Completed countNonZero test (found that it's already exist, so new implementation isn't used now).

modules/imgproc/test/test_boundingrect.cpp

@@ -22,7 +22,17 @@ CV_BoundingRectTest::~CV_BoundingRectTest() {}
 
 void CV_BoundingRectTest::run(int)
 {
+ const int MAX_WIDTH = 100;
+ const int MAX_HEIGHT = 100;
+ const int N = 100;
 
+ RNG& rng = ts->get_rng();
+
+ for (size_t i = 0; i < N; ++i)
+ {
+  int w = rng.next()%MAX_WIDTH + 1, h = rng.next()%MAX_HEIGHT + 1;
+  cv::Mat src(h, w, CV_8U); cv::randu(src, Scalar_<bool>::all(false), Scalar_<bool>::all(true));
+ }
 }
 
 TEST (Imgproc_BoundingRect, accuracy) { CV_BoundingRectTest test; test.safe_run(); }
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