scandit-sdk/src/lib/cameraAccess.spec.ts

Scandit Barcode Scanner SDK for the Web

/* tslint:disable:no-implicit-dependencies no-any */
/**
 * CameraAccess tests
 */
import test from "ava";
import * as sinon from "sinon";

import { BrowserHelper, Camera, CameraAccess } from "..";

const getUserMediaStub: sinon.SinonStub = sinon.stub();
const getVideoTracksStub: sinon.SinonStub = sinon.stub();
const applyConstraintsStub: sinon.SinonStub = sinon.stub();
const getCapabilitiesStub: sinon.SinonStub = sinon.stub();
const getConstraintsStub: sinon.SinonStub = sinon.stub();
const getSettingsStub: sinon.SinonStub = sinon.stub();
const stopStub: sinon.SinonStub = sinon.stub();
const getSourcesStub: sinon.SinonStub = sinon.stub();
const enumerateDevicesStub: sinon.SinonStub = sinon.stub();

const stubs: sinon.SinonStub[] = [
  getUserMediaStub,
  getVideoTracksStub,
  applyConstraintsStub,
  getCapabilitiesStub,
  getConstraintsStub,
  getSettingsStub,
  stopStub,
  getSourcesStub,
  enumerateDevicesStub
];

const emptyCamera: MediaDeviceInfo = {
  deviceId: "1",
  groupId: "1",
  kind: "videoinput",
  label: "",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const fakeCamera1: MediaDeviceInfo = {
  deviceId: "1",
  groupId: "1",
  kind: "videoinput",
  label: "Fake Camera Device (back)",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const fakeCamera2: MediaDeviceInfo = {
  deviceId: "2",
  groupId: "1",
  kind: "videoinput",
  label: "Fake Camera Device (front)",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const fakeCamera3: MediaDeviceInfo = {
  deviceId: "3",
  groupId: "1",
  kind: "videoinput",
  label: "Fake Camera Device (posteriore)",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const fakeCamera4: MediaDeviceInfo = {
  deviceId: "4",
  groupId: "1",
  kind: "videoinput",
  label: "Fake Camera Device (unknown)",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const fakeCamera5: MediaDeviceInfo = {
  deviceId: "5",
  groupId: "1",
  kind: "videoinput",
  label: "Fake Camera Device (unknown)",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const fakeCamera6: MediaDeviceInfo = {
  deviceId: "6",
  groupId: "1",
  kind: "videoinput",
  label: "Fake Camera Device 5MP",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const fakeCamera7: MediaDeviceInfo = {
  deviceId: "7",
  groupId: "1",
  kind: "videoinput",
  label: "Fake Camera Device 2MP",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const fakeCamera8: MediaDeviceInfo = {
  deviceId: "8",
  groupId: "1",
  kind: "videoinput",
  label: "camera2 8, facing back",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const fakeCamera9: MediaDeviceInfo = {
  deviceId: "9",
  groupId: "1",
  kind: "videoinput",
  label: "camera2 9, facing back",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

const illegalFakeCamera1: MediaDeviceInfo = <MediaDeviceInfo>(<unknown>{
  deviceId: "10",
  groupId: "1",
  kind: "videoinput"
});

const legacyFakeCamera1: MediaDeviceInfo = <MediaDeviceInfo>(<unknown>{
  groupId: "1",
  kind: "videoinput",
  label: "Fake Camera Device (back)"
});

const legacyFakeCamera2: MediaDeviceInfo = <MediaDeviceInfo>(<unknown>{
  deviceId: "100",
  groupId: "1",
  kind: "video",
  label: "Fake Camera Device (front)"
});

const fakeMicrophone: MediaDeviceInfo = {
  deviceId: "1000",
  groupId: "1",
  kind: "audioinput",
  label: "Fake Microhpone Device #2",
  toJSON(): MediaDeviceInfo {
    return this;
  }
};

