test_GFits.py
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# ==========================================================================
# This module performs unit tests for the GammaLib FITS module.
#
# Copyright (C) 2012-2015 Juergen Knoedlseder
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# ==========================================================================
import math
import os
import sys
import gammalib
# =================================== #
# Test class for GammaLib FITS module #
# =================================== #
class Test(gammalib.GPythonTestSuite):
"""
Test class for GammaLib FITS module.
"""
def __init__(self):
"""
Constructor.
"""
# Call base class constructor
gammalib.GPythonTestSuite.__init__(self)
# Return
return
def set(self):
"""
Set all test functions.
"""
# Set test name
self.name("fits")
# Append tests
self.append(self.test_fits, "Test GFits")
# Return
return
def test_fits(self):
"""
Test FITS interface.
"""
# Set filenames
file1 = "test_python_fits_v1.fits"
file2 = "test_python_fits_v2.fits"
# Remove test files
try:
os.remove(file1)
os.remove(file2)
except:
pass
# Create FITS file
fits = gammalib.GFits(file1, True)
sys.stdout.write(".")
# Create images
nx = 10
ny = 10
img1 = gammalib.GFitsImageByte(nx, ny)
img2 = gammalib.GFitsImageDouble(nx, ny)
img3 = gammalib.GFitsImageFloat(nx, ny)
img4 = gammalib.GFitsImageLong(nx, ny)
img5 = gammalib.GFitsImageLongLong(nx, ny)
img6 = gammalib.GFitsImageSByte(nx, ny)
img7 = gammalib.GFitsImageShort(nx, ny)
img8 = gammalib.GFitsImageULong(nx, ny)
img9 = gammalib.GFitsImageUShort(nx, ny)
for x in range(nx):
for y in range(ny):
img1[x, y] = x + y * nx
img2[x, y] = x + y * nx
img3[x, y] = x + y * nx
img4[x, y] = x + y * nx
img5[x, y] = x + y * nx
img6[x, y] = x + y * nx
img7[x, y] = x + y * nx
img8[x, y] = x + y * nx
img9[x, y] = x + y * nx
img1.extname("Byte")
img2.extname("Double")
img3.extname("Float")
img4.extname("Long")
img5.extname("LongLong")
img6.extname("SByte")
img7.extname("Short")
img8.extname("ULong")
img9.extname("UShort")
sys.stdout.write(".")
# Append images to FITS file
fits.append(img1)
fits.append(img2)
fits.append(img3)
fits.append(img4)
fits.append(img5)
# fits.append(img6) # Not supported in older cfitsio
fits.append(img7)
fits.append(img8)
fits.append(img9)
sys.stdout.write(".")
# Set header keywords
img_byte = fits.image(0)
img_byte.card("test", "test-value", "this is for testing")
img_byte.card("real", 3.1415, "a real value")
img_byte.card("int", 41, "an integer value")
sys.stdout.write(".")
# Create table columns
nrows = 10
col1 = gammalib.GFitsTableBitCol("BIT", nrows)
col2 = gammalib.GFitsTableBoolCol("BOOLEAN", nrows)
col3 = gammalib.GFitsTableByteCol("BYTE", nrows)
col4 = gammalib.GFitsTableDoubleCol("DOUBLE", nrows)
col5 = gammalib.GFitsTableFloatCol("FLOAT", nrows)
col6 = gammalib.GFitsTableLongCol("LONG", nrows)
col7 = gammalib.GFitsTableLongLongCol("LONGLONG", nrows)
col8 = gammalib.GFitsTableShortCol("SHORT", nrows)
col9 = gammalib.GFitsTableStringCol("STRING", nrows, 20)
col10 = gammalib.GFitsTableULongCol("ULONG", nrows)
col11 = gammalib.GFitsTableUShortCol("USHORT", nrows)
for i in range(nrows):
#col1[i] = i % 2 # Old swig version
#col2[i] = i % 2 # Old swig version
col1[i] = bool(i % 2) # New swig version (3.x.y)
col2[i] = bool(i % 2) # New swig version (3.x.y)
col3[i] = i
col4[i] = i * 0.01
col5[i] = i * 0.01
col6[i] = i * 100
col7[i] = i * 10000
col8[i] = i * 100
col9[i] = str(i * 100)
col10[i] = i * 100
col11[i] = i * 100
sys.stdout.write(".")
# Set ASCII table
tbl_ascii = gammalib.GFitsAsciiTable()
# tbl_ascii.append(col1) # Need to implement ?/!
# tbl_ascii.append(col2) # Need to implement ?/!
tbl_ascii.append(col3)
tbl_ascii.append(col4)
tbl_ascii.append(col5)
tbl_ascii.append(col6)
tbl_ascii.append(col7)
tbl_ascii.append(col8)
tbl_ascii.append(col9)
tbl_ascii.append(col10)
tbl_ascii.append(col11)
tbl_ascii.extname("ASCII table")
fits.append(tbl_ascii)
sys.stdout.write(".")
# Set binary table
tbl_bin = gammalib.GFitsBinTable()
tbl_bin.append(col1)
tbl_bin.append(col2)
tbl_bin.append(col3)
tbl_bin.append(col4)
tbl_bin.append(col5)
tbl_bin.append(col6)
tbl_bin.append(col7)
tbl_bin.append(col8)
tbl_bin.append(col9)
tbl_bin.append(col10)
tbl_bin.append(col11)
tbl_bin.extname("Binary table")
fits.append(tbl_bin)
sys.stdout.write(".")
# Save FITS file
# sys.stdout.write(fits+"\n")
fits.save()
sys.stdout.write(".")
# Close FITS file
fits.close()
sys.stdout.write(".")
# Re-open FITS file
fits = gammalib.GFits(file1)
sys.stdout.write(".")
# Get double precision image, take square root of pixel and save in
# another file
img_double = fits.image("Double")
for x in range(nx):
for y in range(ny):
img_double[x, y] = math.sqrt(img_double[x, y])
sys.stdout.write(".")
# Save into another FITS file
fits.saveto(file2)
sys.stdout.write(".")
# Close FITS file
fits.close()
sys.stdout.write(".")
# Return
return