added tests on cv.CreateImage() (thanks to mythsmith).

modules/python/test/ticket_6.py

@@ -12,5 +12,65 @@ class TestLoadImage(unittest.TestCase):
         cvim = cv.LoadImage("large.jpg")
         self.assert_(len(pilim.tostring()) == len(cvim.tostring()))
 
+class Creating(unittest.TestCase):
+    size=(640, 480)
+    repeat=100
+    def test_0_Create(self):
+        image = cv.CreateImage(self.size, cv.IPL_DEPTH_8U, 1)
+        cnt=cv.CountNonZero(image)
+        self.assertEqual(cnt, 0, msg="Created image is not black. CountNonZero=%i" % cnt)
+
+    def test_2_CreateRepeat(self):
+        cnt=0
+        for i in range(self.repeat):
+            image = cv.CreateImage(self.size, cv.IPL_DEPTH_8U, 1)
+            cnt+=cv.CountNonZero(image)
+        self.assertEqual(cnt, 0, msg="Created images are not black. Mean CountNonZero=%.3f" % (1.*cnt/self.repeat))
+
+    def test_2a_MemCreated(self):
+        cnt=0
+        v=[]
+        for i in range(self.repeat):
+            image = cv.CreateImage(self.size, cv.IPL_DEPTH_8U, 1)
+            cv.FillPoly(image, [[(0, 0), (0, 100), (100, 0)]], 0)
+            cnt+=cv.CountNonZero(image)
+            v.append(image)
+        self.assertEqual(cnt, 0, msg="Memorized images are not black. Mean CountNonZero=%.3f" % (1.*cnt/self.repeat))
+
+    def test_3_tostirng(self):
+        image = cv.CreateImage(self.size, cv.IPL_DEPTH_8U, 1)
+        image.tostring()
+        cnt=cv.CountNonZero(image)
+        self.assertEqual(cnt, 0, msg="After tostring(): CountNonZero=%i" % cnt)
+
+    def test_40_tostringRepeat(self):
+        cnt=0
+        image = cv.CreateImage(self.size, cv.IPL_DEPTH_8U, 1)
+        cv.Set(image, cv.Scalar(0,0,0,0))
+        for i in range(self.repeat*100):
+            image.tostring()
+        cnt=cv.CountNonZero(image)
+        self.assertEqual(cnt, 0, msg="Repeating tostring(): Mean CountNonZero=%.3f" % (1.*cnt/self.repeat))
+
+    def test_41_CreateToStringRepeat(self):
+        cnt=0
+        for i in range(self.repeat*100):
+            image = cv.CreateImage(self.size, cv.IPL_DEPTH_8U, 1)
+            cv.Set(image, cv.Scalar(0,0,0,0))
+            image.tostring()
+            cnt+=cv.CountNonZero(image)
+        self.assertEqual(cnt, 0, msg="Repeating create and tostring(): Mean CountNonZero=%.3f" % (1.*cnt/self.repeat))
+
+    def test_4a_MemCreatedToString(self):
+        cnt=0
+        v=[]
+        for i in range(self.repeat):
+            image = cv.CreateImage(self.size, cv.IPL_DEPTH_8U, 1)
+            cv.Set(image, cv.Scalar(0,0,0,0))
+            image.tostring()
+            cnt+=cv.CountNonZero(image)
+            v.append(image)
+        self.assertEqual(cnt, 0, msg="Repeating and memorizing after tostring(): Mean CountNonZero=%.3f" % (1.*cnt/self.repeat))
+
 if __name__ == '__main__':
     unittest.main()