Function eventHandler

packages/jest-circus/src/eventHandler.ts:23–306

(event, state)

} from './utils';

const eventHandler: Circus.EventHandler = (event, state) => {
  switch (event.name) {
    case 'include_test_location_in_result': {
      state.includeTestLocationInResult = true;
      break;
    }
    case 'hook_start': {
      event.hook.seenDone = false;
      break;
    }
    case 'start_describe_definition': {
      const {blockName, mode} = event;
      const {currentDescribeBlock, currentlyRunningTest} = state;

      if (currentlyRunningTest) {
        currentlyRunningTest.errors.push(
          new Error(
            `Cannot nest a describe inside a test. Describe block "${blockName}" cannot run because it is nested within "${currentlyRunningTest.name}".`,
          ),
        );
        break;
      }

      const describeBlock = makeDescribe(blockName, currentDescribeBlock, mode);
      currentDescribeBlock.children.push(describeBlock);
      state.currentDescribeBlock = describeBlock;
      break;
    }
    case 'finish_describe_definition': {
      const {currentDescribeBlock} = state;
      invariant(currentDescribeBlock, 'currentDescribeBlock must be there');

      if (!describeBlockHasTests(currentDescribeBlock)) {
        for (const hook of currentDescribeBlock.hooks) {
          hook.asyncError.message = `Invalid: ${hook.type}() may not be used in a describe block containing no tests.`;
          state.unhandledErrors.push(hook.asyncError);
        }
      }

      // pass mode of currentDescribeBlock to tests
      // but do not when there is already a single test with "only" mode
      const shouldPassMode = !(
        currentDescribeBlock.mode === 'only' &&
        currentDescribeBlock.children.some(
          child => child.type === 'test' && child.mode === 'only',
        )
      );
      if (shouldPassMode) {
        for (const child of currentDescribeBlock.children) {
          if (child.type === 'test' && !child.mode) {
            child.mode = currentDescribeBlock.mode;
          }
        }
      }
      if (
        !state.hasFocusedTests &&
        currentDescribeBlock.mode !== 'skip' &&
        currentDescribeBlock.children.some(