Function setupJestGlobals

packages/jest-jasmine2/src/setup_jest_globals.ts:93–121

({
  config,
  globalConfig,
  localRequire,
  testPath,
}: SetupOptions)

};

export default async function setupJestGlobals({
  config,
  globalConfig,
  localRequire,
  testPath,
}: SetupOptions): Promise<SnapshotState> {
  // Jest tests snapshotSerializers in order preceding built-in serializers.
  // Therefore, add in reverse because the last added is the first tested.
  for (let i = config.snapshotSerializers.length - 1; i >= 0; i--) {
    addSerializer(localRequire(config.snapshotSerializers[i]));
  }

  patchJasmine();
  const {expand, updateSnapshot} = globalConfig;
  const {prettierPath, rootDir, snapshotFormat} = config;
  const snapshotResolver = await buildSnapshotResolver(config, localRequire);
  const snapshotPath = snapshotResolver.resolveSnapshotPath(testPath);
  const snapshotState = new SnapshotState(snapshotPath, {
    expand,
    prettierPath,
    rootDir,
    snapshotFormat,
    updateSnapshot,
  });

  jestExpect.setState({snapshotState, testPath});
  // Return it back to the outer scope (test runner outside the VM).
  return snapshotState;
}