Add a test case when opencv is installed, enable both scenario (#1740)

* Add a test case when opencv is installed, enable both scenario

Signed-off-by: tangy5 <[email protected]>

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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---------

Signed-off-by: tangy5 <[email protected]>
Co-authored-by: tangy5 <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

tests/unit/transform/test_post.py

@@ -9,6 +9,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import importlib.util
 import os
 import tempfile
 import unittest
@@ -56,14 +57,22 @@
     (1, 6, 6),
 ]
 
-FINDCONTOURSD_DATA = [
+FINDCONTOURSD_DATA_NO_OPENCV = [
     {"keys": "pred", "labels": "Other", "min_positive": 4, "min_poly_area": 1},
     {
         "pred": np.array([[0, 0, 0, 0, 0], [0, 1, 1, 1, 0], [0, 1, 0, 1, 0], [0, 1, 1, 1, 0], [0, 0, 0, 0, 0]]),
     },
     [[[3, 4], [1, 4], [0, 3], [0, 1], [1, 0], [3, 0], [4, 1], [4, 3], [3, 4]]],
 ]
 
+FINDCONTOURSD_DATA_OPENCV = [
+    {"keys": "pred", "labels": "Other", "min_positive": 4, "min_poly_area": 1},
+    {
+        "pred": np.array([[0, 0, 0, 0, 0], [0, 1, 1, 1, 0], [0, 1, 0, 1, 0], [0, 1, 1, 1, 0], [0, 0, 0, 0, 0]]),
+    },
+    [[[1, 2], [2, 1], [3, 2], [2, 3]], [[1, 1], [1, 3], [3, 3], [3, 1]]],
+]
+
 DUMPIMAGEPREDICTION2DD_DATA = [
     {
         "image": np.random.rand(1, 3, 5, 5),
@@ -114,8 +123,12 @@ def test_result(self, args, input_data, expected_shape):
         self.assertEqual(res["pred"].shape, expected_shape)
 
 
+def is_opencv_installed():
+    return importlib.util.find_spec("cv2") is not None
+
+
 class TestFindContoursd(unittest.TestCase):
-    @parameterized.expand([FINDCONTOURSD_DATA])
+    @parameterized.expand([FINDCONTOURSD_DATA_OPENCV if is_opencv_installed() else FINDCONTOURSD_DATA_NO_OPENCV])
     def test_result(self, args, input_data, expected_output):
         res = FindContoursd(**args)(input_data)
         self.assertEqual(res["result"]["annotation"]["elements"][0]["contours"], expected_output)