add a test case for radio cubes

CHANGES.rst

@@ -51,6 +51,8 @@ Other Changes and Additions
 
 - Astropy 1.0 is now required.
 
+- Shape conversion for multi-dimenstional HDU does not raise exceptions.
+
 - Parser supports hex color in attributes
 
 1.2 (Aug 11, 2016)

pyregion/tests/data/sample_fits04.header

@@ -0,0 +1,22 @@
+SIMPLE  =                    T /
+BITPIX  =                  -32 /
+NAXIS   =                    3 /
+NAXIS1  =                  256 /
+NAXIS2  =                  256 /
+NAXIS3  =                   63 /
+EQUINOX =      2.000000000E+03 /Epoch of RA DEC
+CTYPE1  = 'RA---SIN'           /
+CRVAL1  =    1.81046666667E+02 /
+CDELT1  =     -1.388888923E-03 /
+CRPIX1  =      1.280000000E+02 /
+CROTA1  =      0.000000000E+00 /
+CTYPE2  = 'DEC--SIN'           /
+CRVAL2  =    1.84433333333E+01 /
+CDELT2  =      1.388888923E-03 /
+CRPIX2  =      1.290000000E+02 /
+CROTA2  =      0.000000000E+00 /
+CTYPE3  = 'FREQ    '           /
+CRVAL3  =    1.41604138193E+09 /
+CDELT3  =      4.882812500E+04 /
+CRPIX3  =      3.200000000E+01 /
+CROTA3  =      0.000000000E+00 /

pyregion/tests/test_cube.py

@@ -0,0 +1,21 @@
+import os
+from os.path import join
+from astropy.io.fits import Header
+from .. import parse
+from numpy.testing import assert_allclose
+
+rootdir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'data')
+
+
+def demo_header():
+    return Header.fromtextfile(join(rootdir, "sample_fits04.header"))
+
+
+def test_cube():
+
+    header = demo_header()
+
+    region_string = 'circle(12:04:15.065,+18:26:51.00,173.029")'
+    r = parse(region_string).as_imagecoord(header)
+
+    assert_allclose(r[0].coord_list, [117, 132, 34.6], atol=0.01)