test: e2e tests for Slices API

e2e-tests/development-runtime/cypress/integration/slices/slice-via-create-page.js

@@ -0,0 +1,25 @@
+import { allRecipes, allRecipeAuthors } from "../../../shared-data/slices"
+
+/**
+ * Test behaviour when a slice is created and passed `slices` option to createPage
+ */
+
+describe("Slice passed via createPage", () => {
+  it("Pages created with slices mapping have correct content", () => {
+    allRecipes.forEach(recipe => {
+      cy.visit(`recipe/${recipe.id}`).waitForRouteChange()
+
+      cy.getTestElement(`recipe-name`)
+        .invoke(`text`)
+        .should(`contain`, recipe.name)
+
+      cy.getTestElement(`recipe-description`)
+        .invoke(`text`)
+        .should(`contain`, recipe.description)
+
+      cy.getTestElement(`recipe-author-name`)
+        .invoke(`text`)
+        .should(`contain`, allRecipeAuthors.find(author => recipe.authorId === author.id).name)
+    })
+  })
+})

e2e-tests/development-runtime/cypress/integration/slices/slices.js

@@ -0,0 +1,33 @@
+/**
+ * Test basic Slices API behaviour like context, props, ....
+ */
+
+describe(`Slices`, () => {
+  beforeEach(() => {
+    cy.visit(`/`).waitForRouteChange()
+  })
+
+  it(`Slice content show on screen`, () => {
+    cy.getTestElement(`footer-static-text`)
+      .invoke(`text`)
+      .should(`contain`, `Built with`)
+  })
+
+  it(`Slice recieves context passed via createSlice`, () => {
+    cy.getTestElement(`footer-slice-context-value`)
+      .invoke(`text`)
+      .should(`contain`, `Gatsby`)
+  })
+
+  it(`Slice can take in props`, () => {
+    cy.getTestElement(`footer-props`)
+      .invoke(`text`)
+      .should(`contains`, `Gatsbyjs`)
+  })
+
+  it(`Slice can consume a context wrapped in WrapRootElement`, () => {
+    cy.getTestElement(`footer-context-derieved-value`)
+      .invoke(`text`)
+      .should(`contain`, `2`)
+  })
+})

e2e-tests/development-runtime/gatsby-node.js

@@ -1,6 +1,7 @@
 const path = require(`path`)
 const { createFilePath } = require(`gatsby-source-filesystem`)
 const headFunctionExportSharedData = require("./shared-data/head-function-export")
+const slicesData = require("./shared-data/slices")
 const {
   addRemoteFilePolyfillInterface,
   polyfillImageServiceDevRoutes,
@@ -37,7 +38,8 @@ exports.sourceNodes = ({ actions, createNodeId, createContentDigest }) => {
   const items = [
     {
       name: "photoA.jpg",
-      url: "https://images.unsplash.com/photo-1517849845537-4d257902454a?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=2000&q=80",
+      url:
+        "https://images.unsplash.com/photo-1517849845537-4d257902454a?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=2000&q=80",
       placeholderUrl:
         "https://images.unsplash.com/photo-1517849845537-4d257902454a?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=%width%&h=%height%",
       mimeType: "image/jpg",
@@ -47,15 +49,17 @@ exports.sourceNodes = ({ actions, createNodeId, createContentDigest }) => {
     },
     {
       name: "photoB.jpg",
-      url: "https://images.unsplash.com/photo-1552053831-71594a27632d?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&h=2000&q=10",
+      url:
+        "https://images.unsplash.com/photo-1552053831-71594a27632d?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&h=2000&q=10",
       mimeType: "image/jpg",
       filename: "photo-1552053831.jpg",
       width: 1247,
       height: 2000,
     },
     {
       name: "photoC.jpg",
-      url: "https://images.unsplash.com/photo-1561037404-61cd46aa615b?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=2000&q=80",
+      url:
+        "https://images.unsplash.com/photo-1561037404-61cd46aa615b?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=2000&q=80",
       placeholderUrl:
         "https://images.unsplash.com/photo-1561037404-61cd46aa615b?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=%width%&h=%height%",
       mimeType: "image/jpg",
@@ -122,7 +126,7 @@ exports.onCreateNode = function onCreateNode({
  * @type {import('gatsby').createPages}
  */
 exports.createPages = async function createPages({
-  actions: { createPage, createRedirect },
+  actions: { createPage, createRedirect, createSlice },
   graphql,
 }) {
   const { data } = await graphql(`
@@ -172,6 +176,41 @@ exports.createPages = async function createPages({
     })
   })
 
