Cannot get Jest & React Native working - react-native

Question

Trying to get Jest v12.1.1 working with React Native v0.26.2 I'm getting this error when run npm test:
Error: Cannot find module 'ErrorUtils' from 'env.js'
Here's my package.json. I'm trying to get this working with the default react-native init AwesomeProject starter.
Is there something missing from my package.json? (are here any lines I don't need?)
EXAMPLE 1:
package.json
{
"name": "AwesomeProject",
"version": "0.0.1",
"private": true,
"scripts": {
"start": "node node_modules/react-native/local-cli/cli.js start"
},
"dependencies": {
"react": "^15.0.2",
"react-native": "^0.26.2"
},
"devDependencies": {
"babel-jest": "^9.0.0",
"babel-preset-es2015": "*",
"babel-preset-react": "*",
"jest-cli": "^12.1.1"
},
"scripts": {
"test": "jest"
},
"jest": {
"scriptPreprocessor": "node_modules/react-native/jestSupport/preprocessor.js",
"setupEnvScriptFile": "node_modules/react-native/jestSupport/env.js",
"testPathIgnorePatterns": [
"/node_modules/",
"/android/",
"/ios/",
"/.idea/"
],
"testFileExtensions": [
"js"
],
"unmockedModulePathPatterns": [
"<rootDir>/node_modules/react/",
"<rootDir>/node_modules/react-dom/",
"<rootDir>/node_modules/react-addons-test-utils/"
],
"verbose": true
}
}
Here's a test script.
index.android-test.js
// __tests__/index.android-test.js
'use strict';
jest
.disableAutomock()
.setMock('AwesomeProject', {})
.setMock('React', {Component: class {}});
describe('AwesomeProject', () => {
it('test something', () => {
const testJunk = true;
expect(testJunk).toEqual(true);
});
});
EXAMPLE 2:
I get a different error when I add "haste" to package.json and remove scriptPreprocessor & setupEnvScriptFile.
Error: Cannot find module 'AwesomeProject' from 'index.android-test.js'
I have no clue why I get farther ahead with the following. My previous Example 1 is following:
https://facebook.github.io/jest/docs/tutorial-react.html#content
And Example 2 with 'haste` is following:
https://github.com/fbsamples/f8app/blob/master/package.json
Really confused about why Ex 1 doesn't work.
revised package.json
{
"name": "AwesomeProject",
"version": "0.0.1",
"private": true,
"scripts": {
"start": "node node_modules/react-native/local-cli/cli.js start"
},
"dependencies": {
"react": "^15.0.2",
"react-native": "^0.26.2"
},
"devDependencies": {
"babel-jest": "^9.0.0",
"babel-preset-es2015": "*",
"babel-preset-react": "*",
"jest-cli": "^12.1.1"
},
"scripts": {
"test": "jest"
},
"jest": {
"haste": {
"defaultPlatform": "android",
"platforms": [
"ios",
"android"
],
"providesModuleNodeModules": [
"react-native"
]
},
"testPathIgnorePatterns": [
"/node_modules/",
"/android/",
"/ios/",
"/.idea/"
],
"testFileExtensions": [
"js"
],
"unmockedModulePathPatterns": [
"<rootDir>/node_modules/react/",
"<rootDir>/node_modules/react-dom/",
"<rootDir>/node_modules/react-addons-test-utils/"
],
"verbose": true
}
}