import { AcceptPreferenceParser } from '../../../../src/ldp/http/AcceptPreferenceParser';
import { HttpRequest } from '../../../../src/server/HttpRequest';

describe('An AcceptPreferenceParser', (): void => {
  const preferenceParser = new AcceptPreferenceParser();

  it('can handle all input.', async(): Promise<void> => {
    await expect(preferenceParser.canHandle()).resolves.toBeUndefined();
  });

  it('returns an empty result if there is no relevant input.', async(): Promise<void> => {
    await expect(preferenceParser.handle({ headers: {}} as HttpRequest)).resolves.toEqual({});
  });

  it('parses accept headers.', async(): Promise<void> => {
    await expect(preferenceParser.handle({ headers: { accept: 'audio/*; q=0.2, audio/basic' }} as HttpRequest))
      .resolves.toEqual({ type: [{ value: 'audio/basic', weight: 1 }, { value: 'audio/*', weight: 0.2 }]});
  });

  it('parses accept-charset headers.', async(): Promise<void> => {
    await expect(preferenceParser.handle({ headers: { 'accept-charset': 'iso-8859-5, unicode-1-1;q=0.8' }} as unknown as HttpRequest))
      .resolves.toEqual({ charset: [{ value: 'iso-8859-5', weight: 1 }, { value: 'unicode-1-1', weight: 0.8 }]});
  });

  it('parses accept-datetime headers.', async(): Promise<void> => {
    await expect(preferenceParser.handle({ headers: { 'accept-datetime': 'Tue, 20 Mar 2001 20:35:00 GMT' }} as unknown as HttpRequest))
      .resolves.toEqual({ datetime: [{ value: 'Tue, 20 Mar 2001 20:35:00 GMT', weight: 1 }]});
  });

  it('parses accept-encoding headers.', async(): Promise<void> => {
    await expect(preferenceParser.handle({ headers: { 'accept-encoding': 'gzip;q=1.0, identity; q=0.5, *;q=0' }} as unknown as HttpRequest))
      .resolves.toEqual({ encoding: [{ value: 'gzip', weight: 1 }, { value: 'identity', weight: 0.5 }, { value: '*', weight: 0 }]});
  });

  it('parses accept-language headers.', async(): Promise<void> => {
    await expect(preferenceParser.handle({ headers: { 'accept-language': 'da, en-gb;q=0.8, en;q=0.7' }} as HttpRequest))
      .resolves.toEqual({ language: [{ value: 'da', weight: 1 }, { value: 'en-gb', weight: 0.8 }, { value: 'en', weight: 0.7 }]});
  });
});