refactored gpu tests a little

tests/gpu/src/arithm.cpp

@@ -679,9 +679,14 @@ struct CV_GpuMinMaxTest: public CvTest
     cv::gpu::GpuMat buf;
 
     void run(int)
+    {
+        try
         {
             int depth_end;
-        if (cv::gpu::hasNativeDoubleSupport(cv::gpu::getDevice())) depth_end = CV_64F; else depth_end = CV_32F;
+            if (cv::gpu::hasNativeDoubleSupport(cv::gpu::getDevice())) 
+                depth_end = CV_64F; 
+            else 
+                depth_end = CV_32F;
             for (int depth = CV_8U; depth <= depth_end; ++depth)
             {
                 for (int i = 0; i < 3; ++i)
@@ -693,6 +698,12 @@ struct CV_GpuMinMaxTest: public CvTest
                 }
             }
         }
+        catch (const Exception& e)
+        {
+            if (!check_and_treat_gpu_exception(e, ts)) throw;
+            return;
+        }
+    }
 
     void test(int rows, int cols, int cn, int depth)
     {
@@ -803,9 +814,14 @@ struct CV_GpuMinMaxLocTest: public CvTest
     GpuMat valbuf, locbuf;
 
     void run(int)
+    {
+        try 
         {
             int depth_end;
-        if (cv::gpu::hasNativeDoubleSupport(cv::gpu::getDevice())) depth_end = CV_64F; else depth_end = CV_32F;
+            if (cv::gpu::hasNativeDoubleSupport(cv::gpu::getDevice())) 
+                depth_end = CV_64F; 
+            else 
+                depth_end = CV_32F;
             for (int depth = CV_8U; depth <= depth_end; ++depth)
             {
                 int rows = 1, cols = 3;
@@ -818,6 +834,12 @@ struct CV_GpuMinMaxLocTest: public CvTest
                 }
             }
         }
+        catch (const Exception& e)
+        {
+            if (!check_and_treat_gpu_exception(e, ts)) throw;
+            return;
+        }
+    }
 
     void test(int rows, int cols, int depth)
     {
@@ -875,9 +897,13 @@ struct CV_GpuCountNonZeroTest: CvTest
 
     void run(int) 
     {
-        srand(0);
+        try
+        {
             int depth_end;
-        if (cv::gpu::hasNativeDoubleSupport(cv::gpu::getDevice())) depth_end = CV_64F; else depth_end = CV_32F;
+            if (cv::gpu::hasNativeDoubleSupport(cv::gpu::getDevice())) 
+                depth_end = CV_64F; 
+            else 
+                depth_end = CV_32F;
             for (int depth = CV_8U; depth <= CV_32F; ++depth)
             {
                 for (int i = 0; i < 4; ++i)
@@ -888,6 +914,12 @@ struct CV_GpuCountNonZeroTest: CvTest
                 }
             }
         }
+        catch (const Exception& e)
+        {
+            if (!check_and_treat_gpu_exception(e, ts)) throw;
+            return;
+        }
+    }
 
     void test(int rows, int cols, int depth)
     {