18a9c7e371
* Update `packages/` * Update examples * Update tests * Update bench * Update top level files * Fix build * trigger
56 lines
1.8 KiB
JavaScript
56 lines
1.8 KiB
JavaScript
/* eslint-env jest */
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import { loadGetInitialProps } from 'next/dist/next-server/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(
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'"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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)
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return expect(rejectPromise).rejects.toEqual(error)
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})
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it('should resolve to an empty object if getInitialProps is missing', async () => {
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const result = await loadGetInitialProps(() => {}, {})
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expect(result).toEqual({})
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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(
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'"TestComponent.getInitialProps()" should resolve to an object. But found "undefined" instead.'
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)
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return expect(rejectPromise).rejects.toEqual(error)
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})
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})
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