Flowify reporters in jest-cli #2 (#1151)

* Flowify reporters in jest-cli

* Cleanup some type annotations.

.eslintignore

@@ -1,7 +1,8 @@
-bin/
-docs/
+**/coverage/**
 **/node_modules/**
 **/vendor/**
-website/
-**/coverage/**
+bin/
+docs/
 packages/*/build/**
+types/**
+website/

packages/jest-cli/src/reporters/DefaultTestReporter.js

@@ -4,14 +4,34 @@
  * 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
  */
 'use strict';
 
+import type {AggregatedResult, TestResult} from 'types/TestResult';
+import type {Config} from 'types/Config';
+import type {Process} from 'types/Process';
+
 const chalk = require('chalk');
 const formatFailureMessage = require('jest-util').formatFailureMessage;
 const path = require('path');
 const VerboseLogger = require('./VerboseLogger');
 
+type SnapshotSummary = {
+  added: number,
+  didUpdate: boolean,
+  filesAdded: number,
+  filesRemoved: number,
+  filesUnmatched: number,
+  filesUpdated: number,
+  matched: number,
+  total: number,
+  unchecked: number,
+  unmatched: number,
+  updated: number,
+};
+
 // Explicitly reset for these messages since they can get written out in the
 // middle of error logging (should have listened to Spengler and not crossed the
 // streams).
@@ -34,23 +54,31 @@ const pluralize = (word, count) => `${count} ${word}${count === 1 ? '' : 's'}`;
 
 class DefaultTestReporter {
 
-  constructor(customProcess) {
+  _config: Config;
+  _process: Process;
+  verboseLogger: VerboseLogger;
+
+  constructor(customProcess: Process) {
     this._process = customProcess || process;
   }
 
-  log(string) {
-    this._process.stdout.write(string + '\n');
+  log(message: string) {
+    this._process.stdout.write(message + '\n');
   }
 
-  onRunStart(config, results) {
+  onRunStart(config: Config, results: AggregatedResult) {
     this._config = config;
     this._printWaitingOn(results);
     if (this._config.verbose) {
       this.verboseLogger = new VerboseLogger(this._process);
     }
   }
 
-  onTestResult(config, testResult, results) {
+  onTestResult(
+    config: Config,
+    testResult: TestResult,
+    results: AggregatedResult,
+  ) {
     this._clearWaitingOn();
 
     const pathStr =
@@ -105,7 +133,7 @@ class DefaultTestReporter {
     this._printWaitingOn(results);
   }
 
-  onRunComplete(config, aggregatedResults) {
+  onRunComplete(config: Config, aggregatedResults: AggregatedResult) {
     const totalTestSuites = aggregatedResults.numTotalTestSuites;
     const failedTests = aggregatedResults.numFailedTests;
     const passedTests = aggregatedResults.numPassedTests;
@@ -158,7 +186,7 @@ class DefaultTestReporter {
     return snapshotFailure ? false : aggregatedResults.success;
   }
 
-  _getSnapshotSummary(aggregatedResults) {
+  _getSnapshotSummary(aggregatedResults: AggregatedResult): SnapshotSummary {
     let added = 0;
     let filesAdded = 0;
     let filesRemoved = aggregatedResults.snapshotFilesRemoved;
@@ -204,7 +232,7 @@ class DefaultTestReporter {
     };
   }
 
-  _printSnapshotSummary(snapshots) {
+  _printSnapshotSummary(snapshots: SnapshotSummary) {
     if (
       snapshots.added ||
       snapshots.filesRemoved ||
@@ -265,7 +293,7 @@ class DefaultTestReporter {
     }
   }
 
-  _printSummary(aggregatedResults) {
+  _printSummary(aggregatedResults: AggregatedResult) {
     // If there were any failing tests and there was a large number of tests
     // executed, re-print the failing results at the end of execution output.
     const failedTests = aggregatedResults.numFailedTests;
@@ -305,7 +333,7 @@ class DefaultTestReporter {
     this._process.stdout.write(this._config.noHighlight ? '' : '\r\x1B[K');
   }
 
-  _printWaitingOn(results) {
+  _printWaitingOn(results: AggregatedResult) {
     const remaining = results.numTotalTestSuites -
       results.numPassedTestSuites -
       results.numFailedTestSuites -

packages/jest-cli/src/reporters/IstanbulTestReporter.js

@@ -4,6 +4,8 @@
 * 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
 */
 'use strict';
 
@@ -16,8 +18,15 @@ const reporter = new istanbul.Reporter();
 
 const FAIL_COLOR = chalk.bold.red;
 
+import type {Config} from 'types/Config';
+import type {AggregatedResult, TestResult} from 'types/TestResult';
+
 class IstanbulTestReporter extends DefaultTestReporter {
-  onTestResult(config, testResult, aggregatedResults) {
+  onTestResult(
+    config: Config,
+    testResult: TestResult,
+    aggregatedResults: AggregatedResult,
+  ) {
     super.onTestResult(config, testResult, aggregatedResults);
 
     if (config.collectCoverage && testResult.coverage) {
@@ -29,7 +38,7 @@ class IstanbulTestReporter extends DefaultTestReporter {
     }
   }
 
-  onRunComplete(config, aggregatedResults) {
+  onRunComplete(config: Config, aggregatedResults: AggregatedResult) {
     aggregatedResults.success = super.onRunComplete(config, aggregatedResults);
 
     if (config.collectCoverage) {

packages/jest-cli/src/reporters/VerboseLogger.js

@@ -4,25 +4,62 @@
  * 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
  */
 'use strict';
 
