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>

tools/binman/binman.py

@@ -26,6 +26,7 @@ sys.path.insert(0, 'scripts/dtc/pylibfdt')
 import cmdline
 import command
 import control
+import test_util
 
 def RunTests(debug, args):
     """Run the functional tests and any embedded doctests
@@ -78,34 +79,12 @@ def RunTests(debug, args):
 
 def RunTestCoverage():
     """Run the tests and check that we get 100% coverage"""
-    # This uses the build output from sandbox_spl to get _libfdt.so
-    cmd = ('PYTHONPATH=$PYTHONPATH:%s/sandbox_spl/tools python-coverage run '
-            '--include "tools/binman/*.py" --omit "*test*,*binman.py" '
-            'tools/binman/binman.py -t' % options.build_dir)
-    os.system(cmd)
-    stdout = command.Output('python-coverage', 'report')
-    lines = stdout.splitlines()
-
-    test_set= set([os.path.basename(line.split()[0])
-                     for line in lines if '/etype/' in line])
     glob_list = glob.glob(os.path.join(our_path, 'etype/*.py'))
     all_set = set([os.path.splitext(os.path.basename(item))[0]
                    for item in glob_list if '_testing' not in item])
-    missing_list = all_set
-    missing_list.difference_update(test_set)
-    coverage = lines[-1].split(' ')[-1]
-    ok = True
-    if missing_list:
-        print 'Missing tests for %s' % (', '.join(missing_list))
-        print stdout
-        ok = False
-    if coverage != '100%':
-        print stdout
-        print "Type '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')
+    test_util.RunTestCoverage('tools/binman/binman.py', None,
+            ['*test*', '*binman.py', 'tools/patman/*', 'tools/dtoc/*'],
+            options.build_dir, all_set)
 
 def RunBinman(options, args):
     """Main entry point to binman once arguments are parsed