我正在使用TypeScript处理React-Native项目.要编写我的单元测试,我想使用
babel-plugin-rewire来模拟我的模块导入.但是,在从ES6转换为ES5时,TypeScript会在导入结尾处添加_1后缀,这会破坏我的测试代码.
考虑以下:
import Test from 'test-file';
这可能会被TypeScript转换为:
var test_file_1 = require('test-file');
要使用Rewire插件模拟Test类,我必须写:
ComponentToTest.__Rewire__('Test',TestMock);
但由于导入已重命名,因此会中断.
虽然这是by design,但我很想知道是否有任何解决方法.
谢谢.
我不知道Babel-Plugin-Rewire,但是如果你单独使用TypeScript和Rewire,包括将ES6模块编译到ES5,你可以轻松地直接模拟生成的文件导入.
原文链接:https://www.f2er.com/react/300866.html即这应该工作:
ComponentToTest.__set__('test_file_1',{ default: TestMock });
这取决于_1后缀,后者可能会在以后的TypeScript版本中发生变化,或者您对TypeScript代码本身进行了某些更改.我认为风险相当低.
Full Rewire TS示例:
Component.ts:
import DefaultComponent from "other-component"; import { IndividuallyExportedComponent } from "yet-another-component"; // ... Do something worth testing
组件的Test.ts:
import rewire = require("rewire"); let RewiredComponent = rewire("../src/Component"); let defaultMock = { /* Make a mock of your dependency */ }; RewiredComponent.__set__('other_component_1',{ default: defaultComponentMock }); let individuallyExportedMock = { /* Make a mock of your dependency */ }; RewiredComponent.__set__('yet_another_component_1',{ IndividuallyExportedComponent: individuallyExportedMock }); // RewiredComponent has the wrong type now. YMMV,but I'm doing type-wrangling // that looks something like: import * as RealComponent from "../src/Component"; let Component: typeof RealComponent & typeof RewiredComponent = <any> RewiredComponent; // 'Component' now has the same type as the real module,plus the // .__set__ etc methods from Rewire.