function fakeCompatibleBrowser(): void {
  Object.defineProperty(navigator, "mediaDevices", {
    value: {
      getUserMedia: getUserMediaStub.resolves({
        getTracks: getVideoTracksStub,
        getVideoTracks: getVideoTracksStub
      })
    },
    configurable: true
  });
  getVideoTracksStub.returns([
    {
      applyConstraints: applyConstraintsStub.resolves(),
      getCapabilities: getCapabilitiesStub.returns(123),
      getConstraints: getConstraintsStub.returns(456),
      getSettings: getSettingsStub.returns(789),
      stop: stopStub
    }
  ]);

  window.Blob = <Window["Blob"]>(<unknown>(() => {
    return;
  }));
  window.URL = <Window["URL"]>(<unknown>{
    createObjectURL: () => {
      return;
    }
  });
  window.Worker = () => {
    return;
  };
  window.WebAssembly = {};
}

function resetStubs(): void {
  stubs.forEach(mock => {
    mock.resetHistory();
  });
}

function getFakeMediaStreamTrack(deviceId: string, facingMode: string, label: string): MediaStreamTrack {
  return <MediaStreamTrack>(<unknown>{
    getSettings(): object {
      return {
        deviceId,
        facingMode
      };
    },
    label
  });
}

function deepObjectArrayCopy<T>(objectArray: T[]): T[] {
  return objectArray.map(object => {
    return { ...object };
  });
}

test.beforeEach(() => {
  window.MediaStreamTrack = undefined;
  navigator.enumerateDevices = undefined;
});

test.serial("getCameras (errors)", async t => {
  resetStubs();
  let error: Error = await t.throwsAsync(CameraAccess.getCameras());
  t.is(error.name, "UnsupportedBrowserError");
  t.false(getUserMediaStub.called);
  t.false(getSourcesStub.called);
  fakeCompatibleBrowser();
  navigator.mediaDevices.enumerateDevices = enumerateDevicesStub
    .onFirstCall()
    .resolves([])
    .onSecondCall()
    .rejects(new Error("Test error 1"));
  resetStubs();
  error = await t.throwsAsync(CameraAccess.getCameras());
  t.is(error.message, "Test error 1");
  t.true(getUserMediaStub.called);
  t.false(getSourcesStub.called);
  enumerateDevicesStub.reset();
  navigator.mediaDevices.enumerateDevices = enumerateDevicesStub.resolves([]);
  navigator.mediaDevices.getUserMedia = getUserMediaStub.rejects(new Error("Test error 2"));
  resetStubs();
  error = await t.throwsAsync(CameraAccess.getCameras());
  t.is(error.message, "Test error 2");
  t.true(getUserMediaStub.called);
  t.false(getSourcesStub.called);
});

