buildman: Enable test coverage

Enable measuring test coverage for buildman so we can see the gaps. It is
currently at 68%.

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

tools/buildman/cmdline.py

@@ -142,6 +142,8 @@ def add_after_m(parser):
                           help='Skip tests which need the network')
         parser.add_argument('-t', '--test', action='store_true', dest='test',
                           default=False, help='run tests')
+        parser.add_argument('--coverage', action='store_true',
+                            help='Calculated test coverage')
     parser.add_argument('-T', '--threads', type=int,
           default=None,
           help='Number of builder threads to use (0=single-thread)')

tools/buildman/main.py

@@ -48,12 +48,22 @@ def run_tests(skip_net_tests, debug, verbose, args):
     # Run the entry tests first ,since these need to be the first to import the
     # 'entry' module.
     result = test_util.run_test_suites(
-        'buildman', debug, verbose, False, None, test_name, [],
+        'buildman', debug, verbose, False, args.threads, test_name, [],
         [test.TestBuild, func_test.TestFunctional,
          'buildman.toolchain', 'patman.gitutil'])
 
     return (0 if result.wasSuccessful() else 1)
 
+def run_test_coverage():
+    """Run the tests and check that we get 100% coverage"""
+    test_util.run_test_coverage(
+        'tools/buildman/buildman', None,
+        ['tools/patman/*.py', 'tools/u_boot_pylib/*', '*test_fdt.py',
+         'tools/buildman/kconfiglib.py', 'tools/buildman/*test*.py',
+         'tools/buildman/main.py'],
+        '/tmp/b', single_thread='-T1')
+
+
 def run_buildman():
     """Run bulidman
 
@@ -69,6 +79,9 @@ def run_buildman():
     if cmdline.HAS_TESTS and args.test:
         return run_tests(args.skip_net_tests, args.debug, args.verbose, args)
 
+    elif cmdline.HAS_TESTS and args.coverage:
+        run_test_coverage()
+
     elif args.full_help:
         tools.print_full_help(str(files('buildman').joinpath('README.rst')))
 

tools/u_boot_pylib/test_util.py

@@ -24,7 +24,7 @@ except:
 
 
 def run_test_coverage(prog, filter_fname, exclude_list, build_dir, required=None,
-                    extra_args=None):
+                    extra_args=None, single_thread='-P1'):
     """Run tests and check that we get 100% coverage
 
     Args:
@@ -39,6 +39,9 @@ def run_test_coverage(prog, filter_fname, exclude_list, build_dir, required=None
         required: List of modules which must be in the coverage report
         extra_args (str): Extra arguments to pass to the tool before the -t/test
             arg
+        single_thread (str): Argument string to make the tests run
+            single-threaded. This is necessary to get proper coverage results.
+            The default is '-P0'
 
     Raises:
         ValueError if the code coverage is not 100%
@@ -58,8 +61,9 @@ def run_test_coverage(prog, filter_fname, exclude_list, build_dir, required=None
     if build_dir:
         prefix = 'PYTHONPATH=$PYTHONPATH:%s/sandbox_spl/tools ' % build_dir
     cmd = ('%spython3-coverage run '
-           '--omit "%s" %s %s %s -P1' % (prefix, ','.join(glob_list),
-                                         prog, extra_args or '', test_cmd))
+           '--omit "%s" %s %s %s %s' % (prefix, ','.join(glob_list),
+                                        prog, extra_args or '', test_cmd,
+                                        single_thread or '-P1'))
     os.system(cmd)
     stdout = command.output('python3-coverage', 'report')
     lines = stdout.splitlines()