Update filepaths to plotly_utils tests

Author: marthacryan

.circleci/config.yml

@@ -67,7 +67,7 @@ commands:
           name: Test utils
           command: |
             . venv/bin/activate
-            pytest _plotly_utils/tests/
+            pytest tests/test_plotly_utils/
           no_output_timeout: 20m
       - run:
           name: Test io

tests/test_core/test_graph_objs/test_properties_validated.py

@@ -12,7 +12,7 @@ def setUp(self):
     def test_validators_work_attr(self):
         """
         Note: all of the individual validators are tested in
-        `_plotly_utils/tests/validators`. Here we're just making sure that
+        `tests/test_plotly_utils/validators`. Here we're just making sure that
         datatypes make use of validators
         """
         with pytest.raises(ValueError):
@@ -21,7 +21,7 @@ def test_validators_work_attr(self):
     def test_validators_work_item(self):
         """
         Note: all of the individual validators are tested in
-        `_plotly_utils/tests/validators`. Here we're just making sure that
+        `tests/test_plotly_utils/validators`. Here we're just making sure that
         datatypes make use of validators
         """
         with pytest.raises(ValueError):

tests/test_optional/test_utils/test_utils.py

@@ -400,7 +400,7 @@ def test_pil_image_encoding(self):
         import _plotly_utils
 
         img_path = os.path.join(
-            _plotly_utils.__path__[0], "tests", "resources", "1x1-black.png"
+            os.path.dirname(os.path.abspath(__file__)), "..", "..", "test_plotly_utils", "resources", "1x1-black.png"
         )
 
         with open(img_path, "rb") as f: