Fail the test when a DeprecationWarning is raised

Author: carmocca

setup.cfg

@@ -21,10 +21,15 @@ python_files =
     test_*.py
 # doctest_plus = disabled
 addopts =
-    --strict
+    --strict-markers
     --doctest-modules
     --color=yes
     --disable-pytest-warnings
+filterwarnings =
+    # error out on deprecation warnings - ensures the code and tests are kept up-to-date
+    error::DeprecationWarning
+    # TensorBoard is using NumPy deprecations: ignore them
+    ignore::DeprecationWarning:tensorboard.*
 
 junit_duration_report = call