Replace Jasmine with jest-circus (#3668)

* [WIP] jest-framework

[WIP] jest-framework

[WIP] jest-framework

[WIP] Integrating with Jest

[WIP] jest-framework

[WIP] jest-framework

[WIP] jest-framework

* afterAll hook fix

* framework -> circus

packages/jest-circus/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "jest-circus",
+  "version": "20.0.3",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/facebook/jest.git"
+  },
+  "license": "BSD-3-Clause",
+  "main": "build/index.js",
+  "dependencies": {
+    "jest-snapshot": "^20.0.3",
+    "jest-matchers": "^20.0.3",
+    "jest-message-util": "^20.0.3"
+  },
+  "devDependencies": {
+    "jest-runtime": "^20.0.3"
+  }
+}

packages/jest-circus/src/eventHandler.js

@@ -0,0 +1,84 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @flow
+ */
+
+import type {EventHandler} from '../types';
+
+const {makeDescribe, getTestDuration, makeTest} = require('./utils');
+
+// To pass this value from Runtime object to state we need to use global[sym]
+const TEST_TIMEOUT_SYMBOL = Symbol.for('TEST_TIMEOUT_SYMBOL');
+
+const handler: EventHandler = (event, state): void => {
+  switch (event.name) {
+    case 'hook_start': {
+      break;
+    }
+    case 'start_describe_definition': {
+      const {blockName, mode} = event;
+      const {currentDescribeBlock} = state;
+      const describeBlock = makeDescribe(blockName, currentDescribeBlock, mode);
+      currentDescribeBlock.children.push(describeBlock);
+      state.currentDescribeBlock = describeBlock;
+      break;
+    }
+    case 'finish_describe_definition': {
+      const {currentDescribeBlock} = state;
+      if (!currentDescribeBlock) {
+        throw new Error(
+          `"currentDescribeBlock" has to be there since we're finishing its definition.`,
+        );
+      }
+      if (currentDescribeBlock.parent) {
+        state.currentDescribeBlock = currentDescribeBlock.parent;
+      }
+      break;
+    }
+    case 'add_hook': {
+      const {currentDescribeBlock} = state;
+      const {fn, hookType: type} = event;
+      currentDescribeBlock.hooks.push({fn, type});
+      break;
+    }
+    case 'add_test': {
+      const {currentDescribeBlock} = state;
+      const {fn, mode, testName: name} = event;
+      const test = makeTest(fn, mode, name, currentDescribeBlock);
+      test.mode === 'only' && (state.hasFocusedTests = true);
+      currentDescribeBlock.tests.push(test);
+      break;
+    }
+    case 'test_start': {
+      event.test.startedAt = Date.now();
+      break;
+    }
+    case 'test_skip': {
+      event.test.status = 'skip';
+      break;
+    }
+    case 'test_failure': {
+      event.test.status = 'fail';
+      event.test.duration = getTestDuration(event.test);
+      event.test.errors.push(event.error);
+      break;
+    }
+    case 'test_success': {
+      event.test.status = 'pass';
+      event.test.duration = getTestDuration(event.test);
+      break;
+    }
+    case 'run_start': {
+      global[TEST_TIMEOUT_SYMBOL] &&
+        (state.testTimeout = global[TEST_TIMEOUT_SYMBOL]);
+      break;
+    }
+  }
+};
+
+module.exports = handler;

packages/jest-circus/src/index.js

@@ -0,0 +1,58 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @flow
+ */
+
+import type {
+  BlockFn,
+  HookFn,
+  HookType,
+  TestFn,
+  BlockMode,
+  BlockName,
+  TestName,
+} from '../types';
+const {dispatch} = require('./state');
+
+const describe = (blockName: BlockName, blockFn: BlockFn) =>
+  _dispatchDescribe(blockFn, blockName);
+describe.only = (blockName: BlockName, blockFn: BlockFn) =>
+  _dispatchDescribe(blockFn, blockName, 'only');
+describe.skip = (blockName: BlockName, blockFn: BlockFn) =>
+  _dispatchDescribe(blockFn, blockName, 'skip');
+
+const _dispatchDescribe = (blockFn, blockName, mode?: BlockMode) => {
+  dispatch({blockName, mode, name: 'start_describe_definition'});
+  blockFn();
+  dispatch({name: 'finish_describe_definition'});
+};
+
+const _addHook = (fn: HookFn, hookType: HookType) =>
+  dispatch({fn, hookType, name: 'add_hook'});
+const beforeEach = (fn: HookFn) => _addHook(fn, 'beforeEach');
+const beforeAll = (fn: HookFn) => _addHook(fn, 'beforeAll');
+const afterEach = (fn: HookFn) => _addHook(fn, 'afterEach');
+const afterAll = (fn: HookFn) => _addHook(fn, 'afterAll');
+
+const test = (testName: TestName, fn?: TestFn) =>
+  dispatch({fn, name: 'add_test', testName});
+const it = test;
+test.skip = (testName: TestName, fn?: TestFn) =>
+  dispatch({fn, mode: 'skip', name: 'add_test', testName});
+test.only = (testName: TestName, fn: TestFn) =>
+  dispatch({fn, mode: 'only', name: 'add_test', testName});
+
+module.exports = {
+  afterAll,
+  afterEach,
+  beforeAll,
+  beforeEach,
+  describe,
+  it,
+  test,
+};

