29f71bfcba
* Moved server/lib/utils.js to Typescript * moved _app.js to Typescript * Moved _error.js to Typescript * Added argument for custom props in _app and _error * Moved _document.js to Typescript * updated one test * Updated types and added a validation for _document props * Improved types * Fixed some types * Updated AppType * Fixed some tests * Added missing import * Removed a not very useful type * Fix missing type * Move @types/styled-jsx * Fix typescript errors
52 lines
1.8 KiB
JavaScript
52 lines
1.8 KiB
JavaScript
/* eslint-env jest */
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import { loadGetInitialProps } from 'next-server/dist/lib/utils'
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describe('loadGetInitialProps', () => {
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it('should throw if getInitialProps is defined as an instance method', () => {
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class TestComponent {
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getInitialProps () {}
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}
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const rejectPromise = loadGetInitialProps(TestComponent, {})
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const error = new Error('"TestComponent.getInitialProps()" is defined as an instance method - visit https://err.sh/zeit/next.js/get-initial-props-as-an-instance-method for more information.')
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return expect(rejectPromise).rejects.toEqual(error)
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})
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it('should resolve to null if getInitialProps is missing', async () => {
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const result = await loadGetInitialProps(() => {}, {})
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expect(result).toEqual(null)
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})
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it('should resolve getInitialProps', async () => {
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class TestComponent {
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static async getInitialProps () {
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return { foo: 1 }
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}
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}
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const result = await loadGetInitialProps(TestComponent, {})
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expect(result).toEqual({ foo: 1 })
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})
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it('should be able to return an invalid value if the request was already sent', async () => {
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class TestComponent {
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static async getInitialProps () {
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return 'invalidValue'
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}
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}
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const ctx = {
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res: {
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finished: true
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}
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}
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const result = await loadGetInitialProps(TestComponent, ctx)
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expect(result).toBe('invalidValue')
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})
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it('should throw if getInitialProps won\'t return an object ', () => {
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class TestComponent {
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static async getInitialProps () {}
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}
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const rejectPromise = loadGetInitialProps(TestComponent, {})
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const error = new Error('"TestComponent.getInitialProps()" should resolve to an object. But found "undefined" instead.')
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return expect(rejectPromise).rejects.toEqual(error)
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})
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})
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