lim cleaned up SkyLine and added a test

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/branches/sphere@17217 fe389314-cf27-0410-b35b-8c050e845b92

Former-commit-id: 5673edaa81bee2b373f91d5e22336cd696a0584e

1 files changed, 34 insertions, 0 deletions

diff --git a/lib/test/test_skyline.py b/lib/test/test_skyline.py
new file mode 100644
index 0000000..d450e49
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+++ b/lib/test/test_skyline.py
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+"""SkyLine tests.
+
+:Author: Pey Lian Lim
+
+:Organization: Space Telescope Science Institute
+
+"""
+from __future__ import absolute_import
+
+import pyfits
+from numpy.testing import assert_almost_equal, assert_array_less
+
+from .. import skyline
+
+from .test_util import ROOT_DIR
+from .test_shared import resolve_imagename
+
+def test_union_simple():
+    # Two similar exposures with slight offset and some rotation.
+    im1 = resolve_imagename(ROOT_DIR, '2chipA.fits')
+    im2 = resolve_imagename(ROOT_DIR, '2chipB.fits')
+    
+    skyline1 = skyline.SkyLine(im1)
+    skyline2 = skyline.SkyLine(im2)
+    
+    union_1_2 = skyline1.union(skyline2)
+    union_2_1 = skyline2.union(skyline1)
+
+    assert_almost_equal(union_1_2.area(), union_2_1.area())
+
+    for m in union_1_2.members:
+        assert m in union_2_1.members
+
+    assert len(union_1_2.members) == 4