@nestjsplus/lib-starter/schematics/gen-env/gen-env.factory.spec.ts

Boilerplate for building installable NestJS libraries

import { Tree } from '@angular-devkit/schematics';
import { SchematicTestRunner } from '@angular-devkit/schematics/testing';
import * as path from 'path';

const collectionPath = path.join(__dirname, '../collection.json');

describe('gen-env schematic', () => {
  it('creates env file in specified folder', () => {
    const runner = new SchematicTestRunner('schematics', collectionPath);
    const options = {
      testMessage: 'foo',
      envDir: 'bar',
    };
    const tree = runner.runSchematic('gen-env', options, Tree.empty());

    expect(tree.files).toEqual(['/bar/development.env']);
    expect(tree.readContent('/bar/development.env')).toContain(
      options.testMessage,
    );
  });
});