wqadded new way to get mime type

tests/test_mime_types.py

@@ -0,0 +1,24 @@
+import unittest
+
+from src.mime_types import MimeTypes
+
+
+class TestMimeTypes(unittest.TestCase):
+  def test_mime_type_image(self):
+    mime_type = MimeTypes(file_type="image")
+    assert mime_type.image
+    assert not mime_type.video
+    assert not mime_type.unsupported_file_type
+
+  def test_mime_type_video(self):
+    mime_type = MimeTypes(file_type="video")
+    assert not mime_type.image
+    assert mime_type.video
+    assert not mime_type.unsupported_file_type
+
+  def test_mime_type_unsupported_file_type(self):
+    mime_type = MimeTypes(file_type="not_a_valid_file_type")
+    assert not mime_type.image
+    assert not mime_type.video
+    assert mime_type.unsupported_file_type
+