update: test scan_apk() with both aapt and androguard

#568

tests/update.TestCase

@@ -338,6 +338,31 @@ class UpdateTest(unittest.TestCase):
         if os.path.basename(os.getcwd()) != 'tests':
             raise Exception('This test must be run in the "tests/" subdir')
 
+        try:
+            config['aapt'] = fdroidserver.common.find_sdk_tools_cmd('aapt')
+        except fdroidserver.exception.FDroidException:
+            pass  # aapt is not required if androguard is present
+
+        for use_androguard in (True, False):
+            print('USE_ANDROGUARD', use_androguard)
+            if use_androguard:
+                try:
+                    import androguard
+                    androguard
+
+                    def func():
+                        return True
+                    fdroidserver.common.use_androguard = func
+                except ImportError:
+                    continue
+            else:
+                if 'aapt' in config:
+                    def func():
+                        return False
+                    fdroidserver.common.use_androguard = func
+                else:
+                    continue
+
             apk_info = fdroidserver.update.scan_apk('repo/souch.smsbypass_9.apk')
             self.assertIsNone(apk_info.get('maxSdkVersion'))
             self.assertEqual(apk_info.get('versionName'), '0.9')