Sanity tests for SgiImagePlugin.py

Tests/test_file_sgi.py

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+from helper import unittest, PillowTestCase
+
+from PIL import Image
+
+
+class TestFileSgi(PillowTestCase):
+
+    def sanity(self, filename, expected_mode, expected_size=(128, 128)):
+        # Act
+        im = Image.open(filename)
+
+        # Assert
+        self.assertEqual(im.mode, expected_mode)
+        self.assertEqual(im.size, expected_size)
+        print filename, im.mode
+
+    def test_rgb(self):
+        # Arrange
+        # Created with ImageMagick then renamed:
+        # convert lena.ppm lena.sgi
+        test_file = "Tests/images/lena.rgb"
+        expected_mode = "RGB"
+
+        # Act / Assert
+        self.sanity(test_file, expected_mode)
+
+    def test_l(self):
+        # Arrange
+        # Created with ImageMagick then renamed:
+        # convert lena.ppm -monochrome lena.sgi
+        test_file = "Tests/images/lena.bw"
+        expected_mode = "L"
+
+        # Act / Assert
+        self.sanity(test_file, expected_mode)
+
+    def test_rgba(self):
+        # Arrange
+        # Created with ImageMagick:
+        # convert transparent.png transparent.sgi
+        test_file = "Tests/images/transparent.sgi"
+        expected_mode = "RGBA"
+        expected_size = (200, 150)
+
+        # Act / Assert
+        self.sanity(test_file, expected_mode, expected_size)
+
+
+if __name__ == '__main__':
+    unittest.main()
+
+# End of file