<!DOCTYPE html>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<script src="file:///gen/layout_test_data/mojo/public/js/mojo_bindings.js"></script>
<script src="file:///gen/device/vr/public/mojom/vr_service.mojom.js"></script>
<script src="../external/wpt/resources/chromium/webxr-test.js"></script>
<script src="resources/vr-test-utils.js "></script>
<script src="resources/test-constants.js"></script>

<canvas id="webgl-canvas"></canvas>
<script src="resources/presentation-setup.js"></script>
<script>
let fakeDisplays = fakeVRDisplays();

vr_test( (t) => {
  return navigator.getVRDisplays().then( (displays) => {
    var display = displays[0];

    t.step( () => {
      assert_equals(display.getLayers().length, 0);
    }, "No layers initially returned");

    runWithUserGesture( () => {
      display.requestPresent([{ source : webglCanvas }]).then( () => {
        t.step( () => {
          let layers = display.getLayers();
          assert_equals(layers.length, 1);
          let layer = layers[0];

          assert_equals(layer.source, webglCanvas);
          assert_equals(layer.leftBounds.length, 4);
          assert_equals(layer.rightBounds.length, 4);

          let expectedLeft = [0.0, 0.0, 0.5, 1.0];
          let expectedRight = [0.5, 0.0, 0.5, 1.0];
          for (let i = 0; i < layer.leftBounds.length; i++) {
            assert_approx_equals(layer.leftBounds[i], expectedLeft[i],
                FLOAT_EPSILON);
            assert_approx_equals(layer.rightBounds[i], expectedRight[i],
                FLOAT_EPSILON);
          }
        }, "Layer is correct");
      }, (err) => {
        t.step( () => {
          assert_unreached();
        }, "requestPresent failed");
      }).then( () => {
        t.done();
      });
    });
  }, (err) => {
    t.step( () => {
      assert_unreached();
    }, "getVRDisplays rejected");
    t.done();
  });
}, [fakeDisplays["Pixel"]],
"Test getLayers returns given canvas and default bounds when expected");

</script>