Added test of minMaxLoc on filling with maximums of int

modules/core/test/test_arithm.cpp

@@ -1792,7 +1792,6 @@ INSTANTIATE_TEST_CASE_P(Arithm, SubtractOutputMatNotEmpty, testing::Combine(
     testing::Values(-1, CV_16S, CV_32S, CV_32F),
     testing::Bool()));
 
-
 TEST(Core_FindNonZero, singular)
 {
     Mat img(10, 10, CV_8U, Scalar::all(0));
@@ -1816,3 +1815,21 @@ TEST(Core_BoolVector, support)
     ASSERT_EQ( nz, countNonZero(test) );
     ASSERT_FLOAT_EQ((float)nz/n, (float)(mean(test)[0]));
 }
+
+TEST(MinMaxLoc, Mat_IntMax_Without_Mask)
+{
+    Mat_<int> mat(50, 50);
+    int iMaxVal = numeric_limits<int>::max();
+    mat.setTo(iMaxVal);
+
+    double min, max;
+    Point minLoc, maxLoc;
+
+    minMaxLoc(mat, &min, &max, &minLoc, &maxLoc, Mat());
+
+    ASSERT_EQ(iMaxVal, min);
+    ASSERT_EQ(iMaxVal, max);
+
+    ASSERT_EQ(Point(0, 0), minLoc);
+    ASSERT_EQ(Point(0, 0), maxLoc);
+}