File: shapedetection-empty-input.html

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<!DOCTYPE html>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>

// This test verifies *Detector.detect() returns an empty list when fed with
// an empty HTMLImageElement.
const emptyInputTests =
    [
      {
        createDetector: () => { return new FaceDetector(); },
        name: "Face - detect(empty)"
      },
      {
        createDetector: () => { return new BarcodeDetector(); },
        name: "Barcode - detect(empty)"
      }
    ];

for (let emptyInputTest of emptyInputTests) {
  promise_test(async t =>{
    const img = new Image();
    const imgWatcher = new EventWatcher(t, img, ["load", "error"]);
    img.src = "";
    await imgWatcher.wait_for("error");

    const detector = emptyInputTest.createDetector();
    const detectionResult = await detector.detect(img);
    assert_equals(detectionResult.length, 0);
  }, emptyInputTest.name);
}

</script>