+  //-------------------------Slice API----------------------------
+  createSlice({
+    id: `footer`,
+    component: path.resolve(`./src/components/footer.js`),
+    context: {
+      framework: slicesData.framework,
+    },
+  })
+
+  slicesData.allRecipeAuthors.forEach(({ id, name }) => {
+    createSlice({
+      id: `author-${id}`,
+      component: path.resolve(`./src/components/recipe-author.js`),
+      context: {
+        name,
+        id,
+      },
+    })
+  })
+
+  slicesData.allRecipes.forEach(({ authorId, id, name, description }) => {
+    createPage({
+      path: `/recipe/${id}`,
+      component: path.resolve(`./src/templates/recipe.js`),
+      context: {
+        description: description,
+        name,
+      },
+      slices: {
+        author: `author-${authorId}`,
+      },
+    })
+  })
+  //---------------------------------------------------------------
+
   createPage({
     path: `/안녕`,
     component: path.resolve(`src/pages/page-2.js`),

e2e-tests/development-runtime/shared-data/slices.js

@@ -0,0 +1,25 @@
+const allRecipes = [
+  {
+    id: "r1",
+    name: "Jollof Rice",
+    description:
+      "It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).",
+    authorId: "a-1",
+  },
+  {
+    id: "r2",
+    name: "Ewa Agoyin",
+    description:
+      "It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).",
+    authorId: "a-2",
+  },
+]
+
+const allRecipeAuthors = [
+  { id: "a-1", name: "Jude" },
+  { id: "a-2", name: "Ty" },
+]
+
+const framework = "Gatsby"
+
+module.exports = { allRecipes, allRecipeAuthors, framework }

e2e-tests/development-runtime/src/components/footer.js

@@ -0,0 +1,23 @@
+import React, { useContext } from "react"
+import { ContextForSlices } from "../context-for-slices"
+
+// Use as a Slice
+function Footer({ framework, lang, sliceContext: { framework: frameworkViaContext }}) {
+  const { posts } = useContext(ContextForSlices)
+
+  return (
+    <footer
+      style={{
+        marginTop: `10px`,
+        fontSize: `12px`,
+      }}
+    >
+     <span data-testid="footer-slice-context-value">{frameworkViaContext}</span>
+     <span data-testid="footer-static-text">Built with {` `}</span>
+     <span data-testid="footer-props">{`${framework}${lang}`}</span>
+     {` `}Posts Count: <span data-testid="footer-context-derieved-value">{`${posts.length}`}</span>
+    </footer>
+  )
+}
+
+export default Footer

e2e-tests/development-runtime/src/components/layout.js

@@ -1,6 +1,6 @@
 import React from "react"
 import PropTypes from "prop-types"
-import { StaticQuery, graphql } from "gatsby"
+import { StaticQuery, graphql, Slice } from "gatsby"
 
 import Header from "./header"
 import "./layout.css"
@@ -29,6 +29,12 @@ const Layout = ({ children }) => (
         >
           {children}
         </div>
+        <Slice alias="footer" framework="Gatsby" lang="js"/>
+
+         {/** The slice below doesn't exist but it shouldn't break build */}
+        <Slice alias="this-alias-does-not-exist" allowEmpty/>
+
+         {/** Insert this here and expect it to fail   <Slice alias="this-alias-does-not-exist-too"/>*/}
       </>
     )}
   />

e2e-tests/development-runtime/src/components/recipe-author.js

@@ -0,0 +1,15 @@
+import React from "react"
+
+// Use as a Slice
+function RecipeAuthor({ sliceContext: { name } }) {
+  return (
+    <div>
+      Written by{" "}
+      <span data-testid="recipe-author-name" style={{ fontWeight: "bold" }}>
+        {name}
+      </span>
+    </div>
+  )
+}
+
+export default RecipeAuthor

