Better handle running the tests without PIL installed.

3 files changed, 23 insertions, 0 deletions

diff --git a/scss/tests/functions/compass/test_images.py b/scss/tests/functions/compass/test_images.py
index a5d0312..025a32e 100644
--- a/scss/tests/functions/compass/test_images.py
+++ b/scss/tests/functions/compass/test_images.py
@@ -20,6 +20,7 @@ import pytest
 from scss import config
 from scss.calculator import Calculator
 from scss.extension.compass import CompassExtension
+from scss.tests.util import needs_PIL
 
 
 # TODO many of these tests could also stand to test for failure cases
@@ -36,6 +37,7 @@ def test_image_url(calc):
 
 
 # inline-image
+@needs_PIL
 def test_inline_image(calc, monkeypatch):
     monkeypatch.setattr(config, 'IMAGES_ROOT', os.path.join(config.PROJECT_ROOT, 'tests/files/images'))
 
@@ -45,6 +47,7 @@ def test_inline_image(calc, monkeypatch):
 
 
 @pytest.mark.skipif(sys.platform == 'win32', reason='cur mimetype is defined on windows')
+@needs_PIL
 def test_inline_cursor(calc, monkeypatch):
     monkeypatch.setattr(config, 'IMAGES_ROOT', os.path.join(config.PROJECT_ROOT, 'tests/files/cursors'))
 
diff --git a/scss/tests/functions/test_extra.py b/scss/tests/functions/test_extra.py
index 8940e94..d9f97cb 100644
--- a/scss/tests/functions/test_extra.py
+++ b/scss/tests/functions/test_extra.py
@@ -8,25 +8,30 @@ from __future__ import absolute_import
 from __future__ import unicode_literals
 
 import scss.extension.extra as libextra
+from scss.tests.util import needs_PIL
 from scss.types import Boolean, Color, Number
 
 
 # TODO: currently these all just call the functions and make sure they pass.
 # would be nice to check the output, though that's a little tedious.
 
+@needs_PIL
 def test_background_noise():
     libextra.background_noise(Number(0.5), Number(0.5), Number(100), Boolean(True), color=Color.from_name('green'))
 
 
+@needs_PIL
 def test_background_brushed():
     libextra.background_brushed(Number(0.5), Number(0.5), Color.from_name('red'), Number(0.5))
 
 
+@needs_PIL
 def test_grid_image():
     # TODO this should accept sass values only  :|
     libextra.grid_image(5, 100, 5, 100)
 
 
+@needs_PIL
 def test_image_color():
     libextra.image_color(Color.from_rgb(1, 1, 0))
     assert True
diff --git a/scss/tests/util.py b/scss/tests/util.py
new file mode 100644
index 0000000..8b36d7d
--- /dev/null
+++ b/scss/tests/util.py
@@ -0,0 +1,15 @@
+"""Test utilities."""
+from __future__ import absolute_import
+
+import pytest
+
+try:
+    import PIL
+except ImportError:
+    try:
+        import Image as PIL
+    except ImportError:
+        PIL = None
+
+
+needs_PIL = pytest.mark.skipif(PIL is None, reason='image tests require PIL')