Add back missing file

Author: saville

tests/test_runner.py

@@ -0,0 +1,52 @@
+import os
+import sys
+import docker.errors
+
+sys.path.insert(0, os.path.realpath(os.path.join(os.path.dirname(__file__), "..")))
+
+import buildrunner.config.loader  # noqa: E402
+from buildrunner.docker.daemon import DAEMON_IMAGE_NAME  # noqa: E402
+from buildrunner import docker as buildrunner_docker  # noqa: E402
+from buildrunner import (  # noqa: E402
+    cli,
+    __version__,
+    BuildRunnerConfigurationError,
+)
+
+
+def run_tests(argv, master_config_file=None, global_config_files=None):
+    args = cli.parse_args(argv)
+
+    # are we just printing the version?
+    if args.print_version:
+        print(__version__)
+        return os.EX_OK
+
+    global_config_files = global_config_files or []
+    if master_config_file:
+        buildrunner.config.loader.MASTER_GLOBAL_CONFIG_FILE = master_config_file
+        if not global_config_files or master_config_file != global_config_files[0]:
+            global_config_files.insert(0, master_config_file)
+    if global_config_files:
+        buildrunner.config.DEFAULT_GLOBAL_CONFIG_FILES = global_config_files
+
+    try:
+        build_runner = cli.initialize_br(args)
+
+        # Pull Docker daemon proxy
+        image_name = f"{build_runner.buildrunner_config.global_config.docker_registry}/{DAEMON_IMAGE_NAME}"
+        docker_client = buildrunner_docker.new_client(
+            timeout=build_runner.docker_timeout
+        )
+        docker_client.pull(image_name)
+
+        build_runner.run()
+        if build_runner.exit_code:
+            return build_runner.exit_code
+    except BuildRunnerConfigurationError as brce:
+        print(str(brce))
+        return os.EX_CONFIG
+    except docker.errors.ImageNotFound as inf:
+        print(str(inf))
+        return os.EX_CONFIG
+    return os.EX_OK