packages/jest-circus/src/legacy_code_todo_rewrite/jest-adapter-init.js

@@ -0,0 +1,174 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @flow
+ */
+
+import type {TestResult, Status} from 'types/TestResult';
+import type {GlobalConfig, Path, ProjectConfig} from 'types/Config';
+import type {Event, TestEntry} from '../../types';
+
+const {getState, setState} = require('jest-matchers');
+const {formatResultsErrors} = require('jest-message-util');
+const {SnapshotState, addSerializer} = require('jest-snapshot');
+const {addEventHandler, ROOT_DESCRIBE_BLOCK_NAME} = require('../state');
+const {getTestID} = require('../utils');
+const run = require('../run');
+const globals = require('../index');
+
+const initialize = ({
+  config,
+  globalConfig,
+  localRequire,
+  testPath,
+}: {
+  config: ProjectConfig,
+  globalConfig: GlobalConfig,
+  localRequire: Path => any,
+  testPath: Path,
+}) => {
+  Object.assign(global, globals);
+
+  addEventHandler(eventHandler);
+
+  // Jest tests snapshotSerializers in order preceding built-in serializers.
+  // Therefore, add in reverse because the last added is the first tested.
+  config.snapshotSerializers.concat().reverse().forEach(path => {
+    addSerializer(localRequire(path));
+  });
+
+  const {expand, updateSnapshot} = globalConfig;
+  const snapshotState = new SnapshotState(testPath, {expand, updateSnapshot});
+  setState({snapshotState, testPath});
+
+  // Return it back to the outer scope (test runner outside the VM).
+  return {globals, snapshotState};
+};
+
+const runAndTransformResultsToJestFormat = async ({
+  config,
+  globalConfig,
+  testPath,
+}: {
+  config: ProjectConfig,
+  globalConfig: GlobalConfig,
+  testPath: string,
+}): Promise<TestResult> => {
+  const result = await run();
+
+  let numFailingTests = 0;
+  let numPassingTests = 0;
+  let numPendingTests = 0;
+
+  for (const testResult of result) {
+    switch (testResult.status) {
+      case 'fail':
+        numFailingTests += 1;
+        break;
+      case 'pass':
+        numPassingTests += 1;
+        break;
+      case 'skip':
+        numPendingTests += 1;
+        break;
+    }
+  }
+
+  const assertionResults = result.map(testResult => {
+    let status: Status;
+    switch (testResult.status) {
+      case 'fail':
+        status = 'failed';
+        break;
+      case 'pass':
+        status = 'passed';
+        break;
+      case 'skip':
+        status = 'skipped';
+        break;
+    }
+
+    const ancestorTitles = testResult.testPath.filter(
+      name => name !== ROOT_DESCRIBE_BLOCK_NAME,
+    );
+    const title = ancestorTitles.pop();
+
+    // $FlowFixMe Types are slightly incompatible and need to be refactored
+    return {
+      ancestorTitles,
+      duration: testResult.duration,
+      failureMessages: testResult.errors,
+      fullName: ancestorTitles.concat(title).join(' '),
+      numPassingAsserts: 0,
+      status,
+      title: testResult.testPath[testResult.testPath.length - 1],
+    };
+  });
+
+  const failureMessage = formatResultsErrors(
+    assertionResults,
+    config,
+    globalConfig,
+    testPath,
+  );
+
+  return {
+    console: null,
+    failureMessage,
+    numFailingTests,
+    numPassingTests,
+    numPendingTests,
+    perfStats: {
+      // populated outside
+      end: 0,
+      start: 0,
+    },
+    skipped: false,
+    snapshot: {
+      added: 0,
+      fileDeleted: false,
+      matched: 0,
+      unchecked: 0,
+      unmatched: 0,
+      updated: 0,
+    },
+    sourceMaps: {},
+    testFilePath: testPath,
+    testResults: assertionResults,
+  };
+};
+
+const eventHandler = (event: Event) => {
+  switch (event.name) {
+    case 'test_start': {
+      setState({currentTestName: getTestID(event.test)});
+      break;
+    }
+    case 'test_success':
+    case 'test_failure': {
+      _addSuppressedErrors(event.test);
+      break;
+    }
+  }
+};
+
+// Get suppressed errors from ``jest-matchers`` that weren't throw during
+// test execution and add them to the test result, potentially failing
+// a passing test.
+const _addSuppressedErrors = (test: TestEntry) => {
+  const {suppressedErrors} = getState();
+  setState({suppressedErrors: []});
+  if (suppressedErrors.length) {
+    test.status = 'fail';
+    test.errors = test.errors.concat(suppressedErrors);
+  }
+};
+
+module.exports = {
+  initialize,
+  runAndTransformResultsToJestFormat,
+};