test.serial("getCameras (MediaStreamTrack.getSources)", async t => {
  fakeCompatibleBrowser();
  // Intentionally no legacy method
  window.MediaStreamTrack = {};
  resetStubs();
  let error: Error = await t.throwsAsync(CameraAccess.getCameras());
  t.is(error.name, "UnsupportedBrowserError");
  t.false(getUserMediaStub.called);
  // Intentionally wrong legacy method
  window.MediaStreamTrack = {
    getSources: getSourcesStub.callsArgWith(0, null)
  };
  resetStubs();
  error = await t.throwsAsync(CameraAccess.getCameras());
  t.is(error.name, "UnsupportedBrowserError");
  t.false(getUserMediaStub.called);
  t.true(getSourcesStub.called);
  window.MediaStreamTrack = {
    getSources: getSourcesStub.callsArgWith(0, [emptyCamera])
  };
  resetStubs();
  let cameras: Camera[] = await CameraAccess.getCameras();
  t.true(getUserMediaStub.called);
  t.true(getSourcesStub.called);
  t.not(cameras, null);
  t.is(cameras.length, 1);
  window.MediaStreamTrack = {
    getSources: getSourcesStub.callsArgWith(0, [
      fakeCamera1,
      fakeCamera2,
      legacyFakeCamera1,
      legacyFakeCamera2,
      fakeMicrophone
    ])
  };
  resetStubs();
  cameras = await CameraAccess.getCameras();
  t.false(getUserMediaStub.called);
  t.true(getSourcesStub.called);
  t.not(cameras, null);
  t.is(cameras.length, 4);
  resetStubs();
  const newCameras: Camera[] = await CameraAccess.getCameras();
  t.false(getUserMediaStub.called);
  t.true(getSourcesStub.called);
  t.deepEqual(cameras, newCameras);
  t.is(cameras[0].deviceId, fakeCamera1.deviceId);
  t.is(cameras[0].label, fakeCamera1.label);
  t.is(cameras[0].cameraType, Camera.Type.BACK);
  t.is(cameras[0].currentResolution, undefined);
  t.is(cameras[1].deviceId, fakeCamera2.deviceId);
  t.is(cameras[1].label, fakeCamera2.label);
  t.is(cameras[1].cameraType, Camera.Type.FRONT);
  t.is(cameras[1].currentResolution, undefined);
  t.is(cameras[2].deviceId, "");
  t.is(cameras[2].label, legacyFakeCamera1.label);
  t.is(cameras[2].cameraType, Camera.Type.BACK);
  t.is(cameras[2].currentResolution, undefined);
  t.is(cameras[3].deviceId, legacyFakeCamera2.deviceId);
  t.is(cameras[3].label, legacyFakeCamera2.label);
  t.is(cameras[3].cameraType, Camera.Type.FRONT);
  t.is(cameras[3].currentResolution, undefined);
});

test.serial("getCameras (navigator.enumerateDevices & navigator.mediaDevices.enumerateDevices)", async t => {
  fakeCompatibleBrowser();
  window.MediaStreamTrack = {
    getSources: getSourcesStub
  };
  for (const baseObject of [navigator, navigator.mediaDevices]) {
    baseObject.enumerateDevices = enumerateDevicesStub.resolves([emptyCamera]);
    resetStubs();
    let cameras: Camera[] = await CameraAccess.getCameras();
    t.true(getUserMediaStub.called);
    t.true(enumerateDevicesStub.called);
    t.false(getSourcesStub.called);
    t.not(cameras, null);
    t.is(cameras.length, 1);
    baseObject.enumerateDevices = enumerateDevicesStub.resolves([
      fakeCamera1,
      fakeCamera2,
      illegalFakeCamera1,
      fakeMicrophone
    ]);
    resetStubs();
    cameras = await CameraAccess.getCameras();
    t.false(getUserMediaStub.called);
    t.true(enumerateDevicesStub.called);
    t.false(getSourcesStub.called);
    t.not(cameras, null);
    t.is(cameras.length, 3);
    resetStubs();
    const newCameras: Camera[] = await CameraAccess.getCameras();
    t.false(getUserMediaStub.called);
    t.true(enumerateDevicesStub.called);
    t.false(getSourcesStub.called);
    t.deepEqual(cameras, newCameras);
    t.is(cameras[0].deviceId, fakeCamera1.deviceId);
    t.is(cameras[0].label, fakeCamera1.label);
    t.is(cameras[0].cameraType, Camera.Type.BACK);
    t.is(cameras[0].currentResolution, undefined);
    t.is(cameras[1].deviceId, fakeCamera2.deviceId);
    t.is(cameras[1].label, fakeCamera2.label);
    t.is(cameras[1].cameraType, Camera.Type.FRONT);
    t.is(cameras[1].currentResolution, undefined);
    t.is(cameras[2].deviceId, illegalFakeCamera1.deviceId);
    t.is(cameras[2].label, "");
    t.is(cameras[2].cameraType, Camera.Type.FRONT);
    t.is(cameras[2].currentResolution, undefined);
  }
});