+import type {
+  AssertionResult,
+  Suite,
+} from 'types/TestResult';
+import type {Process} from 'types/Process';
+
 const chalk = require('chalk');
 
 class VerboseLogger {
-  constructor(customProcess) {
+  _process: Process;
+
+  constructor(customProcess?: ?Process) {
     this._process = customProcess || process;
   }
 
-  logTestResults(testResults) {
-    groupTestsBySuites(testResults).forEach(suite =>
+  static groupTestsBySuites(testResults: Array<AssertionResult>) {
+    const root: Suite = {
+      suites: [],
+      tests: [],
+      title: 'Root Suite',
+    };
+
+    testResults.forEach(testResult => {
+      let targetSuite = root;
+
+      // Find the target suite for this test,
+      // creating nested suites as necessary.
+      for (const title of testResult.ancestorTitles) {
+        let matchingSuite = targetSuite.suites.find(s => s.title === title);
+        if (!matchingSuite) {
+          matchingSuite = {title, suites: [], tests: []};
+          targetSuite.suites.push(matchingSuite);
+        }
+        targetSuite = matchingSuite;
+      }
+
+      targetSuite.tests.push(testResult);
+    });
+
+    return root.suites;
+  }
+
+  logTestResults(testResults: Array<AssertionResult>) {
+    VerboseLogger.groupTestsBySuites(testResults).forEach(suite =>
       this._logSuite(suite, 0)
     );
 
     this._logLine();
   }
 
-  _logSuite(suite, indentLevel) {
+  _logSuite(suite: Suite, indentLevel: number) {
     this._logLine(suite.title, indentLevel);
 
     suite.tests.forEach(test =>
@@ -34,7 +71,7 @@ class VerboseLogger {
     );
   }
 
-  _getIcon(status) {
+  _getIcon(status: string) {
     if (status === 'failed') {
       return chalk.red('\u2715');
     } else if (status === 'pending') {
@@ -44,42 +81,15 @@ class VerboseLogger {
     }
   }
 
-  _logTest(test, indentLevel) {
+  _logTest(test: AssertionResult, indentLevel: number) {
     const status = this._getIcon(test.status);
     this._logLine(`${status} ${chalk.gray(test.title)}`, indentLevel);
   }
 
-  _logLine(str, indentLevel) {
-    str = str || '';
-    indentLevel = indentLevel || 0;
-
+  _logLine(str: string = '', indentLevel: number = 0) {
     const indentation = '  '.repeat(indentLevel);
     this._process.stdout.write(`${indentation}${str}\n`);
   }
 }
 
-function groupTestsBySuites(testResults) {
-  const root = {suites: []};
-
-  testResults.forEach(testResult => {
-    let targetSuite = root;
-
-    // Find the target suite for this test,
-    // creating nested suites as necessary.
-    for (const title of testResult.ancestorTitles) {
-      let matchingSuite = targetSuite.suites.find(s => s.title === title);
-      if (!matchingSuite) {
-        matchingSuite = {title, suites: [], tests: []};
-        targetSuite.suites.push(matchingSuite);
-      }
-      targetSuite = matchingSuite;
-    }
-
-    targetSuite.tests.push(testResult);
-  });
-
-  return root.suites;
-}
-
-VerboseLogger.groupTestsBySuites = groupTestsBySuites;
 module.exports = VerboseLogger;

packages/jest-snapshot/src/SnapshotFile.js

@@ -25,6 +25,8 @@ export type MatchResult = {
   pass: boolean,
 };
 
+type SnapshotData = {[key: string]: string};
+
 type SaveStatus = {
   deleted: boolean,
   saved: boolean,
@@ -47,7 +49,7 @@ const fileExists = (filePath: Path): boolean => {
 
 class SnapshotFile {
 
-  _content: {[key: string]: any};
+  _content: SnapshotData;
   _dirty: boolean;
   _filename: Path;
   _uncheckedKeys: Set;
@@ -59,7 +61,9 @@ class SnapshotFile {
     this._content = Object.create(null);
     if (this.fileExists(filename)) {
       try {
+        /* eslint-disable no-useless-call */
         Object.assign(this._content, require.call(null, filename));
+        /* eslint-enable no-useless-call */
       } catch (e) {}
     }
     this._uncheckedKeys = new Set(Object.keys(this._content));

types/Config.js

@@ -26,6 +26,11 @@ export type Config = {
   colors: boolean,
   coverageCollector: Path,
   coverageReporters: Array<string>,
+  coverageThreshold: {
+    global: {
+      [key: string]: number,
+    },
+  },
   globals: ConfigGlobals,
   haste: HasteConfig,
   mocksPattern: string,

types/Process.js

@@ -0,0 +1,4 @@
+export interface Process {
+  stdout : stream$Writable | tty$WriteStream;
+  exit(code? : number) : void;
+};

types/TestResult.js

@@ -36,9 +36,32 @@ export type AssertionResult = {
   numPassingAsserts: number,
 };
 
+export type AggregatedResult = {
+  didUpdate: boolean,
+  numFailedTests: number,
+  numFailedTestSuites: number,
+  numPassedTests: number,
+  numPassedTestSuites: number,
+  numPendingTests: number,
+  numRuntimeErrorTestSuites: number,
+  numTotalTests: number,
+  numTotalTestSuites: number,
+  snapshotFilesRemoved: number,
+  startTime: number,
+  success: boolean,
+  testResults: Array<TestResult>,
+};
+
+export type Suite = {
+  title: string,
+  suites: Array<Suite>,
+  tests: Array<AssertionResult>,
+};
+
 export type TestResult = {
   coverage: ?Coverage,
   hasUncheckedKeys: boolean,
+  message: string,
   numFailingTests: number,
   numPassingTests: number,
   numPendingTests: number,