Test saving with incorrect mode

Author: radarhere

Tests/test_file_tga.py

@@ -4,7 +4,7 @@
 
 from PIL import Image
 
-from .helper import PillowTestCase
+from .helper import PillowTestCase, hopper
 
 _TGA_DIR = os.path.join("Tests", "images", "tga")
 _TGA_DIR_COMMON = os.path.join(_TGA_DIR, "common")
@@ -112,6 +112,13 @@ def test_save(self):
         with Image.open(out) as test_im:
             self.assertEqual(test_im.size, (100, 100))
 
+    def test_save_wrong_mode(self):
+        im = hopper("PA")
+        out = self.tempfile("temp.tga")
+
+        with self.assertRaises(OSError):
+            im.save(out)
+
     def test_save_id_section(self):
         test_file = "Tests/images/rgb32rle.tga"
         with Image.open(test_file) as im:

Tests/test_file_xbm.py

@@ -2,7 +2,7 @@
 
 from PIL import Image
 
-from .helper import PillowTestCase
+from .helper import PillowTestCase, hopper
 
 PIL151 = b"""
 #define basic_width 32
@@ -58,3 +58,10 @@ def test_open_filename_with_underscore(self):
             # Assert
             self.assertEqual(im.mode, "1")
             self.assertEqual(im.size, (128, 128))
+
+    def test_save_wrong_mode(self):
+        im = hopper()
+        out = self.tempfile("temp.xbm")
+
+        with self.assertRaises(OSError):
+            im.save(out)