test.serial("getCameras (internationalized label)", async t => {
  fakeCompatibleBrowser();
  navigator.mediaDevices.enumerateDevices = enumerateDevicesStub.resolves([fakeCamera3]);
  resetStubs();
  const cameras: Camera[] = await CameraAccess.getCameras();
  t.not(cameras, null);
  t.is(cameras.length, 1);
  t.is(cameras[0].deviceId, fakeCamera3.deviceId);
  t.is(cameras[0].label, fakeCamera3.label);
  t.is(cameras[0].cameraType, Camera.Type.BACK);
  t.is(cameras[0].currentResolution, undefined);
});

test.serial("getCameras (no front/back label information)", async t => {
  fakeCompatibleBrowser();
  navigator.mediaDevices.enumerateDevices = enumerateDevicesStub.resolves([fakeCamera4, fakeCamera5]);
  resetStubs();
  const cameras: Camera[] = await CameraAccess.getCameras();
  t.not(cameras, null);
  t.is(cameras.length, 2);
  t.is(cameras[0].deviceId, fakeCamera4.deviceId);
  t.is(cameras[0].label, fakeCamera4.label);
  t.is(cameras[0].cameraType, Camera.Type.FRONT);
  t.is(cameras[0].currentResolution, undefined);
  t.is(cameras[1].deviceId, fakeCamera5.deviceId);
  t.is(cameras[1].label, fakeCamera5.label);
  t.is(cameras[1].cameraType, Camera.Type.BACK);
  t.is(cameras[1].currentResolution, undefined);
});

test.serial("getCameras (resolution label information)", async t => {
  fakeCompatibleBrowser();
  navigator.mediaDevices.enumerateDevices = enumerateDevicesStub.resolves([fakeCamera6, fakeCamera7]);
  resetStubs();
  const cameras: Camera[] = await CameraAccess.getCameras();
  t.not(cameras, null);
  t.is(cameras.length, 2);
  t.is(cameras[0].deviceId, fakeCamera6.deviceId);
  t.is(cameras[0].label, fakeCamera6.label);
  t.is(cameras[0].cameraType, Camera.Type.BACK);
  t.is(cameras[0].currentResolution, undefined);
  t.is(cameras[1].deviceId, fakeCamera7.deviceId);
  t.is(cameras[1].label, fakeCamera7.label);
  t.is(cameras[1].cameraType, Camera.Type.FRONT);
  t.is(cameras[1].currentResolution, undefined);
});

test.serial("getCameras (quickly consecutively)", async t => {
  fakeCompatibleBrowser();
  navigator.mediaDevices.enumerateDevices = enumerateDevicesStub.resolves([fakeCamera1, fakeCamera2]);
  resetStubs();
  await CameraAccess.getCameras();
  t.is(enumerateDevicesStub.callCount, 2);
  resetStubs();
  // tslint:disable-next-line: no-floating-promises
  CameraAccess.getCameras();
  const cameras: Camera[] = await CameraAccess.getCameras();
  t.is(enumerateDevicesStub.callCount, 2);
  t.not(cameras, null);
  t.is(cameras.length, 2);
  t.is(cameras[0].deviceId, fakeCamera1.deviceId);
  t.is(cameras[0].label, fakeCamera1.label);
  t.is(cameras[0].cameraType, Camera.Type.BACK);
  t.is(cameras[0].currentResolution, undefined);
  t.is(cameras[1].deviceId, fakeCamera2.deviceId);
  t.is(cameras[1].label, fakeCamera2.label);
  t.is(cameras[1].cameraType, Camera.Type.FRONT);
  t.is(cameras[1].currentResolution, undefined);
});

