Fix standalone tests for Babel 8

nicolo-ribaudo · Aug 2, 2023 · 776da5f · 776da5f
1 parent c8ec22b
commit 776da5f
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Showing 3 changed files with 33 additions and 2 deletions.
diff --git a/packages/babel-standalone/test/babel.js b/packages/babel-standalone/test/babel.js
@@ -1,11 +1,17 @@
+import * as env from "./helpers/env.js";
 import { createRequire } from "module";
 const require = createRequire(import.meta.url);
 
 // Basic smoke tests for @babel/standalone
 describe("@babel/standalone", () => {
   let Babel;
   beforeAll(() => {
-    Babel = require("../babel.js");
+    env.setup();
+    try {
+      Babel = require("../babel.js");
+    } finally {
+      env.teardown();
+    }
   });
 
   it("handles the es2015-no-commonjs preset", () => {

diff --git a/packages/babel-standalone/test/helpers/env.js b/packages/babel-standalone/test/helpers/env.js
@@ -0,0 +1,18 @@
+export function setup() {
+  // chalk, which we bundle in @babel/standalone, relies on `window.navigator`
+  // for the browser build:
+  // https://github.com/chalk/chalk/blob/f399cd0ff69841e88cca89d43a49f1cc9ba2efd5/source/vendor/supports-color/browser.js#L4
+  // We only bundle Chalk 5 in local dev and in Babel 8, so we avoid this
+  // "polyfill" when releasing Babel 7 to make sure that we do not accidentally
+  // bundle Chalk 5.
+
+  if (!process.env.IS_PUBLISH || process.env.BABEL_8_BREAKING) {
+    globalThis.navigator = {};
+  }
+}
+
+export function teardown() {
+  if (!process.env.IS_PUBLISH || process.env.BABEL_8_BREAKING) {
+    delete globalThis.navigator;
+  }
+}
diff --git a/packages/babel-standalone/test/preset-stage-1.test.js b/packages/babel-standalone/test/preset-stage-1.test.js
@@ -1,10 +1,17 @@
+import * as env from "./helpers/env.js";
+
 import { createRequire } from "module";
 const require = createRequire(import.meta.url);
 
 describe("stage-1 preset", () => {
   let Babel;
   beforeAll(() => {
-    Babel = require("../babel.js");
+    env.setup();
+    try {
+      Babel = require("../babel.js");
+    } finally {
+      env.teardown();
+    }
   });
 
   it("should parser decimal literal", () => {