'use strict';

const { expect } = require('chai');
const GithubApiProvider = require('./github-api-provider');

describe('Github API provider', function() {
  const baseUrl = 'https://github-api.example.com';

  let provider;
  beforeEach(function() {
    provider = new GithubApiProvider({ baseUrl });
  });

  context('a valid response', function() {
    const rateLimit = 12500;
    const remaining = 7955;
    const nextReset = 123456789;
    const mockResponse = {
      statusCode: 200,
      headers: {
        'x-ratelimit-limit': rateLimit,
        'x-ratelimit-remaining': remaining,
        'x-ratelimit-reset': nextReset,
      },
    };
    const mockBuffer = Buffer.alloc(0);
    const mockRequest = (...args) => {
      const callback = args.pop();
      callback(null, mockResponse, mockBuffer);
    };

    it('should invoke the callback', function(done) {
      provider.request(mockRequest, '/foo', {}, (err, res, buffer) => {
        expect(err).to.equal(null);
        expect(Object.is(res, mockResponse)).to.be.true;
        expect(Object.is(buffer, mockBuffer)).to.be.true;
        done();
      });
    });
  });

  context('an unauthorized response', function() {
    const mockResponse = { statusCode: 401 };
    const mockBuffer = Buffer.alloc(0);
    const mockRequest = (...args) => {
      const callback = args.pop();
      callback(null, mockResponse, mockBuffer);
    };

    it('should invoke the callback', function(done) {
      provider.request(mockRequest, '/foo', {}, (err, res, buffer) => {
        expect(err).to.equal(null);
        // Add more?
        done();
      });
    });
  });

  context('a connection error', function() {
    const mockRequest = (...args) => {
      const callback = args.pop();
      callback(Error('connection timeout'));
    };

    it('should pass the error to the callback', function(done) {
      provider.request(mockRequest, '/foo', {}, (err, res, buffer) => {
        expect(err).to.be.an.instanceof(Error);
        expect(err.message).to.equal('connection timeout');
        done();
      });
    });
  });
});