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-rw-r--r--stwcs/tests/test_hstwcs.py15
1 files changed, 15 insertions, 0 deletions
diff --git a/stwcs/tests/test_hstwcs.py b/stwcs/tests/test_hstwcs.py
new file mode 100644
index 0000000..8a4a9ba
--- /dev/null
+++ b/stwcs/tests/test_hstwcs.py
@@ -0,0 +1,15 @@
+from __future__ import absolute_import, division, print_function
+from astropy.io import fits
+from ..wcsutil import hstwcs
+
+
+def test_radesys():
+ phdr = fits.PrimaryHDU().header
+ phdr['refframe'] = 'icrs'
+ assert hstwcs.determine_refframe(phdr) == 'ICRS'
+ phdr['refframe'] = 'gsc1'
+ assert hstwcs.determine_refframe(phdr) == 'FK5'
+ phdr['refframe'] = 'other'
+ assert hstwcs.determine_refframe(phdr) is None
+ phdr['refframe'] = ' '
+ assert hstwcs.determine_refframe(phdr) is None