skip certain tests when installing yarn ignoring the lockfile

.github/workflows/nightly-tests.yml

@@ -11,6 +11,8 @@ on:
   schedule:
     # Daily at at 5:00 UTC
     - cron:  '0 5 * * *'
+  pull_request:
+    types: [opened, synchronize]
 
 jobs:
   test:
@@ -26,7 +28,6 @@ jobs:
           'current'  # newest
         ]
         no-lockfile: ['false', 'true']
-    name: "Tests [Node.js ${{ matrix.node-version }}, ${{ matrix.runs-on }}, ${{ matrix.no-lockfile == 'false' && 'Using yarn.lock' || 'Ignoring yarn.lock' }}]"
     uses: ./.github/workflows/test.yml
     with:
       node-version: ${{ matrix.node-version }}

.github/workflows/test.yml

@@ -27,3 +27,5 @@ jobs:
           no-lockfile: ${{ inputs.no-lockfile }}
       - name: Run Jest Tests
         run: yarn jest --ci --maxWorkers 4 --reporters=default --reporters=jest-junit --rootdir='./'
+        env:
+          YARN_INSTALL_NO_LOCKFILE: ${{ inputs.no-lockfile }}

package.json

@@ -86,6 +86,9 @@
     "setupFiles": [
       "<rootDir>/scripts/setupJest.js"
     ],
+    "setupFilesAfterEnv": [
+      "<rootDir>/scripts/setupJestAfterEnv.js"
+    ],
     "watchPlugins": [
       "jest-watch-typeahead/filename",
       "jest-watch-typeahead/testname"

scripts/jestFilter.js

@@ -0,0 +1,22 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @oncall react_native
+ */
+
+const ignoredTests = {
+  // "path/ending-with/test-name.js": ["test name 1", "test name 2"]
+};
+
+if (process.env.YARN_INSTALL_NO_LOCKFILE) {
+  // flaky babel types test - this should be removed once babel is updated
+  ignoredTests['__tests__/babel-lib-defs-test.js'] = [
+    'Babel Flow library definitions should be up to date',
+  ];
+}
+
+module.exports = ignoredTests;

scripts/setupJestAfterEnv.js

@@ -0,0 +1,31 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @oncall react_native
+ */
+
+import jestFilter from './jestFilter';
+import callsites from 'callsites';
+
+const origTest = test;
+global.test = (testName, ...args) => {
+  const calledFromFile = callsites()[1].getFileName();
+  const shouldSkip = Object.entries(jestFilter).some(
+    ([ignoredFile, ignoredTestNames]) => {
+      return (
+        calledFromFile.endsWith(ignoredFile) &&
+        ignoredTestNames.includes(testName)
+      );
+    },
+  );
+  return (shouldSkip ? origTest.skip : origTest)(testName, ...args);
+};
+Object.getOwnPropertyNames(origTest).forEach(propName => {
+  global.test[propName] = origTest[propName];
+});
+global.test;
+global.it = test;