scanner: fix tests so they work on all tested platforms

The standard test configuration is needed to make the tests reliably. Also,
these tests used some odd yield logic.  Who knows what exactly failed, but
these tests should be reliable.

* https://gitlab.com/fdroid/fdroidserver/-/jobs/44984595
* https://gitlab.com/fdroid/fdroidserver/-/jobs/44984596
* https://travis-ci.org/f-droid/fdroidserver/builds/318071369

tests/scanner.TestCase

@@ -1,25 +1,41 @@
 #!/usr/bin/env python3
 
-import unittest
+import glob
+import inspect
+import logging
 import optparse
-from pathlib import Path
-from os.path import basename, dirname, realpath
+import os
+import sys
+import unittest
+
+localmodule = os.path.realpath(
+    os.path.join(os.path.dirname(inspect.getfile(inspect.currentframe())), '..'))
+print('localmodule: ' + localmodule)
+if localmodule not in sys.path:
+    sys.path.insert(0, localmodule)
 
-from fdroidserver import scanner
-from fdroidserver.metadata import Build
 import fdroidserver.common
+import fdroidserver.metadata
+import fdroidserver.scanner
 
 
 class ScannerTest(unittest.TestCase):
+
+    def setUp(self):
+        logging.basicConfig(level=logging.INFO)
+        self.basedir = os.path.join(localmodule, 'tests')
+
     def test_scan_source_files(self):
-        source_files = Path(dirname(realpath(__file__)), 'source-files')
+        source_files = os.path.join(self.basedir, 'source-files')
         projects = {
             'Zillode': 1,
             'firebase-suspect': 1
         }
-        for d in (str(p) for p in source_files.iterdir()):
-            fatal_problems = scanner.scan_source(d, Build())
-            self.assertEqual(projects.get(basename(d), 0), fatal_problems)
+        for d in glob.glob(os.path.join(source_files, '*')):
+            build = fdroidserver.metadata.Build()
+            fatal_problems = fdroidserver.scanner.scan_source(d, build)
+            self.assertEqual(projects.get(os.path.basename(d), 0),
+                             fatal_problems)
 
 
 if __name__ == "__main__":