e2e-tests/development-runtime/src/context-for-slices.js

@@ -0,0 +1,25 @@
+import React from "react"
+
+const ContextForSlices = React.createContext()
+
+const ContextForSlicesProvider = ({ children }) => {
+  const contextValue = {
+    posts: [
+      {
+        title: "My first blog post",
+        content: "This is my first blog post",
+      },
+      {
+        title: "My second blog post",
+        content: "This is my second blog post",
+      },
+    ],
+  }
+  return (
+    <ContextForSlices.Provider value={contextValue}>
+      {children}
+    </ContextForSlices.Provider>
+  )
+}
+
+export { ContextForSlices, ContextForSlicesProvider }

e2e-tests/development-runtime/src/templates/recipe.js

@@ -0,0 +1,15 @@
+import React from "react"
+import { Slice } from "gatsby"
+import Layout from "../components/layout"
+
+const Recipe = ({ pageContext: { description, name } }) => {
+  return (
+    <Layout>
+      <h1 data-testid="recipe-name">{name}</h1>
+      <p data-testid="recipe-description">{description}</p>
+      <Slice alias="author" />
+    </Layout>
+  )
+}
+
+export default Recipe

e2e-tests/development-runtime/src/wrap-root-element.js

@@ -1,6 +1,7 @@
 import React from "react"
 import { StaticQuery, graphql, Script } from "gatsby"
 import { scripts } from "../gatsby-script-scripts"
+import { ContextForSlicesProvider } from "./context-for-slices"
 
 const WrapRootElement = ({ element }) => (
   <StaticQuery
@@ -18,7 +19,7 @@ const WrapRootElement = ({ element }) => (
         siteMetadata: { title },
       },
     }) => (
-      <>
+      <ContextForSlicesProvider>
         {element}
         <Script src={scripts.jQuery} strategy="post-hydrate" />
         <Script src={scripts.popper} strategy="idle" />
@@ -29,7 +30,7 @@ const WrapRootElement = ({ element }) => (
             %TEST_HMR_IN_GATSBY_BROWSER%
           </div>
         </div>
-      </>
+      </ContextForSlicesProvider>
     )}
   />
 )

e2e-tests/production-runtime/cypress/integration/slices/slice-via-create-page.js

@@ -0,0 +1,25 @@
+import { allRecipes, allRecipeAuthors } from "../../../shared-data/slices"
+
+/**
+ * Test behaviour when a slice is created and passed `slices` option to createPage
+ */
+
+describe("Slice passed via createPage", () => {
+  it("Pages created with slices mapping have correct content", () => {
+    allRecipes.forEach(recipe => {
+      cy.visit(`recipe/${recipe.id}`).waitForRouteChange()
+
+      cy.getTestElement(`recipe-name`)
+        .invoke(`text`)
+        .should(`contain`, recipe.name)
+
+      cy.getTestElement(`recipe-description`)
+        .invoke(`text`)
+        .should(`contain`, recipe.description)
+
+      cy.getTestElement(`recipe-author-name`)
+        .invoke(`text`)
+        .should(`contain`, allRecipeAuthors.find(author => recipe.authorId === author.id).name)
+    })
+  })
+})

e2e-tests/production-runtime/cypress/integration/slices/slices.js

@@ -0,0 +1,44 @@
+/**
+ * Test basic Slices API behaviour like context, props, ....
+ */
+
+Cypress.on(`uncaught:exception`, err => {
+  if (
+    (err.message.includes(`Minified React error #418`) ||
+      err.message.includes(`Minified React error #423`) ||
+      err.message.includes(`Minified React error #425`)) &&
+    Cypress.env(`TEST_PLUGIN_OFFLINE`)
+  ) {
+    return false
+  }
+})
+
+describe(`Slices`, () => {
+  beforeEach(() => {
+    cy.visit(`/`).waitForRouteChange()
+  })
+
+  it(`Slice content show on screen`, () => {
+    cy.getTestElement(`footer-static-text`)
+      .invoke(`text`)
+      .should(`contain`, `Built with`)
+  })
+
+  it(`Slice recieves context passed via createSlice`, () => {
+    cy.getTestElement(`footer-slice-context-value`)
+      .invoke(`text`)
+      .should(`contain`, `Gatsby`)
+  })
+
+  it(`Slice can take in props`, () => {
+    cy.getTestElement(`footer-props`)
+      .invoke(`text`)
+      .should(`contains`, `Gatsbyjs`)
+  })
+
+  it(`Slice can consume a context wrapped in WrapRootElement`, () => {
+    cy.getTestElement(`footer-context-derieved-value`)
+      .invoke(`text`)
+      .should(`contain`, `2`)
+  })
+})