decentralize pretty-format types (#7972)

CHANGELOG.md

@@ -25,7 +25,7 @@
 ### Chore & Maintenance
 
 - `[*]`: Setup building, linting and testing of TypeScript ([#7808](https://github.com/facebook/jest/pull/7808), [#7855](https://github.com/facebook/jest/pull/7855), [#7951](https://github.com/facebook/jest/pull/7951))
-- `[pretty-format]`: Migrate to TypeScript ([#7809](https://github.com/facebook/jest/pull/7809))
+- `[pretty-format]`: Migrate to TypeScript ([#7809](https://github.com/facebook/jest/pull/7809), [#7809](https://github.com/facebook/jest/pull/7972))
 - `[diff-sequences]`: Migrate to Typescript ([#7820](https://github.com/facebook/jest/pull/7820))
 - `[jest-get-type]`: Migrate to TypeScript ([#7818](https://github.com/facebook/jest/pull/7818))
 - `[jest-regex-util]`: Migrate to TypeScript ([#7822](https://github.com/facebook/jest/pull/7822))

packages/jest-snapshot/src/mock_serializer.ts

@@ -5,9 +5,9 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import {PrettyFormat} from '@jest/types';
+import {NewPlugin} from 'pretty-format';
 
-export const serialize: PrettyFormat.NewPlugin['serialize'] = (
+export const serialize: NewPlugin['serialize'] = (
   val,
   config,
   indentation,
@@ -42,9 +42,8 @@ export const serialize: PrettyFormat.NewPlugin['serialize'] = (
   return '[MockFunction' + nameString + ']' + callsString;
 };
 
-export const test: PrettyFormat.NewPlugin['test'] = val =>
-  val && !!val._isMockFunction;
+export const test: NewPlugin['test'] = val => val && !!val._isMockFunction;
 
-const plugin: PrettyFormat.NewPlugin = {serialize, test};
+const plugin: NewPlugin = {serialize, test};
 
 export default plugin;

packages/jest-snapshot/src/plugins.ts

@@ -5,8 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import prettyFormat from 'pretty-format';
-import {PrettyFormat} from '@jest/types';
+import prettyFormat, {Plugin, Plugins} from 'pretty-format';
 
 import jestMockSerializer from './mock_serializer';
 
@@ -19,7 +18,7 @@ const {
   AsymmetricMatcher,
 } = prettyFormat.plugins;
 
-let PLUGINS: PrettyFormat.Plugins = [
+let PLUGINS: Plugins = [
   ReactTestComponent,
   ReactElement,
   DOMElement,
@@ -30,7 +29,7 @@ let PLUGINS: PrettyFormat.Plugins = [
 ];
 
 // Prepend to list so the last added is the first tested.
-export const addSerializer = (plugin: PrettyFormat.Plugin) => {
+export const addSerializer = (plugin: Plugin) => {
   PLUGINS = [plugin].concat(PLUGINS);
 };
 

packages/jest-types/src/index.ts

@@ -8,19 +8,9 @@
 import * as Config from './Config';
 import * as Console from './Console';
 import * as Matchers from './Matchers';
-import * as PrettyFormat from './PrettyFormat';
 import * as SourceMaps from './SourceMaps';
 import * as TestResult from './TestResult';
 import * as Global from './Global';
 import * as Environment from './Environment';
 
-export {
-  Config,
-  Console,
-  Matchers,
-  PrettyFormat,
-  SourceMaps,
-  TestResult,
-  Global,
-  Environment,
-};
+export {Config, Console, Matchers, SourceMaps, TestResult, Global, Environment};

packages/pretty-format/src/index.ts

@@ -6,17 +6,7 @@
  */
 
 import style from 'ansi-styles';
-import {
-  Colors,
-  Config,
-  Options,
-  OptionsReceived,
-  NewPlugin,
-  Plugin,
-  Plugins,
-  Refs,
-  Theme,
-} from './types';
+import * as PrettyFormat from './types';
 
 import {
   printIteratorEntries,
@@ -179,10 +169,10 @@ function printBasicValue(
  */
 function printComplexValue(
   val: any,
-  config: Config,
+  config: PrettyFormat.Config,
   indentation: string,
   depth: number,
-  refs: Refs,
+  refs: PrettyFormat.Refs,
   hasCalledToJSON?: boolean,
 ): string {
   if (refs.indexOf(val) !== -1) {
@@ -261,17 +251,19 @@ function printComplexValue(
         '}';
 }
 
-function isNewPlugin(plugin: Plugin): plugin is NewPlugin {
-  return (plugin as NewPlugin).serialize != null;
+function isNewPlugin(
+  plugin: PrettyFormat.Plugin,
+): plugin is PrettyFormat.NewPlugin {
+  return (plugin as PrettyFormat.NewPlugin).serialize != null;
 }
 
 function printPlugin(
-  plugin: Plugin,
+  plugin: PrettyFormat.Plugin,
   val: any,
-  config: Config,
+  config: PrettyFormat.Config,
   indentation: string,
   depth: number,
-  refs: Refs,
+  refs: PrettyFormat.Refs,
 ): string {
   let printed;
 
