chore: build babel-polyfill-dist on make watch

Makefile

@@ -75,8 +75,8 @@ build-no-bundle: clean clean-lib
 	BABEL_ENV=development $(YARN) gulp build-no-bundle
 	# Ensure that build artifacts for types are created during local
 	# development too.
-	$(MAKE) generate-type-helpers
-	$(MAKE) build-typings
+	# Babel-transform-fixture-test-runner requires minified polyfill for performance
+	$(MAKE) generate-type-helpers build-typings build-polyfill-dist
 
 build-no-bundle-ci: bootstrap-only
 	$(MAKE) build-no-bundle

packages/babel-helper-transform-fixture-test-runner/src/index.js

@@ -18,6 +18,7 @@ import QuickLRU from "quick-lru";
 
 import diff from "jest-diff";
 
+const babelPolyfillPath = resolve.sync("@babel/polyfill/dist/polyfill.min.js");
 const cachedScripts = new QuickLRU({ maxSize: 10 });
 const contextModuleCache = new WeakMap();
 const sharedTestContext = createContext();
@@ -38,12 +39,7 @@ function createContext() {
 
   // Initialize the test context with the polyfill, and then freeze the global to prevent implicit
   // global creation in tests, which could cause things to bleed between tests.
-  runModuleInTestContext(
-    "@babel/polyfill/dist/polyfill.min",
-    __filename,
-    context,
-    moduleCache,
-  );
+  runModuleInTestContext(babelPolyfillPath, __filename, context, moduleCache);
 
   // Populate the "babelHelpers" global with Babel's helper utilities.
   runCacheableScriptInTestContext(