Convert from unittest to pytest

Tests/test_sgi_crash.py

@@ -1,18 +1,14 @@
 #!/usr/bin/env python
+import pytest
 from PIL import Image
 
-from .helper import PillowTestCase
 
-repro = (
-    "Tests/images/sgi_overrun_expandrowF04.bin",
-    "Tests/images/sgi_crash.bin",
+@pytest.mark.parametrize(
+    "test_file",
+    ["Tests/images/sgi_overrun_expandrowF04.bin", "Tests/images/sgi_crash.bin"],
 )
-
-
-class TestSgiCrashes(PillowTestCase):
-    def test_crashes(self):
-        for path in repro:
-            with open(path, "rb") as f:
-                im = Image.open(f)
-                with self.assertRaises(IOError):
-                    im.load()
+def test_crashes(test_file):
+    with open(test_file, "rb") as f:
+        im = Image.open(f)
+        with pytest.raises(IOError):
+            im.load()