tests/test_gamera: add test for to_pil_rgb().

tests/coverage.txt

@@ -7,7 +7,7 @@ lib.cli                     228     62     94     45    67%   102-119, 261-285,
 lib.djvu_support            257    120     89     52    50%   48-50, 85, 112, 115, 124, 144-166, 170-173, 176-178, 182-185, 189, 195-203, 206-220, 224, 226, 228, 230, 232, 238-239, 248-249, 252, 254, 257, 270-310, 313-321
 lib.filetype                 18      0      4      1    95%
 lib.fs                       14      0      2      0   100%
-lib.gamera_support          134      4     44      2    97%   205-207, 210
+lib.gamera_support          134      1     44      2    98%   210
 lib.ipc                      79      1     32      6    94%   106
 lib.templates                40      0     14      0   100%
 lib.temporary                20      0      0      0   100%
@@ -19,4 +19,4 @@ lib.xmp.libxmp_backend       66      4     20      2    93%   51-54
 lib.xmp.namespaces            6      0      0      0   100%
 lib.xmp.pyexiv2_backend     119      2     20      1    98%   124-125
 ---------------------------------------------------------------------
-TOTAL                      1099    193    337    110    79%
+TOTAL                      1099    190    337    110    79%

tests/test_gamera.py

@@ -17,11 +17,14 @@
 
 from . common import (
     assert_equal,
+    assert_images_equal,
     assert_is_instance,
     assert_is_none,
     fork_isolation,
 )
 
+from PIL import Image as pil
+
 from lib import gamera_support as gamera
 
 datadir = os.path.join(os.path.dirname(__file__), 'data')
@@ -78,4 +81,25 @@ def test_grey(self):
         for x in self._test_methods('greyscale-packbits.tiff'):
             yield x
 
+class test_to_pil_rgb():
+
+    @fork_isolation
+    def _test(self, path):
+        path = os.path.join(datadir, path)
+        in_image = pil.open(path)
+        if in_image.mode != 'RGB':
+            in_image = in_image.convert('RGB')
+        assert_equal(in_image.mode, 'RGB')
+        gamera.init()
+        gamera_image = gamera.load_image(path)
+        out_image = gamera.to_pil_rgb(gamera_image)
+        assert_equal(out_image.mode, 'RGB')
+        assert_images_equal(in_image, out_image)
+
+    def test_color(self):
+        self._test('ycbcr-jpeg.tiff')
+
+    def test_grey(self):
+        self._test('greyscale-packbits.tiff')
+
 # vim:ts=4 sts=4 sw=4 et