jest how to merge two xx.spec.ts to be one? - jestjs

Question

in order to cover all statements/branch/lines, I need to write two or more fn.spec.ts to test fn.ts, how can I merge fn.spec.ts and fn2.spec.ts to be one file ?
// fn.ts
export const getEnv = () => {
if (location.href.indexOf('localhost') !== -1 || /\d+\.\d+\.\d+\.\d+/.test(location.href)) {
return 'Test'
}
return 'Product'
}
// fn.spec.ts
describe('fn getEnv',()=>{
Object.defineProperty(window, 'location', {
value: {
href: 'http://192.168.2.3:9001'
},
})
const { getEnv } = require('./fn')
test('getEnv',()=>{
expect(getEnv()).toBe('Test')
})
})
// fn2.spec.ts
describe('fn getEnv',()=>{
Object.defineProperty(window, 'location', {
value: {
href: 'https://xx.com'
},
})
const { getEnv } = require('./fn')
test('getEnv',()=>{
expect(getEnv()).toBe('Product')
})
})
// jest.config.js
module.exports = {
testEnvironment: 'jest-environment-jsdom', // browser environment
}

Answer 1

Just merge it into one file with a clear expectation message.
import { getEnv } from './fn';
describe('fn', () => {
describe('getEnv', () => {
test('should return "Test" when window location is an IP address', () => {
Object.defineProperty(window, 'location', {
value: {
href: 'http://192.168.2.3:9001'
},
});
const actual = getEnv();
expect(actual).toBe('Test');
});
test('should return "Product" when window location is a domain', () => {
Object.defineProperty(window, 'location', {
value: {
href: 'https://xx.com'
},
});
const actual = getEnv();
expect(actual).toBe('Product');
})
});
});