Create west test command to run zmk testsuite.

app/scripts/west-commands.yml

@@ -0,0 +1,9 @@
+# Copyright (c) 2020, ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+west-commands:
+  - file: scripts/west_commands/test.py
+    commands:
+      - name: test
+        class: Test
+        help: run zmk testsuite

app/scripts/west_commands/test.py

@@ -0,0 +1,33 @@
+# Copyright (c) 2020 The ZMK Contributors
+#
+# SPDX-License-Identifier: MIT
+'''Test runner for ZMK.'''
+
+import os
+from textwrap import dedent            # just for nicer code indentation
+
+from west.commands import WestCommand
+from west import log                   # use this for user output
+
+
+class Test(WestCommand):
+    def __init__(self):
+        super().__init__(
+            'test',  # gets stored as self.name
+            'run zmk testsuite',  # self.help
+            # self.description:
+            dedent('''Run the zmk testsuite.'''))
+
+    def do_add_parser(self, parser_adder):
+        parser = parser_adder.add_parser(self.name,
+                                         help=self.help,
+                                         description=self.description)
+
+        parser.add_argument('test_path', default="all",
+                            help='The path to the test. Defaults to "all".', nargs="?")
+        return parser           # gets stored as self.parser
+
+    def do_run(self, args, unknown_args):
+        # the run-test script assumes the app directory is the current dir.
+        os.chdir(f'{self.topdir}/app')
+        exit(os.system(f'{self.topdir}/app/run-test.sh {args.test_path}'))