Add scripts for running tests with coverage

Author: slarse

.travis/covstring.py

@@ -0,0 +1,31 @@
+"""This utility script gathers the top level packages for wich coverage should
+be measured.
+"""
+import os
+
+PROJECT_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
+
+
+def gather_packages(cwd=PROJECT_ROOT):
+    """Return a list of all directories in cwd containing an ``__init__.py`` file."""
+    dirpaths = (path for path in os.listdir(PROJECT_ROOT) if os.path.isdir(path))
+    package_names = [
+        os.path.basename(path) for path in dirpaths if "__init__.py" in os.listdir(path)
+    ]
+    return package_names
+
+def generate_coverage_py_string(cwd=PROJECT_ROOT):
+    """Generate a string on the form ``--cov PACKAGE_1 --cov PACKAGE_2 ...`` such
+    that all packages found in cwd are traced using pytest-cov.
+    """
+    packages = gather_packages(cwd)
+    assert packages
+    
+    return "--cov " + " --cov ".join(packages)
+
+def main():
+    cov_string = generate_coverage_py_string()
+    print(cov_string)
+
+if __name__ == "__main__":
+    main()

run_tests.sh

@@ -0,0 +1,8 @@
+#! /bin/bash
+#
+# Script for running the test suite with branch coverage.
+
+# Coverage.py caches interfere with subsequent runs for some reason
+rm -f .coverage*
+
+python -m pytest tests/ $(python .travis/covstring.py) --cov-branch