import {
  VirtualTree,
  SchematicContext,
  MergeStrategy,
  Tree
} from '@angular-devkit/schematics';
import { updateTravis } from './update.travis';
import { Schema } from './schema';
import { isObservable, of } from 'rxjs';
import { tap } from 'rxjs/operators';
import { getFileContent } from '../test';
import { safeDump, safeLoad } from 'js-yaml';

describe('update.travis', () => {
  const context: SchematicContext = ({
    engine: null,
    debug: false,
    strategy: MergeStrategy.Default
  } as {}) as SchematicContext;

  it('should update an existing travis file', () => {
    const tree = new VirtualTree();

    const options: Schema = {
      url: 'http:/example.org'
    };

    const OLD_TRAVIS_TEMPLATE = {
      node_js: ['8'],
      language: 'node_js',
      script: ['npm run deploy']
    };

    tree.create('.travis.yml', safeDump(OLD_TRAVIS_TEMPLATE));

    const res = updateTravis(options)(tree, context);
    const rxRes = isObservable(res) ? res : of(res as Tree);

    return rxRes
      .pipe(
        tap(tree => {
          // verify the url
          expect(tree).toBeTruthy();
          if (tree) {
            // check that we have the file
            expect(tree.exists('/.travis.yml')).toBeTruthy();
            // parse
            const travis = safeLoad(
              getFileContent(tree, '/.travis.yml')
            ) as any;

            expect(travis.branches).toBeTruthy();
          }
        })
      )
      .toPromise();
  });

  it('should create a new travis file', () => {
    const tree = new VirtualTree();

    const options: Schema = {
      url: 'http:/example.org'
    };

    const res = updateTravis(options)(tree, context);

    const rxRes = isObservable(res) ? res : of(res as Tree);

    return rxRes
      .pipe(
        tap(tree => {
          // verify the url
          expect(tree).toBeTruthy();
          if (tree) {
            // check that we have the file
            expect(tree.exists('/.travis.yml')).toBeTruthy();
          }
        })
      )
      .toPromise();
  });
});