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static-entry.js
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static-entry.js
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import React from "react"
import fs from "fs"
const { join } = require(`path`)
import DevelopStaticEntry from "../develop-static-entry"
jest.mock(`fs`, () => {
const fs = jest.requireActual(`fs`)
return {
...fs,
readFileSync: jest.fn(),
}
})
jest.mock(`gatsby/package.json`, () => {
return {
version: `2.0.0`,
}
})
jest.mock(
`$virtual/sync-requires`,
() => {
return {
components: {
"page-component---src-pages-test-js": () => null,
},
}
},
{
virtual: true,
}
)
const MOCK_FILE_INFO = {
[`${process.cwd()}/public/webpack.stats.json`]: `{}`,
[`${process.cwd()}/public/chunk-map.json`]: `{}`,
[join(
process.cwd(),
`/public/page-data/about/page-data.json`
)]: JSON.stringify({
componentChunkName: `page-component---src-pages-test-js`,
path: `/about/`,
webpackCompilationHash: `1234567890abcdef1234`,
staticQueryHashes: [],
}),
[join(process.cwd(), `/public/page-data/app-data.json`)]: JSON.stringify({
webpackCompilationHash: `1234567890abcdef1234`,
}),
}
let StaticEntry
beforeEach(() => {
fs.readFileSync.mockImplementation(file => MOCK_FILE_INFO[file])
StaticEntry = require(`../static-entry`).default
})
const reverseHeadersPlugin = {
plugin: {
onPreRenderHTML: ({ getHeadComponents, replaceHeadComponents }) => {
const headComponents = getHeadComponents()
headComponents.reverse()
replaceHeadComponents(headComponents)
},
},
}
const injectValuePlugin = (hookName, methodName, value) => {
return {
plugin: {
[hookName]: staticEntry => {
const method = staticEntry[methodName]
method(value)
},
},
}
}
const checkSanitized = components => {
expect(components.includes(null)).toBeFalsy()
expect(
components.find(val => Array.isArray(val) && val.length === 0)
).toBeFalsy()
expect(components.find(val => Array.isArray(val))).toBeFalsy()
}
const checkNonEmptyHeadersPlugin = {
plugin: {
onPreRenderHTML: ({
getHeadComponents,
getPreBodyComponents,
getPostBodyComponents,
}) => {
const headComponents = getHeadComponents()
const preBodyComponents = getPreBodyComponents()
const postBodyComponents = getPostBodyComponents()
checkSanitized(headComponents)
checkSanitized(preBodyComponents)
checkSanitized(postBodyComponents)
},
},
}
const fakeStylesPlugin = {
plugin: {
onRenderBody: ({ setHeadComponents }) =>
setHeadComponents([
<style key="style1"> .style1 {} </style>,
<style key="style2"> .style2 {} </style>,
<style key="style3"> .style3 {} </style>,
]),
},
}
const reverseBodyComponentsPluginFactory = type => {
return {
plugin: {
onPreRenderHTML: props => {
const components = props[`get${type}BodyComponents`]()
components.reverse()
props[`replace${type}BodyComponents`](components)
},
},
}
}
const fakeComponentsPluginFactory = type => {
return {
plugin: {
onRenderBody: props => {
props[`set${type}BodyComponents`]([
<div key="div1"> div1 </div>,
<div key="div2"> div2 </div>,
<div key="div3"> div3 </div>,
])
},
},
}
}
describe(`develop-static-entry`, () => {
beforeEach(() => {
global.__PATH_PREFIX__ = ``
global.__BASE_PATH__ = ``
global.__ASSET_PREFIX__ = ``
})
test(`onPreRenderHTML can be used to replace headComponents`, done => {
global.plugins = [fakeStylesPlugin, reverseHeadersPlugin]
DevelopStaticEntry(`/about/`, (_, html) => {
expect(html).toMatchSnapshot()
done()
})
})
test(`onPreRenderHTML can be used to replace postBodyComponents`, done => {
global.plugins = [
fakeComponentsPluginFactory(`Post`),
reverseBodyComponentsPluginFactory(`Post`),
]
DevelopStaticEntry(`/about/`, (_, html) => {
expect(html).toMatchSnapshot()
done()
})
})
test(`onPreRenderHTML can be used to replace preBodyComponents`, done => {
global.plugins = [
fakeComponentsPluginFactory(`Pre`),
reverseBodyComponentsPluginFactory(`Pre`),
]
DevelopStaticEntry(`/about/`, (_, html) => {
expect(html).toMatchSnapshot()
done()
})
})
