OpenCV_4.2.0/opencv-4.2.0/modules/js/test/test_video.js

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// //////////////////////////////////////////////////////////////////////////////////////
// Author: Sajjad Taheri, University of California, Irvine. sajjadt[at]uci[dot]edu
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if (typeof module !== 'undefined' && module.exports) {
    // The environment is Node.js
    var cv = require('./opencv.js'); // eslint-disable-line no-var
}

QUnit.module('Video', {});
QUnit.test('Background Segmentation', function(assert) {
    // BackgroundSubtractorMOG2
    {
        const history = 600;
        const varThreshold = 15;
        const detectShadows = true;

        let mog2 = new cv.BackgroundSubtractorMOG2(history, varThreshold, detectShadows);

        assert.equal(mog2 instanceof cv.BackgroundSubtractorMOG2, true);

        mog2.delete();

        mog2 = new cv.BackgroundSubtractorMOG2();

        assert.equal(mog2 instanceof cv.BackgroundSubtractorMOG2, true);

        mog2.delete();

        mog2 = new cv.BackgroundSubtractorMOG2(history);

        assert.equal(mog2 instanceof cv.BackgroundSubtractorMOG2, true);

        mog2.delete();

        mog2 = new cv.BackgroundSubtractorMOG2(history, varThreshold);

        assert.equal(mog2 instanceof cv.BackgroundSubtractorMOG2, true);

        mog2.delete();
    }
});