fix(babel-preset-gatsby): Add babel-plugin-dynamic-import-node for tests

packages/babel-preset-gatsby-package/__tests__/__snapshots__/index.js.snap

@@ -64,6 +64,7 @@ Array [
   "@babel/plugin-proposal-optional-chaining",
   "@babel/plugin-transform-runtime",
   "@babel/plugin-syntax-dynamic-import",
+  "babel-plugin-dynamic-import-node",
 ]
 `;
 
@@ -123,6 +124,7 @@ Array [
   "@babel/plugin-proposal-optional-chaining",
   "@babel/plugin-transform-runtime",
   "@babel/plugin-syntax-dynamic-import",
+  "babel-plugin-dynamic-import-node",
 ]
 `;
 

packages/babel-preset-gatsby-package/index.js

@@ -4,20 +4,21 @@ function preset(context, options = {}) {
   const { browser = false, debug = false, nodeVersion = `8.0` } = options
   const { NODE_ENV, BABEL_ENV } = process.env
 
-  const PRODUCTION = (BABEL_ENV || NODE_ENV) === `production`
+  const IS_PRODUCTION = (BABEL_ENV || NODE_ENV) === `production`
+  const IS_TEST  = (BABEL_ENV || NODE_ENV) === `test`
 
   const browserConfig = {
     useBuiltIns: false,
     targets: {
-      browsers: PRODUCTION
+      browsers: IS_PRODUCTION
         ? [`last 4 versions`, `safari >= 7`, `ie >= 9`]
         : [`last 2 versions`, `not ie <= 11`, `not android 4.4.3`],
     },
   }
 
   const nodeConfig = {
     targets: {
-      node: PRODUCTION ? nodeVersion : `current`,
+      node: IS_PRODUCTION ? nodeVersion : `current`,
     },
   }
 
@@ -36,15 +37,16 @@ function preset(context, options = {}) {
           browser ? browserConfig : nodeConfig
         ),
       ],
-      [r(`@babel/preset-react`), { development: !PRODUCTION }],
+      [r(`@babel/preset-react`), { development: !IS_PRODUCTION }],
       r(`@babel/preset-flow`),
     ],
     plugins: [
       r(`@babel/plugin-proposal-class-properties`),
       r(`@babel/plugin-proposal-optional-chaining`),
       r(`@babel/plugin-transform-runtime`),
       r(`@babel/plugin-syntax-dynamic-import`),
-    ],
+      IS_TEST && r(`babel-plugin-dynamic-import-node`)
+    ].filter(Boolean),
   }
 }
 

packages/babel-preset-gatsby-package/package.json

@@ -15,7 +15,8 @@
     "@babel/plugin-transform-runtime": "^7.0.0",
     "@babel/preset-env": "^7.0.0",
     "@babel/preset-flow": "^7.0.0",
-    "@babel/preset-react": "^7.0.0"
+    "@babel/preset-react": "^7.0.0",
+    "babel-plugin-dynamic-import-node": "^1.2.0"
   },
   "license": "MIT",
   "main": "index.js",

packages/babel-preset-gatsby/package.json

@@ -15,7 +15,8 @@
     "@babel/preset-env": "^7.4.1",
     "@babel/preset-react": "^7.0.0",
     "@babel/runtime": "^7.4.5",
-    "babel-plugin-macros": "^2.4.2"
+    "babel-plugin-macros": "^2.4.2",
+    "babel-plugin-dynamic-import-node": "^1.2.0"
   },
   "peerDependencies": {
     "@babel/core": "^7.0.0"

packages/babel-preset-gatsby/src/__tests__/index.js

@@ -56,6 +56,7 @@ it(`Specifies proper presets and plugins for test stage`, () => {
         loose: false,
       },
     ],
+    expect.stringContaining(`babel-plugin-dynamic-import-node`),
   ])
 })
 
@@ -123,6 +124,7 @@ it(`Specifies proper presets and plugins for build-html stage`, () => {
         loose: false,
       },
     ],
+    expect.stringContaining(`babel-plugin-dynamic-import-node`),
   ])
 })
 

packages/babel-preset-gatsby/src/index.js

@@ -2,9 +2,11 @@ const path = require(`path`)
 
 const resolve = m => require.resolve(m)
 
+const IS_TEST = (process.env.BABEL_ENV || process.env.NODE_ENV) === `test`
+
 const loadCachedConfig = () => {
   let pluginBabelConfig = {}
-  if (process.env.NODE_ENV !== `test`) {
+  if (!IS_TEST) {
     try {
       pluginBabelConfig = require(path.join(
         process.cwd(),
@@ -91,6 +93,7 @@ module.exports = function preset(_, options = {}) {
           loose: false, // Fixes #14848
         },
       ],
-    ],
+      IS_TEST && resolve(`babel-plugin-dynamic-import-node`),
+    ].filter(Boolean),
   }
 }