Added more main tests

tests/test_main.py

@@ -5,6 +5,7 @@ from unittest.mock import patch
 from wavinfo.__main__ import main
 
 import sys
+import glob
 
 class MainTest(unittest.TestCase):
     
@@ -15,3 +16,18 @@ class MainTest(unittest.TestCase):
             except:
                 self.fail("main() throwing an exception")
 
+    def test_a_file(self):
+        for path in glob.glob("tests/test_files/**/*.wav"):
+            with patch.object(sys, 'argv', [path]):
+                try:
+                    main()
+                except:
+                    self.fail("main() throwing an exception") 
+
+    def test_ixml(self):
+        with patch.object(sys, 'argv', 
+                          ['tests/test_files/sounddevices/A101_1.WAV']):
+            try:
+                main()
+            except:
+                self.fail("main() throwing an exception")