Function readValue

packages/react-devtools-shared/src/__tests__/store-test.js:27–54

(promise)

  let withErrorsOrWarningsIgnored;

  function readValue(promise) {
    if (typeof React.use === 'function') {
      return React.use(promise);
    }

    // Support for React < 19.0
    switch (promise.status) {
      case 'fulfilled':
        return promise.value;
      case 'rejected':
        throw promise.reason;
      case 'pending':
        throw promise;
      default:
        promise.status = 'pending';
        promise.then(
          value => {
            promise.status = 'fulfilled';
            promise.value = value;
          },
          reason => {
            promise.status = 'rejected';
            promise.reason = reason;
          },
        );
        throw promise;
    }
  }

  beforeAll(() => {
    // JSDDOM doesn't implement getClientRects so we're just faking one for testing purposes