Added a test for matrix-to-vector copy and convert.

modules/core/test/test_mat.cpp

@@ -897,3 +897,24 @@ TEST(Core_Mat, reshape_1942)
     );
     ASSERT_EQ(1, cn);
 }
+
+TEST(Core_Mat, copyNx1ToVector)
+{
+    cv::Mat_<uchar> src(5, 1);
+    cv::Mat_<uchar> ref_dst8;
+    cv::Mat_<ushort> ref_dst16;
+    std::vector<uchar> dst8;
+    std::vector<ushort> dst16;
+
+    src << 1, 2, 3, 4, 5;
+
+    src.copyTo(ref_dst8);
+    src.copyTo(dst8);
+
+    ASSERT_PRED_FORMAT2(cvtest::MatComparator(0, 0), ref_dst8, cv::Mat_<uchar>(dst8));
+
+    src.convertTo(ref_dst16, CV_16U);
+    src.convertTo(dst16, CV_16U);
+
+    ASSERT_PRED_FORMAT2(cvtest::MatComparator(0, 0), ref_dst16, cv::Mat_<ushort>(dst16));
+}