javascript - 测试功能如何从外部导入组件？(How test functions imported in component from outside?)

Question

I write test for component which use FileSaver in it method.(我为使用FileSaver的组件编写测试方法。)

I don't know how covered usage FileSaver by unit tests in Angular7(我不知道Angular7中单元测试如何覆盖使用FileSaver) Code example:(代码示例：) import * as FileSaver from 'file-saver'; someMethod() { FileSaver.saveAs(new Blob()); }   ask by kozikov translate from so

Answer 1

You can do:(你可以做：)

const spyFileSaver = spyOn(FileSaver,'saveAs'); spyFileSave.toHaveBeenCalled();