@redocly/openapi-core/src/config/__tests__/load.test.ts

See https://github.com/Redocly/openapi-cli

import { loadConfig, findConfig } from '../load';
import { RedoclyClient } from '../../redocly';

const fs = require('fs');
const path = require('path');

describe('loadConfig', () => {
  it('should resolve config http header by US region', async () => {
    jest
      .spyOn(RedoclyClient.prototype, 'getTokens')
      .mockImplementation(() =>
        Promise.resolve([{ region: 'us', token: 'accessToken', valid: true }]),
      );
    const config = await loadConfig();
    expect(config.resolve.http.headers).toStrictEqual([
      {
        matches: 'https://api.redocly.com/registry/**',
        name: 'Authorization',
        envVariable: undefined,
        value: 'accessToken',
      },
      {
        matches: 'https://api.redoc.ly/registry/**',
        name: 'Authorization',
        envVariable: undefined,
        value: 'accessToken',
      },
    ]);
  });

  it('should resolve config http header by EU region', async () => {
    jest
      .spyOn(RedoclyClient.prototype, 'getTokens')
      .mockImplementation(() =>
        Promise.resolve([{ region: 'eu', token: 'accessToken', valid: true }]),
      );
    const config = await loadConfig();
    expect(config.resolve.http.headers).toStrictEqual([
      {
        matches: 'https://api.eu.redocly.com/registry/**',
        name: 'Authorization',
        envVariable: undefined,
        value: 'accessToken',
      },
    ]);
  });
});

describe('findConfig', () => {
  it('should find redocly.yaml', async () => {
    jest.spyOn(fs, 'existsSync').mockImplementation((name) => name === 'redocly.yaml');
    const configName = findConfig();
    expect(configName).toStrictEqual('redocly.yaml');
  });
  it('should find .redocly.yaml', async () => {
    jest.spyOn(fs, 'existsSync').mockImplementation((name) => name === '.redocly.yaml');
    const configName = findConfig();
    expect(configName).toStrictEqual('.redocly.yaml');
  });
  it('should throw an error when found multiple config files', async () => {
    jest
      .spyOn(fs, 'existsSync')
      .mockImplementation((name) => name === 'redocly.yaml' || name === '.redocly.yaml');
    expect(findConfig).toThrow(`
      Multiple configuration files are not allowed. 
      Found the following files: redocly.yaml, .redocly.yaml. 
      Please use 'redocly.yaml' instead.
    `);
  });
  it('should find a nested config ', async () => {
    jest.spyOn(fs, 'existsSync').mockImplementation((name) => name === 'dir/redocly.yaml');
    jest.spyOn(path, 'resolve').mockImplementationOnce((dir, name) => `${dir}/${name}`);
    const configName = findConfig('dir');
    expect(configName).toStrictEqual('dir/redocly.yaml');
  });
});