From d88173b9f82dd46a5659181525948cd0c43ffa76 Mon Sep 17 00:00:00 2001
From: Logan Smyth <loganfsmyth@gmail.com>
Date: Tue, 6 Feb 2018 23:12:19 -0800
Subject: [PATCH] Ensure that tests don't leave mutated global state in the
 environment.

---
 packages/babel-node/test/index.js                      | 10 ++++++++++
 packages/babel-preset-env/test/debug-fixtures.js       | 10 ++++++++++
 .../preset-options/browserslist-config/options.json    |  2 +-
 .../preset-options/browserslist-package/options.json   |  2 +-
 4 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/packages/babel-node/test/index.js b/packages/babel-node/test/index.js
index 6e48f0f2ab..4643475255 100644
--- a/packages/babel-node/test/index.js
+++ b/packages/babel-node/test/index.js
@@ -177,6 +177,16 @@ fs.readdirSync(fixtureLoc).forEach(function(binName) {
 
   const suiteLoc = path.join(fixtureLoc, binName);
   describe("bin/" + binName, function() {
+    let cwd;
+
+    beforeEach(() => {
+      cwd = process.cwd();
+    });
+
+    afterEach(() => {
+      process.chdir(cwd);
+    });
+
     fs.readdirSync(suiteLoc).forEach(function(testName) {
       if (testName[0] === ".") return;
 
diff --git a/packages/babel-preset-env/test/debug-fixtures.js b/packages/babel-preset-env/test/debug-fixtures.js
index 288407f8b3..4b4fcb2569 100644
--- a/packages/babel-preset-env/test/debug-fixtures.js
+++ b/packages/babel-preset-env/test/debug-fixtures.js
@@ -76,6 +76,16 @@ const buildTest = opts => {
 };
 
 describe("debug output", () => {
+  let cwd;
+
+  beforeEach(() => {
+    cwd = process.cwd();
+  });
+
+  afterEach(() => {
+    process.chdir(cwd);
+  });
+
   fs.readdirSync(fixtureLoc).forEach(testName => {
     if (testName.slice(0, 1) === ".") return;
     const testLoc = path.join(fixtureLoc, testName);
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/options.json b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/options.json
index f048ce5e36..1545c51ee9 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/options.json
+++ b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-config/options.json
@@ -1,7 +1,7 @@
 {
   "presets": [
     ["../../../../lib", {
-      "configPath": "../fixtures/preset-options/browserslist-config",
+      "configPath": "packages/babel-preset-env/test/fixtures/preset-options/browserslist-config",
       "modules": false
     }]
   ]
diff --git a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/options.json b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/options.json
index 04183bdbd1..c10fd049d7 100644
--- a/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/options.json
+++ b/packages/babel-preset-env/test/fixtures/preset-options/browserslist-package/options.json
@@ -1,7 +1,7 @@
 {
   "presets": [
     ["../../../../lib", {
-      "configPath": "../fixtures/preset-options/browserslist-package",
+      "configPath": "packages/babel-preset-env/test/fixtures/preset-options/browserslist-package",
       "targets": {
         "chrome": 55
       },