Mechanism for testing imports

packages/cycler/meta.yaml

@@ -5,3 +5,7 @@ package:
 source:
   url: https://files.pythonhosted.org/packages/c2/4b/137dea450d6e1e3d474e1d873cd1d4f7d3beed7e0dc973b06e8e10d32488/cycler-0.10.0.tar.gz
   md5: 4cb42917ac5007d1cdff6cccfe2d016b
+
+test:
+  imports:
+    - cycler

test/test_common.py

+import pytest
+import os
+from pathlib import Path
+import sys
+
+BASE_DIR = Path(__file__).parent.parent
+PKG_DIR = BASE_DIR / 'packages'
+
+# TODO: remove once we have a proper Python package for common functions
+sys.path.append(str(BASE_DIR / 'tools'))
+import common  # noqa
+
+
+def registered_packages():
+    packages = [name for name in os.listdir(PKG_DIR)
+                if (PKG_DIR / name).is_dir()]
+    return packages
+
+
+@pytest.mark.parametrize('name', registered_packages())
+def test_meta(selenium, name):
+    # check that we can parse the meta.yaml
+    meta = common.parse_package(PKG_DIR / name / 'meta.yaml')
+
+    if 'test' in meta:
+        if 'imports' in meta['test']:
+            # check imports
+            for import_name in meta['test']['imports']:
+                selenium.load_package(import_name)
+                selenium.run('import %s' % import_name)