test(`onPreRenderHTML adds metatag note for development environment`, done => {
DevelopStaticEntry(`/about/`, (_, html) => {
expect(html).toContain(
`<meta name="note" content="environment=development"/>`
)
done()
})
})
test(`onPreRenderHTML adds metatag note for development environment after replaceHeadComponents`, done => {
global.plugins = [reverseHeadersPlugin]
DevelopStaticEntry(`/about/`, (_, html) => {
expect(html).toContain(
`<meta name="note" content="environment=development"/>`
)
done()
})
})
})
describe(`static-entry sanity checks`, () => {
beforeEach(() => {
global.__PATH_PREFIX__ = ``
global.__BASE_PATH__ = ``
global.__ASSET_PREFIX__ = ``
})
const methodsToCheck = [
`replaceHeadComponents`,
`replacePreBodyComponents`,
`replacePostBodyComponents`,
]
methodsToCheck.forEach(methodName => {
test(`${methodName} can filter out null value`, done => {
const plugin = injectValuePlugin(`onPreRenderHTML`, methodName, null)
global.plugins = [plugin, checkNonEmptyHeadersPlugin]
StaticEntry(`/about/`, (_, html) => {
done()
})
})
test(`${methodName} can filter out null values`, done => {
const plugin = injectValuePlugin(`onPreRenderHTML`, methodName, [
null,
null,
])
global.plugins = [plugin, checkNonEmptyHeadersPlugin]
StaticEntry(`/about/`, (_, html) => {
done()
})
})
test(`${methodName} can filter out empty array`, done => {
const plugin = injectValuePlugin(`onPreRenderHTML`, methodName, [])
global.plugins = [plugin, checkNonEmptyHeadersPlugin]
StaticEntry(`/about/`, (_, html) => {
done()
})
})
test(`${methodName} can filter out empty arrays`, done => {
const plugin = injectValuePlugin(`onPreRenderHTML`, methodName, [[], []])
global.plugins = [plugin, checkNonEmptyHeadersPlugin]
StaticEntry(`/about/`, (_, html) => {
done()
})
})
test(`${methodName} can flatten arrays`, done => {
const plugin = injectValuePlugin(`onPreRenderHTML`, methodName, [
<style key="style1"> .style1 {} </style>,
<style key="style2"> .style2 {} </style>,
<style key="style3"> .style3 {} </style>,
[<style key="style4"> .style3 {} </style>],
])
global.plugins = [plugin, checkNonEmptyHeadersPlugin]
StaticEntry(`/about/`, (_, html) => {
done()
})
})
})
})
describe(`static-entry`, () => {
beforeEach(() => {
global.__PATH_PREFIX__ = ``
global.__BASE_PATH__ = ``
fs.readFileSync.mockImplementation(file => MOCK_FILE_INFO[file])
})
test(`onPreRenderHTML can be used to replace headComponents`, done => {
global.plugins = [fakeStylesPlugin, reverseHeadersPlugin]
StaticEntry(`/about/`, (_, html) => {
expect(html).toMatchSnapshot()
done()
})
})
test(`onPreRenderHTML can be used to replace postBodyComponents`, done => {
global.plugins = [
fakeComponentsPluginFactory(`Post`),
reverseBodyComponentsPluginFactory(`Post`),
]
StaticEntry(`/about/`, (_, html) => {
expect(html).toMatchSnapshot()
done()
})
})
test(`onPreRenderHTML can be used to replace preBodyComponents`, done => {
global.plugins = [
fakeComponentsPluginFactory(`Pre`),
reverseBodyComponentsPluginFactory(`Pre`),
]
StaticEntry(`/about/`, (_, html) => {
expect(html).toMatchSnapshot()
done()
})
})
test(`onPreRenderHTML does not add metatag note for development environment`, done => {
StaticEntry(`/about/`, (_, html) => {
expect(html).not.toContain(
`<meta name="note" content="environment=development"/>`
)
done()
})
})
})
describe(`sanitizeComponents`, () => {
let sanitizeComponents
beforeEach(() => {
fs.readFileSync.mockImplementation(file => MOCK_FILE_INFO[file])
sanitizeComponents = require(`../static-entry`).sanitizeComponents
})
it(`strips assetPrefix for manifest link`, () => {
global.__PATH_PREFIX__ = `https://gatsbyjs.org/blog`
global.__BASE_PATH__ = `/blog`
global.__ASSET_PREFIX__ = `https://gatsbyjs.org`
const sanitizedComponents = sanitizeComponents([
<link
key="manifest"
rel="manifest"
href="https://gatsbyjs.org/blog/manifest.webmanifest"
/>,
])
expect(sanitizedComponents[0].props.href).toBe(`/blog/manifest.webmanifest`)
})
})