如何在jasmine中测试javascript Promise函数

Question

this.result = new Promise( function( resolve, reject ){
   self.resolveMethod = resolve;
   self.rejectMethod = reject;
});

如何测试resolveMethod和rejectMethod是函数？感谢

Answer 1

使用此辅助方法并断言。

function isFunctionA(object) {
 return object && getClass.call(object) == '[object Function]';
}

Answer 2

您可以尝试以下方式：

expect(type(result.resolveMethod).toBe('function');
expect(type(result.rejectMethod).toBe('function');

Answer 3

这对我有用

describe('result', function() {
    it('should assign resolve function to resolveMethod', function() {
        expect( instance.resolveMethod ).toEqual( jasmine.any(Function) );
    });
    it('should assign reject function to rejectMethod', function() {
        expect( instance.rejectMethod ).toEqual( jasmine.any(Function) );
    });       
});