gitbeaker/packages/browser/test/unit/KyRequester.ts

import ky from 'ky';
import { Headers } from 'headers-utils';
import { processBody, handler, defaultOptionsHandler } from '../../src/KyRequester';

global.Headers = Headers;

jest.mock('ky');

const MockKy = ky as unknown as jest.Mock;

describe('processBody', () => {
  it('should return a json object if type is application/json', async () => {
    const output = await processBody({
      json() {
        return Promise.resolve({ test: 5 });
      },
      headers: {
        get() {
          return 'application/json';
        },
      },
    } as unknown as Response);

    expect(output).toMatchObject({ test: 5 });
  });

  it('should return a buffer if type is octet-stream, binary, or gzip', async () => {
    const output = [
      processBody({
        arrayBuffer() {
          return Promise.resolve(Buffer.alloc(0));
        },
        headers: {
          get() {
            return 'application/octet-stream';
          },
        },
      } as unknown as Response),
      processBody({
        arrayBuffer() {
          return Promise.resolve(Buffer.alloc(0));
        },
        headers: {
          get() {
            return 'binary/octet-stream';
          },
        },
      } as unknown as Response),
      processBody({
        arrayBuffer() {
          return Promise.resolve(Buffer.alloc(0));
        },
        headers: {
          get() {
            return 'image/png';
          },
        },
      } as unknown as Response),
      processBody({
        arrayBuffer() {
          return Promise.resolve(Buffer.alloc(0));
        },
        headers: {
          get() {
            return 'application/gzip';
          },
        },
      } as unknown as Response),
    ];

    const fulfilled = await Promise.all(output);

    fulfilled.forEach((o) => expect(o).toBeInstanceOf(Buffer));
  });

  it('should return a string if type is text/<subtype>', async () => {
    const output = await processBody({
      text() {
        return Promise.resolve('test');
      },
      headers: {
        get() {
          return 'text/plain';
        },
      },
    } as unknown as Response);

    expect(typeof output).toBe('string');
    expect(output).toEqual('test');
  });

  it('should return a empty string when presented with an unknown content-type and empty body', async () => {
    const output = await processBody({
      arrayBuffer() {
        return Promise.resolve(Buffer.alloc(0));
      },
      headers: {
        get() {
          return 'fake';
        },
      },
    } as unknown as Response);

    expect(output).toBeInstanceOf(Buffer);
    expect(output.length).toBe(0);
  });
});

describe('handler', () => {
  it('should return an error with a description when response has an error prop', async () => {
    MockKy.mockImplementationOnce(() => {
      const e = {
        response: {
          json() {
            return Promise.resolve({ error: 'msg' });
          },
        },
      };
      return Promise.reject(e);
    });

    await expect(handler('http://test.com', {})).rejects.toMatchObject({ description: 'msg' });
  });

  it('should return an error with a description when response has an message prop', async () => {
    MockKy.mockImplementationOnce(() => {
      const e = {
        response: {
          json() {
            return Promise.resolve({ message: 'msg' });
          },
        },
      };
      return Promise.reject(e);
    });

    await expect(handler('http://test.com', {})).rejects.toMatchObject({ description: 'msg' });
  });

  it('should return correct properties if request is valid', async () => {
    MockKy.mockImplementationOnce(() => ({
      status: 404,
      headers: {
        get() {
          return 'application/json';
        },
        entries() {
          return [['token', '1234']];
        },
      },
      json() {
        return Promise.resolve({});
      },
    }));

    const output = await handler('http://test.com', {});

    expect(output).toMatchObject({
      body: {},
      headers: {},
      status: 404,
    });
  });
});

describe('defaultRequest', () => {
  const service = {
    headers: { test: '5' },
    url: 'testurl',
    requestTimeout: 50,
    rejectUnauthorized: true,
  };

  it('should stringify body if it isnt of type FormData', () => {
    const testBody = { test: 6 };
    const { body, headers } = defaultOptionsHandler(service, {
      body: testBody,
    });

    expect(headers).toBeInstanceOf(Headers);
    expect(body).toBe(JSON.stringify(testBody));
  });
});