.travis.yml: Invoke pytest directly

Removes tests.sh wrapper and env_variables.sh

Add coverage plugins to provide environment variables.

.travis.yml

@@ -188,7 +188,7 @@ before_script:
 script:
   - python setup.py bdist_wheel
   - pip install $(ls ./dist/*.whl)"[alldeps]"
-  - bash .ci/tests.sh
+  - pytest
   # Ensure bear requirements are in sync with the bear PipRequirement
   - .ci/generate_bear_requirements.py --check --update
   - git diff --exit-code

setup.cfg

@@ -24,11 +24,35 @@ env =
 # PYTHONHASHSEED=0 is required to use same hashes in pytests-xdist's workers
 python_paths = .ci/
 
+[coverage:coverage_env_plugin]
+markers = True
+
 [coverage:run]
 branch = True
 cover_pylib = False
+
+plugins =
+  coverage_env_plugin
+  coverage_config_reload_plugin
+
 source =
   bears
 
+omit =
+  tests/*
+  setup.py
+  .ci/*
+  tests/python/bandit_test_files/
+
 [coverage:report]
+fail_under = 100
 show_missing = True
+skip_covered = False
+sort = Miss
+exclude_lines =
+  pragma: no ?cover
+  pragma ${PLATFORM_SYSTEM}: no cover
+  pragma ${OS_NAME}: no cover
+  pragma Python [0-9.,]*${PYTHON_VERSION}[0-9.,]*: no cover
+
+[coverage:force_end_of_section]