feat: make prettier optional for inline snapshots (#7792)

Co-authored-by: Simen Bekkhus <sbekkhus91@gmail.com>
Co-authored-by: Tim Seckinger <seckinger.tim@gmail.com>

Author: 3 people

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - `[jest-config]` [**BREAKING**] Default to Node testing environment instead of browser (JSDOM) ([#9874](https://github.com/facebook/jest/pull/9874))
 - `[jest-runner]` [**BREAKING**] set exit code to 1 if test logs after teardown ([#10728](https://github.com/facebook/jest/pull/10728))
+- `[jest-snapshot]`: [**BREAKING**] Make prettier optional for inline snapshots - fall back to string replacement ([#7792](https://github.com/facebook/jest/pull/7792))
 
 ### Fixes
 

packages/babel-plugin-jest-hoist/src/__tests__/__snapshots__/hoistPlugin.test.ts.snap

@@ -12,14 +12,14 @@ _getJestObj().mock("./App", () => () =>
   /*#__PURE__*/ _jsxDEV(
     "div",
     {
-      children: "Hello world"
+      children: "Hello world",
     },
     void 0,
     false,
     {
       fileName: _jsxFileName,
       lineNumber: 1,
-      columnNumber: 32
+      columnNumber: 32,
     },
     this
   )

packages/jest-circus/package.json

@@ -15,11 +15,9 @@
     "./runner": "./runner.js"
   },
   "dependencies": {
-    "@babel/traverse": "^7.1.0",
     "@jest/environment": "^26.6.2",
     "@jest/test-result": "^26.6.2",
     "@jest/types": "^26.6.2",
-    "@types/babel__traverse": "^7.0.4",
     "@types/node": "*",
     "chalk": "^4.0.0",
     "co": "^4.6.0",
@@ -41,7 +39,6 @@
     "@babel/core": "^7.1.0",
     "@babel/register": "^7.0.0",
     "@jest/test-utils": "^26.6.2",
-    "@types/babel__traverse": "^7.0.4",
     "@types/co": "^4.6.0",
     "@types/dedent": "^0.7.0",
     "@types/graceful-fs": "^4.1.3",

packages/jest-circus/src/legacy-code-todo-rewrite/jestAdapter.ts

@@ -30,15 +30,9 @@ const jestAdapter = async (
     FRAMEWORK_INITIALIZER,
   );
 
-  const getPrettier = () =>
-    config.prettierPath ? require(config.prettierPath) : null;
-  const getBabelTraverse = () => require('@babel/traverse').default;
-
   const {globals, snapshotState} = await initialize({
     config,
     environment,
-    getBabelTraverse,
-    getPrettier,
     globalConfig,
     localRequire: runtime.requireModule.bind(runtime),
     parentProcess: process,

packages/jest-circus/src/legacy-code-todo-rewrite/jestAdapterInit.ts

@@ -5,7 +5,6 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import type BabelTraverse from '@babel/traverse';
 import throat from 'throat';
 import type {JestEnvironment} from '@jest/environment';
 import {
@@ -46,8 +45,6 @@ interface JestGlobals extends Global.TestFrameworkGlobals {
 export const initialize = async ({
   config,
   environment,
-  getPrettier,
-  getBabelTraverse,
   globalConfig,
   localRequire,
   parentProcess,
@@ -57,8 +54,6 @@ export const initialize = async ({
 }: {
   config: Config.ProjectConfig;
   environment: JestEnvironment;
-  getPrettier: () => null | any;
-  getBabelTraverse: () => typeof BabelTraverse;
   globalConfig: Config.GlobalConfig;
   localRequire: <T = unknown>(path: Config.Path) => T;
   testPath: Config.Path;
@@ -162,8 +157,7 @@ export const initialize = async ({
   const snapshotPath = snapshotResolver.resolveSnapshotPath(testPath);
   const snapshotState = new SnapshotState(snapshotPath, {
     expand,
-    getBabelTraverse,
-    getPrettier,
+    prettierPath: config.prettierPath,
     updateSnapshot,
   });
   // @ts-expect-error: snapshotState is a jest extension of `expect`

packages/jest-jasmine2/src/setup_jest_globals.ts

@@ -106,13 +106,12 @@ export default ({
 
   patchJasmine();
   const {expand, updateSnapshot} = globalConfig;
+  const {prettierPath} = config;
   const snapshotResolver = buildSnapshotResolver(config);
   const snapshotPath = snapshotResolver.resolveSnapshotPath(testPath);
   const snapshotState = new SnapshotState(snapshotPath, {
     expand,
-    getBabelTraverse: () => require('@babel/traverse').default,
-    getPrettier: () =>
-      config.prettierPath ? require(config.prettierPath) : null,
+    prettierPath,
     updateSnapshot,
   });
   // @ts-expect-error: snapshotState is a jest extension of `expect`

packages/jest-snapshot/package.json

@@ -14,10 +14,15 @@
     "./package.json": "./package.json"
   },
   "dependencies": {
+    "@babel/generator": "^7.7.2",
+    "@babel/parser": "^7.7.2",
+    "@babel/plugin-syntax-typescript": "^7.7.2",
+    "@babel/traverse": "^7.7.2",
     "@babel/types": "^7.0.0",
     "@jest/types": "^26.6.2",
     "@types/babel__traverse": "^7.0.4",
-    "@types/prettier": "^2.0.0",
+    "@types/prettier": "^2.1.5",
+    "babel-preset-current-node-syntax": "^1.0.0",
     "chalk": "^4.0.0",
     "expect": "^26.6.2",
     "graceful-fs": "^4.2.4",
@@ -32,14 +37,25 @@
     "semver": "^7.3.2"
   },
   "devDependencies": {
+    "@babel/core": "^7.7.2",
+    "@babel/preset-flow": "^7.7.2",
+    "@babel/preset-react": "^7.7.2",
     "@babel/traverse": "^7.3.4",
     "@jest/test-utils": "^26.6.2",
     "@types/graceful-fs": "^4.1.3",
     "@types/natural-compare": "^1.4.0",
     "@types/semver": "^7.1.0",
     "ansi-regex": "^5.0.0",
     "ansi-styles": "^4.2.0",
-    "prettier": "^1.19.1"
+    "prettier": "^2.0.0"
+  },
+  "peerDependencies": {
+    "@babel/core": "^7.7.2"
+  },
+  "peerDependenciesMeta": {
+    "@babel/core": {
+      "optional": true
+    }
   },
   "engines": {
     "node": "^10.13.0 || ^12.13.0 || ^14.15.0 || >=15.0.0"