test.serial("adjustCamerasFromMainCameraStream", async t => {
  fakeCompatibleBrowser();
  navigator.mediaDevices.enumerateDevices = enumerateDevicesStub.resolves([fakeCamera1, fakeCamera2]);
  const originalCameras: Camera[] = await CameraAccess.getCameras();
  let cams: Camera[] = deepObjectArrayCopy(originalCameras);
  t.is(CameraAccess.adjustCamerasFromMainCameraStream(<MediaStreamTrack>(<unknown>{}), cams), undefined);
  t.is(cams[0].cameraType, Camera.Type.BACK);
  t.is(cams[1].cameraType, Camera.Type.FRONT);
  cams = deepObjectArrayCopy(originalCameras);
  t.is(CameraAccess.adjustCamerasFromMainCameraStream(getFakeMediaStreamTrack("1", "environment", ""), cams), cams[0]);
  t.is(cams[0].cameraType, Camera.Type.BACK);
  t.is(cams[1].cameraType, Camera.Type.FRONT);
  cams = deepObjectArrayCopy(originalCameras);
  t.is(
    CameraAccess.adjustCamerasFromMainCameraStream(getFakeMediaStreamTrack("2", "environment", ""), cams),
    undefined
  );
  t.is(cams[0].cameraType, Camera.Type.BACK);
  t.is(cams[1].cameraType, Camera.Type.BACK);
  cams = deepObjectArrayCopy(originalCameras);
  t.is(CameraAccess.adjustCamerasFromMainCameraStream(getFakeMediaStreamTrack("2", "user", ""), cams), undefined);
  t.is(cams[0].cameraType, Camera.Type.BACK);
  t.is(cams[1].cameraType, Camera.Type.FRONT);
});

test.serial("adjustCamerasFromMainCameraStream (unknown cameras)", async t => {
  fakeCompatibleBrowser();
  navigator.mediaDevices.enumerateDevices = enumerateDevicesStub.resolves([fakeCamera4, fakeCamera5]);
  const originalCameras: Camera[] = await CameraAccess.getCameras();
  let cams: Camera[] = deepObjectArrayCopy(originalCameras);
  t.is(CameraAccess.adjustCamerasFromMainCameraStream(<MediaStreamTrack>(<unknown>{}), cams), undefined);
  t.is(cams[0].cameraType, Camera.Type.FRONT);
  t.is(cams[1].cameraType, Camera.Type.BACK);
  cams = deepObjectArrayCopy(originalCameras);
  t.is(CameraAccess.adjustCamerasFromMainCameraStream(getFakeMediaStreamTrack("4", "environment", ""), cams), cams[0]);
  t.is(cams[0].cameraType, Camera.Type.BACK);
  t.is(cams[1].cameraType, Camera.Type.FRONT);
  cams = deepObjectArrayCopy(originalCameras);
  t.is(CameraAccess.adjustCamerasFromMainCameraStream(getFakeMediaStreamTrack("5", "environment", ""), cams), cams[1]);
  t.is(cams[0].cameraType, Camera.Type.FRONT);
  t.is(cams[1].cameraType, Camera.Type.BACK);
  cams = deepObjectArrayCopy(originalCameras);
  t.is(CameraAccess.adjustCamerasFromMainCameraStream(getFakeMediaStreamTrack("5", "user", ""), cams), undefined);
  t.is(cams[0].cameraType, Camera.Type.FRONT);
  t.is(cams[1].cameraType, Camera.Type.BACK);
});

test.serial("adjustCamerasFromMainCameraStream (triple camera setup)", async t => {
  // Back cameras with the lowest ID in label are the main one
  fakeCompatibleBrowser();
  navigator.mediaDevices.enumerateDevices = enumerateDevicesStub.resolves([fakeCamera2, fakeCamera9, fakeCamera8]);
  const originalCameras: Camera[] = await CameraAccess.getCameras();
  let cams: Camera[] = deepObjectArrayCopy(originalCameras);
  t.is(CameraAccess.adjustCamerasFromMainCameraStream(getFakeMediaStreamTrack("8", "environment", ""), cams), cams[2]);
  t.is(cams[0].cameraType, Camera.Type.FRONT);
  t.is(cams[1].cameraType, Camera.Type.BACK);
  t.is(cams[2].cameraType, Camera.Type.BACK);
  cams = deepObjectArrayCopy(originalCameras);
  t.is(
    CameraAccess.adjustCamerasFromMainCameraStream(getFakeMediaStreamTrack("9", "environment", ""), cams),
    undefined
  );
  t.is(cams[0].cameraType, Camera.Type.FRONT);
  t.is(cams[1].cameraType, Camera.Type.BACK);
  t.is(cams[2].cameraType, Camera.Type.BACK);
});

