Reinit project

src/pages/__tests__/__mocks__/umi-plugin-locale.ts

@@ -0,0 +1 @@
+export const formatMessage = (): string => 'Mock text';

src/pages/__tests__/index.test.tsx

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+import 'jest';
+import Index from '..';
+import React from 'react';
+import renderer, { ReactTestInstance, ReactTestRenderer } from 'react-test-renderer';
+
+jest.mock('umi-plugin-locale');
+
+describe('Page: index', () => {
+  it('Render correctly', () => {
+    const wrapper: ReactTestRenderer = renderer.create(<Index />);
+    expect(wrapper.root.children.length).toBe(1);
+    const outerLayer = wrapper.root.children[0] as ReactTestInstance;
+    expect(outerLayer.type).toBe('div');
+    expect(outerLayer.children.length).toBe(2);
+    const getStartLink = outerLayer.findAllByProps({
+      href: 'https://umijs.org/guide/getting-started.html',
+    }) as ReactTestInstance[];
+    expect(getStartLink.length).toBe(1);
+    expect(getStartLink[0].children).toMatchObject(['Mock text']);
+  });
+});