feat: peer deps check

package.json

@@ -77,6 +77,7 @@
     "@release-it/conventional-changelog": "^10.0.0",
     "@relmify/jest-serializer-strip-ansi": "^1.0.2",
     "@types/jest": "^29.5.14",
+    "@types/node": "^22.13.8",
     "@types/react": "^19.0.0",
     "@types/react-test-renderer": "^19.0.0",
     "babel-jest": "^29.7.0",
@@ -87,9 +88,9 @@
     "flow-bin": "~0.170.0",
     "jest": "^29.7.0",
     "prettier": "^2.8.8",
-    "react": "^19.0.0",
+    "react": "19.0.0",
     "react-native": "0.78.0",
-    "react-test-renderer": "^19.0.0",
+    "react-test-renderer": "19.0.0",
     "release-it": "^18.0.0",
     "typescript": "^5.6.3",
     "typescript-eslint": "^8.19.1"

src/helpers/__tests__/ensure-peer-deps.test.ts

@@ -0,0 +1,50 @@
+/* eslint-disable @typescript-eslint/no-require-imports */
+
+// Mock the require calls
+jest.mock('react/package.json', () => ({ version: '19.0.0' }));
+jest.mock('react-test-renderer/package.json', () => ({ version: '19.0.0' }));
+
+describe('ensurePeerDeps', () => {
+  const originalEnv = process.env;
+
+  beforeEach(() => {
+    jest.resetModules();
+    process.env = { ...originalEnv };
+    delete process.env.RNTL_SKIP_DEPS_CHECK;
+  });
+
+  afterEach(() => {
+    process.env = originalEnv;
+  });
+
+  it('should not throw when versions match', () => {
+    expect(() => require('../ensure-peer-deps')).not.toThrow();
+  });
+
+  it('should throw when react-test-renderer is missing', () => {
+    jest.mock('react-test-renderer/package.json', () => {
+      throw new Error('Module not found');
+    });
+
+    expect(() => require('../ensure-peer-deps')).toThrow(
+      'Missing dev dependency "react-test-renderer@19.0.0"',
+    );
+  });
+
+  it('should throw when react-test-renderer version mismatches', () => {
+    jest.mock('react-test-renderer/package.json', () => ({ version: '18.2.0' }));
+
+    expect(() => require('../ensure-peer-deps')).toThrow(
+      'Incorrect version of "react-test-renderer" detected. Expected "19.0.0", but found "18.2.0"',
+    );
+  });
+
+  it('should skip dependency check when RNTL_SKIP_DEPS_CHECK is set', () => {
+    process.env.RNTL_SKIP_DEPS_CHECK = '1';
+    jest.mock('react-test-renderer/package.json', () => {
+      throw new Error('Module not found');
+    });
+
+    expect(() => require('../ensure-peer-deps')).not.toThrow();
+  });
+});

src/helpers/ensure-peer-deps.ts

@@ -0,0 +1,37 @@
+function ensurePeerDeps() {
+  const reactVersion = getPackageVersion('react');
+  ensurePackage('react-test-renderer', reactVersion);
+}
+
+function ensurePackage(name: string, expectedVersion: string) {
+  const actualVersion = getPackageVersion(name);
+  if (!actualVersion) {
+    const error = new Error(
+      `Missing dev dependency "${name}@${expectedVersion}".\n\nFix it by running:\nnpm install -D ${name}@${expectedVersion}`,
+    );
+    Error.captureStackTrace(error, ensurePeerDeps);
+    throw error;
+  }
+
+  if (expectedVersion !== actualVersion) {
+    const error = new Error(
+      `Incorrect version of "${name}" detected. Expected "${expectedVersion}", but found "${actualVersion}".\n\nFix it by running:\nnpm install -D ${name}@${expectedVersion}`,
+    );
+    Error.captureStackTrace(error, ensurePeerDeps);
+    throw error;
+  }
+}
+
+function getPackageVersion(name: string) {
+  try {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    const packageJson = require(`${name}/package.json`);
+    return packageJson.version;
+  } catch {
+    return null;
+  }
+}
+
+if (!process.env.RNTL_SKIP_DEPS_CHECK) {
+  ensurePeerDeps();
+}

src/index.ts

@@ -1,3 +1,4 @@
+import './helpers/ensure-peer-deps';
 import './matchers/extend-expect';
 
 import { getIsReactActEnvironment, setReactActEnvironment } from './act';

yarn.lock

@@ -2838,6 +2838,7 @@ __metadata:
     "@release-it/conventional-changelog": "npm:^10.0.0"
     "@relmify/jest-serializer-strip-ansi": "npm:^1.0.2"
     "@types/jest": "npm:^29.5.14"
+    "@types/node": "npm:^22.13.8"
     "@types/react": "npm:^19.0.0"
     "@types/react-test-renderer": "npm:^19.0.0"
     babel-jest: "npm:^29.7.0"
@@ -2851,10 +2852,10 @@ __metadata:
     jest-matcher-utils: "npm:^29.7.0"
     prettier: "npm:^2.8.8"
     pretty-format: "npm:^29.7.0"
-    react: "npm:^19.0.0"
+    react: "npm:19.0.0"
     react-native: "npm:0.78.0"
     react-native-gesture-handler: "npm:^2.23.1"
-    react-test-renderer: "npm:^19.0.0"
+    react-test-renderer: "npm:19.0.0"
     redent: "npm:^3.0.0"
     release-it: "npm:^18.0.0"
     typescript: "npm:^5.6.3"
@@ -3008,6 +3009,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/node@npm:^22.13.8":
+  version: 22.13.8
+  resolution: "@types/node@npm:22.13.8"
+  dependencies:
+    undici-types: "npm:~6.20.0"
+  checksum: 10c0/bfc92b734a9dce6ac5daee0a52feccdf5dcb3804d895e4bc5384e2f4644612b8801725cd03c8c3c0888fb5eeb16b875877ac44b77641e0196dc1a837b1c2a366
+  languageName: node
+  linkType: hard
+
 "@types/normalize-package-data@npm:^2.4.3":
   version: 2.4.4
   resolution: "@types/normalize-package-data@npm:2.4.4"
@@ -3031,7 +3041,16 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/react@npm:*, @types/react@npm:^19.0.0":
+"@types/react@npm:*":
+  version: 19.0.10
+  resolution: "@types/react@npm:19.0.10"
+  dependencies:
+    csstype: "npm:^3.0.2"
+  checksum: 10c0/41884cca21850c8b2d6578b172ca0ca4fff6021251a68532b19f2031ac23dc5a9222470208065f8d9985d367376047df2f49ece8d927f7d04cdc94922b1eb34b
+  languageName: node
+  linkType: hard
+
+"@types/react@npm:^19.0.0":
   version: 19.0.8
   resolution: "@types/react@npm:19.0.8"
   dependencies:
@@ -9261,7 +9280,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"react-test-renderer@npm:^19.0.0":
+"react-test-renderer@npm:19.0.0":
   version: 19.0.0
   resolution: "react-test-renderer@npm:19.0.0"
   dependencies:
@@ -9273,7 +9292,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"react@npm:^19.0.0":
+"react@npm:19.0.0":
   version: 19.0.0
   resolution: "react@npm:19.0.0"
   checksum: 10c0/9cad8f103e8e3a16d15cb18a0d8115d8bd9f9e1ce3420310aea381eb42aa0a4f812cf047bb5441349257a05fba8a291515691e3cb51267279b2d2c3253f38471