如何在全球范围内为茉莉花添加定制火柴?

https://github.com/JamieMason/add-matchers 可以用来写火柴在所有版本的茉莉花,以及笑话。

var addMatchers = require('add-matchers');

addMatchers({
  // matcher with 0 arguments
  toBeEvenNumber: function(received) {
    // received : 4
    return received % 2 === 0;
  },
  // matcher with 1 argument
  toBeOfType: function(type, received) {
    // type     : 'Object'
    // received : {}
    return Object.prototype.toString.call(received) === '[object ' + type + ']';
  },
  // matcher with many arguments
  toContainItems: function(arg1, arg2, arg3, received) {
    // arg1     : 2
    // arg2     : 15
    // arg3     : 100
    // received : [100, 14, 15, 2]
    return (
      received.indexOf(arg1) !== -1 &&
      received.indexOf(arg2) !== -1 &&
      received.indexOf(arg3) !== -1
    );
  }
});

请注意,我在《茉莉花3.1》中没有尝试过,但我在《茉莉花2.8》中也是这样做的:

将它放在测试之前运行的任何代码块中:

jasmine.getEnv().beforeEach(() => {
  jasmine.addMatchers({
    toBeAwesome(util, customEqualityTesters) { ... }
  })
});