tests/testutils: Add dummy_context() helper

2 files changed, 47 insertions, 0 deletions

diff --git a/tests/testutils/__init__.py b/tests/testutils/__init__.py
index 9913e880d..25fa6d763 100644
--- a/tests/testutils/__init__.py
+++ b/tests/testutils/__init__.py
@@ -24,6 +24,7 @@
 #
 
 from .artifactshare import create_artifact_share, assert_shared, assert_not_shared
+from .context import dummy_context
 from .element_generators import create_element_size, update_element_size
 from .junction import generate_junction
 from .runner_integration import wait_for_cache_granularity
diff --git a/tests/testutils/context.py b/tests/testutils/context.py
new file mode 100644
index 000000000..899bad247
--- /dev/null
+++ b/tests/testutils/context.py
@@ -0,0 +1,46 @@
+#
+#  Copyright (C) 2019 Bloomberg Finance LP
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU Lesser General Public
+#  License as published by the Free Software Foundation; either
+#  version 2 of the License, or (at your option) any later version.
+#
+#  This library is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public
+#  License along with this library. If not, see <http://www.gnu.org/licenses/>.
+
+import os
+
+from contextlib import contextmanager
+
+from buildstream._context import Context
+
+
+# Handle messages from the pipeline
+def _dummy_message_handler(message, is_silenced):
+    pass
+
+
+# dummy_context()
+#
+# Context manager to create minimal context for tests.
+#
+# Args:
+#    config (filename): The configuration file, if any
+#
+@contextmanager
+def dummy_context(*, config=None):
+    with Context() as context:
+        if not config:
+            config = os.devnull
+
+        context.load(config=config)
+
+        context.messenger.set_message_handler(_dummy_message_handler)
+
+        yield context