Basic WAL test

Tests/test_file_wal.py

@@ -0,0 +1,23 @@
+from helper import unittest, PillowTestCase
+
+from PIL import WalImageFile
+
+
+class TestFileWal(PillowTestCase):
+
+    def test_open(self):
+        # Arrange
+        TEST_FILE = "Tests/images/hopper.wal"
+
+        # Act
+        im = WalImageFile.open(TEST_FILE)
+
+        # Assert
+        self.assertEqual(im.format, "WAL")
+        self.assertEqual(im.format_description, "Quake2 Texture")
+        self.assertEqual(im.mode, "P")
+        self.assertEqual(im.size, (128, 128))
+
+
+if __name__ == '__main__':
+    unittest.main()

src/PIL/WalImageFile.py

@@ -74,6 +74,7 @@ def open(filename):
         with builtins.open(filename, "rb") as fp:
             return imopen(fp)
 
+
 quake2palette = (
     # default palette taken from piffo 0.93 by Hans Häggström
     b"\x01\x01\x01\x0b\x0b\x0b\x12\x12\x12\x17\x17\x17\x1b\x1b\x1b\x1e"