some baaaasic tests

Author: pvinis

jest.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  preset: 'ts-jest',
+  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
+  testPathIgnorePatterns: ['node_modules', 'lib'],
+}

package.json

@@ -5,10 +5,9 @@
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "scripts": {
-    "prepare": "yarn build",
-    "build": "yarn tsc",
+    "build": "tsc",
     "release": "auto shipit",
-    "test": "echo \"Error: no test specified\" && exit 1",
+    "test": "jest",
     "lint": "eslint src/**/*.ts"
   },
   "peerDependencies": {
@@ -19,13 +18,21 @@
     "@auto-it/all-contributors": "^9.10.7",
     "@auto-it/first-time-contributor": "^9.10.7",
     "@react-native-community/eslint-config": "^0.0.7",
+    "@testing-library/react-hooks": "^3.2.1",
+    "@testing-library/react-native": "^5.0.3",
+    "@types/jest": "^25.1.3",
     "@types/react": "^16.9.10",
     "@types/react-native": "^0.61.0",
     "all-contributors-cli": "^6.13.0",
     "auto": "^9.10.7",
     "eslint": "^6.8.0",
     "eslint-plugin-prettier": "^3.1.2",
+    "jest": "^25.1.0",
     "prettier": "^1.19.1",
+    "react": "^16.12.0",
+    "react-native": "^0.61.5",
+    "react-test-renderer": "^16.12.0",
+    "ts-jest": "^25.2.1",
     "typescript": "^3.6.4"
   },
   "author": "Nader Dabit",

src/useLayout.test.ts

@@ -0,0 +1,14 @@
+import {renderHook} from '@testing-library/react-hooks'
+
+import useLayout from './useLayout'
+
+describe('bla', () => {
+  it('should increment counter', () => {
+    const {result} = renderHook(() => useLayout())
+
+    expect(result.current.x).toBe(0)
+    expect(result.current.y).toBe(0)
+    expect(result.current.width).toBe(0)
+    expect(result.current.height).toBe(0)
+  })
+})