chore: remove babel-register generated test artifacts

Makefile

@@ -135,6 +135,7 @@ clean: test-clean
 	rm -rf packages/babel-polyfill/dist
 	rm -rf coverage
 	rm -rf packages/*/npm-debug*
+	rm -rf node_modules/.cache
 
 test-clean:
 	$(foreach source, $(SOURCES), \

packages/babel-register/test/fixtures/browserify/register.js

@@ -1,3 +1,4 @@
+process.env.BABEL_DISABLE_CACHE = "true";
 require("@babel/register").default({
-  ignore: false
+  ignore: false,
 });

packages/babel-register/test/index.js

@@ -7,6 +7,7 @@ let currentOptions;
 let sourceMapSupport = false;
 
 const registerFile = require.resolve("../lib/node");
+const testCacheFilename = path.join(__dirname, ".babel");
 const testFile = require.resolve("./fixtures/babelrc/es2015");
 const testFileContent = fs.readFileSync(testFile);
 const sourceMapTestFile = require.resolve("./fixtures/source-map/index");
@@ -41,10 +42,23 @@ const defaultOptions = {
   ignoreNodeModules: false,
 };
 
+function cleanCache() {
+  try {
+    fs.unlinkSync(testCacheFilename);
+  } catch (e) {
+    // It is convenient to always try to clear
+  }
+}
+
+function resetCache() {
+  process.env.BABEL_CACHE_PATH = null;
+}
+
 describe("@babel/register", function () {
   let babelRegister;
 
   function setupRegister(config = { babelrc: false }) {
+    process.env.BABEL_CACHE_PATH = testCacheFilename;
     config = {
       cwd: path.dirname(testFile),
       ...config,
@@ -60,6 +74,7 @@ describe("@babel/register", function () {
       delete require.cache[registerFile];
       babelRegister = null;
     }
+    cleanCache();
   }
 
   afterEach(() => {
@@ -70,6 +85,10 @@ describe("@babel/register", function () {
     jest.resetModules();
   });
 
+  afterAll(() => {
+    resetCache();
+  });
+
   test("registers hook correctly", () => {
     setupRegister();