test: raise an InputError with better info if modules are missing

The tests need to run as root (for uinput/evdev) so pip-installing a
package as user gets past the build check but then fails at runtime.
Let's make this bit easier to debug.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

1 files changed, 12 insertions, 4 deletions

diff --git a/test/__init__.py b/test/__init__.py
index 5f9a482..02d78ad 100644
--- a/test/__init__.py
+++ b/test/__init__.py
@@ -17,12 +17,20 @@
 from typing import Dict, List, Union
 from pathlib import Path
 
-import attr
 import enum
-import pytest
-import libevdev
 import logging
-import yaml
+
+try:
+    import attr
+    import pytest
+    import libevdev
+    import yaml
+except ImportError as e:
+    print("One or more modules are missing.")
+    print(
+        "PIP-installed packages must be installed as root if the test suite is run as root"
+    )
+    raise (e)
 
 import gi