// tslint:disable-next-line:max-func-body-length
test.serial("accessCameraStream", async t => {
  fakeCompatibleBrowser();
  const fakeEmptyBackCamera: Camera = {
    deviceId: "",
    label: "",
    cameraType: Camera.Type.BACK
  };

  resetStubs();
  let mediaStream: MediaStream = await CameraAccess.accessCameraStream(0, fakeEmptyBackCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      facingMode: { ideal: "environment" },
      width: { min: 1400, ideal: 1920, max: 1920 },
      height: { min: 900, ideal: 1440, max: 1440 }
    }
  });
  t.not(mediaStream, null);

  const fakeEmptyFrontCamera: Camera = {
    deviceId: "",
    label: "",
    cameraType: Camera.Type.FRONT
  };

  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(0, fakeEmptyFrontCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      facingMode: { ideal: "user" },
      width: { min: 1400, ideal: 1920, max: 1920 },
      height: { min: 900, ideal: 1440, max: 1440 }
    }
  });
  t.not(mediaStream, null);

  const fakeCamera: Camera = {
    deviceId: fakeCamera1.deviceId,
    label: fakeCamera1.label,
    cameraType: Camera.Type.BACK
  };

  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(0, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 1400, ideal: 1920, max: 1920 },
      height: { min: 900, ideal: 1440, max: 1440 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(1, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 1200, ideal: 1920, max: 1920 },
      height: { min: 900, ideal: 1200, max: 1200 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(2, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 1080, ideal: 1920, max: 1920 },
      height: { min: 900, ideal: 1080, max: 1080 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(3, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 960, ideal: 1280, max: 1440 },
      height: { min: 480, ideal: 960, max: 960 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(4, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 720, ideal: 1280, max: 1440 },
      height: { min: 480, ideal: 720, max: 768 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(5, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 640, ideal: 960, max: 1440 },
      height: { min: 480, ideal: 720, max: 720 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(6, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId }
    }
  });
  t.not(mediaStream, null);
});

test.serial("accessCameraStream (Safari)", async t => {
  fakeCompatibleBrowser();
  BrowserHelper.userAgentInfo.setUA(
    "Mozilla/5.0 (iPhone; CPU iPhone OS 11_3 like Mac OS X) " +
      "AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1"
  );

  const fakeCamera: Camera = {
    deviceId: fakeCamera1.deviceId,
    label: fakeCamera1.label,
    cameraType: Camera.Type.BACK
  };

  resetStubs();
  let mediaStream: MediaStream = await CameraAccess.accessCameraStream(0, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 1400, ideal: 1920, max: 1920 },
      height: { min: 900, ideal: 1080, max: 1440 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(1, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 1200, ideal: 1600, max: 1920 },
      height: { min: 900, ideal: 1080, max: 1200 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(2, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 1080, ideal: 1600, max: 1920 },
      height: { min: 900, ideal: 900, max: 1080 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(3, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 960, ideal: 1280, max: 1440 },
      height: { min: 480, ideal: 720, max: 960 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(4, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 720, ideal: 1024, max: 1440 },
      height: { min: 480, ideal: 768, max: 768 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(5, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId },
      width: { min: 640, ideal: 800, max: 1440 },
      height: { min: 480, ideal: 600, max: 720 }
    }
  });
  t.not(mediaStream, null);
  resetStubs();
  mediaStream = await CameraAccess.accessCameraStream(6, fakeCamera);
  t.true(getUserMediaStub.called);
  t.deepEqual(getUserMediaStub.args[0][0], {
    audio: false,
    video: {
      deviceId: { exact: fakeCamera.deviceId }
    }
  });
  t.not(mediaStream, null);
});