check length

Author: piercus

test/tests/modules/tracking/trackerTests.js

@@ -173,7 +173,7 @@ module.exports = () => {
           tracker[addMethod](testImg, new cv.Rect(0, 0, 10, 10));
         });
         const rects = tracker.update(testImg);
-        expect(rects).to.be.an('array').lengthOf(7);
+        expect(rects).to.be.an('array').lengthOf(methods.length));
         rects.forEach((rect) => {
           expect(rect).to.be.instanceOf(cv.Rect);
         });