chore: Check copyright and license as one joined substring (#8815)

* chore: Check copyright and license as one joined substring

* Update CHANGELOG.md

* Delete misleading comment

CHANGELOG.md

@@ -52,6 +52,7 @@
 - `[jest-core]` Add `getVersion` (moved from `jest-cli`) ([#8706](https://github.com/facebook/jest/pull/8706))
 - `[docs]` Fix MockFunctions example that was using toContain instead of toContainEqual ([#8765](https://github.com/facebook/jest/pull/8765))
 - `[*]` Make sure copyright header comment includes license ([#8783](https://github.com/facebook/jest/pull/8783))
+- `[*]` Check copyright and license as one joined substring ([#8815](https://github.com/facebook/jest/pull/8815))
 - `[docs]` Fix WatchPlugins `jestHooks.shouldRunTestSuite` example that receives an object ([#8784](https://github.com/facebook/jest/pull/8784))
 - `[*]` Enforce LF line endings ([#8809](https://github.com/facebook/jest/pull/8809))
 

scripts/checkCopyrightHeaders.js

@@ -115,24 +115,16 @@ const INCLUDED_PATTERNS = [
   /\.[^/]+$/,
 ];
 
-const COPYRIGHT_HEADER =
-  'Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.';
-const LICENSE1 =
-  'This source code is licensed under the MIT license found in the';
-const LICENSE2 = 'LICENSE file in the root directory of this source tree.';
+const COPYRIGHT_LICENSE = [
+  ' * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.',
+  ' *',
+  ' * This source code is licensed under the MIT license found in the',
+  ' * LICENSE file in the root directory of this source tree.',
+].join('\n');
 
 function needsCopyrightHeader(file) {
   const contents = getFileContents(file);
-
-  // Match lines individually to avoid false positive for:
-  // comment block versus lines
-  // line ending LF versus CRLF
-  return (
-    contents.trim().length > 0 &&
-    (!contents.includes(COPYRIGHT_HEADER) ||
-      !contents.includes(LICENSE1) ||
-      !contents.includes(LICENSE2))
-  );
+  return contents.trim().length > 0 && !contents.includes(COPYRIGHT_LICENSE);
 }
 
 function check() {