binman: Move coverage logic into a new test_util file

At present only binman has the logic for determining Python test coverage
but this is useful for other tools also. Move it out into a separate file
so it can be used by other tools.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/tools/patman/test_util.py b/tools/patman/test_util.py
new file mode 100644
index 0000000000..1a33c997c4
--- /dev/null
+++ b/tools/patman/test_util.py
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (c) 2016 Google, Inc
+#
+
+import glob
+import os
+import sys
+
+import command
+
+def RunTestCoverage(prog, filter_fname, exclude_list, build_dir, required=None):
+    """Run tests and check that we get 100% coverage
+
+    Args:
+        prog: Program to run (with be passed a '-t' argument to run tests
+        filter_fname: Normally all *.py files in the program's directory will
+            be included. If this is not None, then it is used to filter the
+            list so that only filenames that don't contain filter_fname are
+            included.
+        exclude_list: List of file patterns to exclude from the coverage
+            calculation
+        build_dir: Build directory, used to locate libfdt.py
+        required: List of modules which must be in the coverage report
+
+    Raises:
+        ValueError if the code coverage is not 100%
+    """
+    # This uses the build output from sandbox_spl to get _libfdt.so
+    path = os.path.dirname(prog)
+    if filter_fname:
+        glob_list = glob.glob(os.path.join(path, '*.py'))
+        glob_list = [fname for fname in glob_list if filter_fname in fname]
+    else:
+        glob_list = []
+    glob_list += exclude_list
+    glob_list += ['*libfdt.py', '*site-packages*']
+    cmd = ('PYTHONPATH=$PYTHONPATH:%s/sandbox_spl/tools python-coverage run '
+           '--omit "%s" %s -t' % (build_dir, ','.join(glob_list), prog))
+    os.system(cmd)
+    stdout = command.Output('python-coverage', 'report')
+    lines = stdout.splitlines()
+    if required:
+        # Convert '/path/to/name.py' just the module name 'name'
+        test_set = set([os.path.splitext(os.path.basename(line.split()[0]))[0]
+                        for line in lines if '/etype/' in line])
+        missing_list = required
+        missing_list.difference_update(test_set)
+        if missing_list:
+            print 'Missing tests for %s' % (', '.join(missing_list))
+            print stdout
+            ok = False
+
+    coverage = lines[-1].split(' ')[-1]
+    ok = True
+    print coverage
+    if coverage != '100%':
+        print stdout
+        print ("Type 'python-coverage html' to get a report in "
+               'htmlcov/index.html')
+        print 'Coverage error: %s, but should be 100%%' % coverage
+        ok = False
+    if not ok:
+        raise ValueError('Test coverage failure')