Tests for DcxImagePlugin.dcx

Tests/test_file_dcx.py

@@ -0,0 +1,45 @@
+from helper import unittest, PillowTestCase, lena
+
+from PIL import Image, DcxImagePlugin
+
+# Created with ImageMagick: convert lena.ppm lena.dcx
+TEST_FILE = "Tests/images/lena.dcx"
+
+
+class TestFileDcx(PillowTestCase):
+
+    def test_sanity(self):
+        # Arrange
+
+        # Act
+        im = Image.open(TEST_FILE)
+
+        # Assert
+        self.assertEqual(im.size, (128, 128))
+        self.assertIsInstance(im, DcxImagePlugin.DcxImageFile)
+        orig = lena()
+        self.assert_image_equal(im, orig)
+
+    def test_tell(self):
+        # Arrange
+        im = Image.open(TEST_FILE)
+
+        # Act
+        frame = im.tell()
+
+        # Assert
+        self.assertEqual(frame, 0)
+
+    def test_seek_too_far(self):
+        # Arrange
+        im = Image.open(TEST_FILE)
+        frame = 999  # too big on purpose
+
+        # Act / Assert
+        self.assertRaises(EOFError, lambda: im.seek(frame))
+
+
+if __name__ == '__main__':
+    unittest.main()
+
+# End of file