chore: migrate jest-resolve-dependencies to TypeScript

packages/jest-resolve-dependencies/package.json

@@ -8,10 +8,20 @@
   },
   "license": "MIT",
   "main": "build/index.js",
+  "types": "build/index.d.ts",
   "dependencies": {
+    "@jest/types": "^24.1.0",
     "jest-regex-util": "^24.0.0",
     "jest-snapshot": "^24.1.0"
   },
+  "devDependencies": {
+    "jest-haste-map": "^24.0.0",
+    "jest-resolve": "^24.1.0"
+  },
+  "peerDependencies": {
+    "jest-haste-map": "^24.0.0",
+    "jest-resolve": "^24.1.0"
+  },
   "engines": {
     "node": ">= 6"
   },

packages/jest-resolve-dependencies/src/__tests__/dependency_resolver.test.js → packages/jest-resolve-dependencies/src/__tests__/dependency_resolver.test.ts

@@ -7,20 +7,24 @@
  */
 'use strict';
 
-const path = require('path');
-const {normalize} = require('jest-config');
-const {buildSnapshotResolver} = require('jest-snapshot');
-const DependencyResolver = require('../index');
+import path from 'path';
+import {Config} from '@jest/types';
+// @ts-ignore
+import {normalize} from 'jest-config';
+import {buildSnapshotResolver} from 'jest-snapshot';
+
+import DependencyResolver from '../index';
 
 const maxWorkers = 1;
-let dependencyResolver;
+let dependencyResolver: DependencyResolver;
 let Runtime;
-let config;
-const cases = {
+let config: Config.ProjectConfig;
+const cases: {[key: string]: jest.Mock} = {
   fancyCondition: jest.fn(path => path.length > 10),
   testRegex: jest.fn(path => /.test.js$/.test(path)),
 };
-const filter = path => Object.keys(cases).every(key => cases[key](path));
+const filter = (path: Config.Path) =>
+  Object.keys(cases).every(key => cases[key](path));
 
 beforeEach(() => {
   Runtime = require('jest-runtime');
@@ -31,7 +35,7 @@ beforeEach(() => {
     },
     {},
   ).options;
-  return Runtime.createContext(config, {maxWorkers}).then(hasteMap => {
+  return Runtime.createContext(config, {maxWorkers}).then((hasteMap: any) => {
     dependencyResolver = new DependencyResolver(
       hasteMap.resolver,
       hasteMap.hasteFS,

packages/jest-resolve-dependencies/src/index.js → packages/jest-resolve-dependencies/src/index.ts

@@ -3,18 +3,11 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- * @flow
  */
 
-import type {HasteFS} from 'types/HasteMap';
-import type {Path} from 'types/Config';
-import type {
-  Resolver,
-  ResolveModuleConfig,
-  ResolvedModule,
-} from 'types/Resolve';
-import type {SnapshotResolver} from 'types/SnapshotResolver';
+import {Config, Resolve, Snapshot} from '@jest/types';
+import {FS as HasteFS} from 'jest-haste-map';
+import Resolver from 'jest-resolve';
 import {isSnapshotPath} from 'jest-snapshot';
 
 /**
@@ -24,25 +17,28 @@ import {isSnapshotPath} from 'jest-snapshot';
 class DependencyResolver {
   _hasteFS: HasteFS;
   _resolver: Resolver;
-  _snapshotResolver: SnapshotResolver;
+  _snapshotResolver: Snapshot.SnapshotResolver;
 
   constructor(
     resolver: Resolver,
     hasteFS: HasteFS,
-    snapshotResolver: SnapshotResolver,
+    snapshotResolver: Snapshot.SnapshotResolver,
   ) {
     this._resolver = resolver;
     this._hasteFS = hasteFS;
     this._snapshotResolver = snapshotResolver;
   }
 
-  resolve(file: Path, options?: ResolveModuleConfig): Array<Path> {
+  resolve(
+    file: Config.Path,
+    options?: Resolve.ResolveModuleConfig,
+  ): Array<Config.Path> {
     const dependencies = this._hasteFS.getDependencies(file);
     if (!dependencies) {
       return [];
     }
 
-    return dependencies.reduce((acc, dependency) => {
+    return dependencies.reduce<Array<Config.Path>>((acc, dependency) => {
       if (this._resolver.isCoreModule(dependency)) {
         return acc;
       }
@@ -66,23 +62,27 @@ class DependencyResolver {
   }
 
   resolveInverseModuleMap(
-    paths: Set<Path>,
-    filter: (file: Path) => boolean,
-    options?: ResolveModuleConfig,
-  ): Array<ResolvedModule> {
+    paths: Set<Config.Path>,
+    filter: (file: Config.Path) => boolean,
+    options?: Resolve.ResolveModuleConfig,
+  ): Array<Resolve.ResolvedModule> {
     if (!paths.size) {
       return [];
     }
 
