));
});

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