@@ -306,7 +298,7 @@ function printPlugin(
   return printed;
 }
 
-function findPlugin(plugins: Plugins, val: any) {
+function findPlugin(plugins: PrettyFormat.Plugins, val: any) {
   for (let p = 0; p < plugins.length; p++) {
     try {
       if (plugins[p].test(val)) {
@@ -322,10 +314,10 @@ function findPlugin(plugins: Plugins, val: any) {
 
 function printer(
   val: any,
-  config: Config,
+  config: PrettyFormat.Config,
   indentation: string,
   depth: number,
-  refs: Refs,
+  refs: PrettyFormat.Refs,
   hasCalledToJSON?: boolean,
 ): string {
   const plugin = findPlugin(config.plugins, val);
@@ -353,7 +345,7 @@ function printer(
   );
 }
 
-const DEFAULT_THEME: Theme = {
+const DEFAULT_THEME: PrettyFormat.Theme = {
   comment: 'gray',
   content: 'reset',
   prop: 'yellow',
@@ -363,7 +355,7 @@ const DEFAULT_THEME: Theme = {
 
 const DEFAULT_THEME_KEYS = Object.keys(DEFAULT_THEME);
 
-const DEFAULT_OPTIONS: Options = {
+const DEFAULT_OPTIONS: PrettyFormat.Options = {
   callToJSON: true,
   escapeRegex: false,
   escapeString: true,
@@ -376,7 +368,7 @@ const DEFAULT_OPTIONS: Options = {
   theme: DEFAULT_THEME,
 };
 
-function validateOptions(options: OptionsReceived) {
+function validateOptions(options: PrettyFormat.OptionsReceived) {
   Object.keys(options).forEach(key => {
     if (!DEFAULT_OPTIONS.hasOwnProperty(key)) {
       throw new Error(`pretty-format: Unknown option "${key}".`);
@@ -402,7 +394,9 @@ function validateOptions(options: OptionsReceived) {
   }
 }
 
-const getColorsHighlight = (options: OptionsReceived): Colors =>
+const getColorsHighlight = (
+  options: PrettyFormat.OptionsReceived,
+): PrettyFormat.Colors =>
   DEFAULT_THEME_KEYS.reduce((colors, key) => {
     const value =
       options.theme && (options.theme as any)[key] !== undefined
@@ -423,28 +417,30 @@ const getColorsHighlight = (options: OptionsReceived): Colors =>
     return colors;
   }, Object.create(null));
 
-const getColorsEmpty = (): Colors =>
+const getColorsEmpty = (): PrettyFormat.Colors =>
   DEFAULT_THEME_KEYS.reduce((colors, key) => {
     colors[key] = {close: '', open: ''};
     return colors;
   }, Object.create(null));
 
-const getPrintFunctionName = (options?: OptionsReceived) =>
+const getPrintFunctionName = (options?: PrettyFormat.OptionsReceived) =>
   options && options.printFunctionName !== undefined
     ? options.printFunctionName
     : DEFAULT_OPTIONS.printFunctionName;
 
-const getEscapeRegex = (options?: OptionsReceived) =>
+const getEscapeRegex = (options?: PrettyFormat.OptionsReceived) =>
   options && options.escapeRegex !== undefined
     ? options.escapeRegex
     : DEFAULT_OPTIONS.escapeRegex;
 
-const getEscapeString = (options?: OptionsReceived) =>
+const getEscapeString = (options?: PrettyFormat.OptionsReceived) =>
   options && options.escapeString !== undefined
     ? options.escapeString
     : DEFAULT_OPTIONS.escapeString;
 
-const getConfig = (options?: OptionsReceived): Config => ({
+const getConfig = (
+  options?: PrettyFormat.OptionsReceived,
+): PrettyFormat.Config => ({
   callToJSON:
     options && options.callToJSON !== undefined
       ? options.callToJSON
@@ -486,7 +482,10 @@ function createIndent(indent: number): string {
  * @param val any potential JavaScript object
  * @param options Custom settings
  */
-function prettyFormat(val: any, options?: OptionsReceived): string {
+function prettyFormat(
+  val: any,
+  options?: PrettyFormat.OptionsReceived,
+): string {
   if (options) {
     validateOptions(options);
     if (options.plugins) {
@@ -520,4 +519,17 @@ prettyFormat.plugins = {
   ReactTestComponent,
 };
 
+/* eslint-disable-next-line no-redeclare */
+namespace prettyFormat {
+  export type Colors = PrettyFormat.Colors;
+  export type Config = PrettyFormat.Config;
+  export type Options = PrettyFormat.Options;
+  export type OptionsReceived = PrettyFormat.OptionsReceived;
+  export type NewPlugin = PrettyFormat.NewPlugin;
+  export type Plugin = PrettyFormat.Plugin;
+  export type Plugins = PrettyFormat.Plugins;
+  export type Refs = PrettyFormat.Refs;
+  export type Theme = PrettyFormat.Theme;
+}
+
 export = prettyFormat;