-    const collectModules = (related, moduleMap, changed) => {
+    const collectModules = (
+      related: Set<Config.Path>,
+      moduleMap: Array<Resolve.ResolvedModule>,
+      changed: Set<Config.Path>,
+    ) => {
       const visitedModules = new Set();
-      const result: Array<ResolvedModule> = [];
+      const result: Array<Resolve.ResolvedModule> = [];
       while (changed.size) {
         changed = new Set(
-          moduleMap.reduce((acc, module) => {
+          moduleMap.reduce<Array<Config.Path>>((acc, module) => {
             if (
               visitedModules.has(module.file) ||
-              !module.dependencies.some(dep => dep && changed.has(dep))
+              !module.dependencies.some(dep => changed.has(dep))
             ) {
               return acc;
             }
@@ -98,11 +98,13 @@ class DependencyResolver {
           }, []),
         );
       }
-      return result.concat(Array.from(related).map(file => ({file})));
+      return result.concat(
+        Array.from(related).map(file => ({dependencies: [], file})),
+      );
     };
 
-    const relatedPaths = new Set<Path>();
-    const changed = new Set();
+    const relatedPaths = new Set<Config.Path>();
+    const changed: Set<Config.Path> = new Set();
     for (const path of paths) {
       if (this._hasteFS.exists(path)) {
         const modulePath = isSnapshotPath(path)
@@ -114,7 +116,7 @@ class DependencyResolver {
         }
       }
     }
-    const modules = [];
+    const modules: Array<Resolve.ResolvedModule> = [];
     for (const file of this._hasteFS.getAbsoluteFileIterator()) {
       modules.push({
         dependencies: this.resolve(file, options),
@@ -125,14 +127,14 @@ class DependencyResolver {
   }
 
   resolveInverse(
-    paths: Set<Path>,
-    filter: (file: Path) => boolean,
-    options?: ResolveModuleConfig,
-  ): Array<Path> {
+    paths: Set<Config.Path>,
+    filter: (file: Config.Path) => boolean,
+    options?: Resolve.ResolveModuleConfig,
+  ): Array<Config.Path> {
     return this.resolveInverseModuleMap(paths, filter, options).map(
       module => module.file,
     );
   }
 }
 
-module.exports = DependencyResolver;
+export = DependencyResolver;

packages/jest-resolve-dependencies/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "build"
+  },
+  "references": [
+    {"path": "../jest-regex-util"},
+    {"path": "../jest-snapshot"},
+    {"path": "../jest-types"}
+  ]
+}

packages/jest-resolve/src/index.ts

@@ -6,7 +6,7 @@
  */
 
 import path from 'path';
-import {Config} from '@jest/types';
+import {Config, Resolve} from '@jest/types';
 import {ModuleMap} from 'jest-haste-map';
 import {sync as realpath} from 'realpath-native';
 import chalk from 'chalk';
@@ -15,11 +15,6 @@ import isBuiltinModule from './isBuiltinModule';
 import defaultResolver from './defaultResolver';
 import {ResolverConfig} from './types';
 
-type ResolveModuleConfig = {
-  skipNodeResolution?: boolean;
-  paths?: Config.Path[];
-};
-
 type FindNodeModuleConfig = {
   basedir: Config.Path;
   browser?: boolean;
@@ -102,7 +97,7 @@ class Resolver {
   resolveModuleFromDirIfExists(
     dirname: Config.Path,
     moduleName: string,
-    options?: ResolveModuleConfig,
+    options?: Resolve.ResolveModuleConfig,
   ): Config.Path | null {
     const paths = (options && options.paths) || this._options.modulePaths;
     const moduleDirectory = this._options.moduleDirectories;
@@ -185,7 +180,7 @@ class Resolver {
   resolveModule(
     from: Config.Path,
     moduleName: string,
-    options?: ResolveModuleConfig,
+    options?: Resolve.ResolveModuleConfig,
   ): Config.Path {
     const dirname = path.dirname(from);
     const module = this.resolveModuleFromDirIfExists(

packages/jest-types/src/Resolve.ts

@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import {Path} from './Config';
+
+export type ResolveModuleConfig = {
+  skipNodeResolution?: boolean;
+  paths?: Path[];
+};
+export type ResolvedModule = {
+  file: Path;
+  dependencies: Path[];
+};

packages/jest-types/src/Snapshot.ts

@@ -0,0 +1,14 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import {Path} from './Config';
+
+export type SnapshotResolver = {
+  testPathForConsistencyCheck: string;
+  resolveSnapshotPath(testPath: Path, extension?: string): Path;
+  resolveTestPath(snapshotPath: Path, extension?: string): Path;
+};

packages/jest-types/src/index.ts

@@ -7,10 +7,22 @@
 
 import * as Config from './Config';
 import * as Console from './Console';
-import * as SourceMaps from './SourceMaps';
-import * as TestResult from './TestResult';
+import * as Matchers from './Matchers';
 import * as Mocks from './Mocks';
 import * as PrettyFormat from './PrettyFormat';
-import * as Matchers from './Matchers';
+import * as Resolve from './Resolve';
+import * as Snapshot from './Snapshot';
+import * as SourceMaps from './SourceMaps';
+import * as TestResult from './TestResult';
 
-export {Config, Console, SourceMaps, TestResult, Mocks, PrettyFormat, Matchers};
+export {
+  Config,
+  Console,
+  Matchers,
+  Mocks,
+  PrettyFormat,
+  Resolve,
+  Snapshot,
+  SourceMaps,
+  TestResult,
+};