本文整理汇总了TypeScript中jest-when.when函数的典型用法代码示例。如果您正苦于以下问题：TypeScript when函数的具体用法？TypeScript when怎么用？TypeScript when使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了when函数的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的TypeScript代码示例。
示例1: it
it('Supports compound declarations:', () => {
const fn = jest.fn();
when(fn).calledWith(1).mockReturnValue('no');
when(fn).calledWith(2).mockReturnValue('way?');
when(fn).calledWith(3).mockReturnValue('yes');
when(fn).calledWith(4).mockReturnValue('way!');
expect(fn(1)).toEqual('no');
expect(fn(2)).toEqual('way?');
expect(fn(3)).toEqual('yes');
expect(fn(4)).toEqual('way!');
expect(fn(5)).toEqual(undefined);
});示例2: it
it('should support for mockImplementation', () => {
const fn = jest.fn();
const expectValue = { a: 1, b: 2 };
when(fn).calledWith(
expect.anything()
).mockImplementation(() => (expectValue));
const result = fn('whatever');
expect(result).toMatchObject(expectValue);
});示例3: it
it('Supports compound declarations:', () => {
const fn = jest.fn();
when(fn).calledWith(1).mockReturnValueOnce('no').mockReturnValue('yes');
when(fn).calledWith(2).mockReturnValue('way?');
when(fn).calledWith(3).mockResolvedValueOnce('no');
when(fn).calledWith(3).mockResolvedValue('yes');
when(fn).calledWith(4).mockRejectedValueOnce('no');
when(fn).calledWith(4).mockRejectedValue('yes');
expect(fn(1)).toEqual('no');
expect(fn(1)).toEqual('yes');
expect(fn(2)).toEqual('way?');
expect(fn(3)).resolves.toEqual('no');
expect(fn(3)).resolves.toEqual('yes');
expect(fn(4)).rejects.toEqual('no');
expect(fn(4)).rejects.toEqual('yes');
});