Adapt test suite to skip metrics tests if shapely not found

Author: gatli

.circleci/config.yml

@@ -17,10 +17,10 @@ jobs:
       - run:
           name: Install Environment Dependencies
           command: | # install dependencies
-            apt-get -y install curl
-            pip install --upgrade pip 
+            apt-get -y install curl libgeos-dev
+            pip install --upgrade pip
             pip install poetry
-            poetry install
+            poetry install -E metrics
 
       - run:
           name: Black Formatting Check # Only validation, without re-formatting

tests/metrics/__init__.py

@@ -0,0 +1,9 @@
+import pytest
+
+try:
+    import shapely
+except ModuleNotFoundError:
+    pytest.skip(
+        "Skipping metrics tests (to run install with poetry install -E metrics)",
+        allow_module_level=True,
+    )

tests/metrics/test_polygon_metrics.py

@@ -1,9 +1,10 @@
 from copy import deepcopy
 
+import pkg_resources
 import pytest
 
 from nucleus.metrics import PolygonIOU, PolygonPrecision, PolygonRecall
-from nucleus.metrics.base import Metric, MetricResult
+from nucleus.metrics.base import MetricResult
 from tests.metrics.helpers import (
     TEST_ANNOTATION_LIST,
     TEST_BOX_ANNOTATION_LIST,