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from __future__ import absolute_import, division, print_function 

import os.path 

import unittest 

import numpy as np 

 

import astshim as ast 

from astshim.test import ObjectTestCase 

 

 

def pad(card): 

"""Pad a string withs paces to length 80 characters""" 

return "%-80s" % (card,) 

 

 

def writeFitsWcs(frameSet, extraOptions=None): 

"""Write a FrameSet as FITS-WCS 

 

extraOptions are in addition to Encoding=Fits-WCS, CDMatrix=1 

""" 

options = "Encoding=FITS-WCS, CDMatrix=1" 

if extraOptions is not None: 

options = "%s, %s" % (options, extraOptions) 

fc = ast.FitsChan(ast.StringStream(), options) 

fc.write(frameSet) 

return fc 

 

 

class TestFitsChan(ObjectTestCase): 

 

def setUp(self): 

self.dataDir = os.path.join(os.path.dirname(__file__), "data") 

shortCards = ( 

"NAXIS1 = 200", 

"NAXIS2 = 200", 

"CTYPE1 = 'RA--TAN '", 

"CTYPE2 = 'DEC-TAN '", 

"CRPIX1 = 100", 

"CRPIX2 = 100", 

"CDELT1 = 0.001", 

"CDELT2 = 0.001", 

"CRVAL1 = 0", 

"CRVAL2 = 0", 

"BOOL = F", 

"UNDEF =", 

"BOOL = T / Repeat", 

"COMMENT one of two comments", 

"COMMENT another of two comments", 

"HISTORY one of two history fields", 

"HISTORY second of three history fields", 

"HISTORY third of three history fields", 

) 

self.cards = [pad(card) for card in shortCards] 

 

def insertPixelMapping(self, mapping, frameSet): 

"""Make a new WCS by inserting a new mapping at the beginnning of the GRID-IWC mapping 

 

Return the new FrameSet (the original is not altered). 

""" 

frameSet = frameSet.copy() 

 

skyFrame = frameSet.getFrame(ast.FrameSet.CURRENT) # use this copy for the new sky frame 

self.assertIsInstance(skyFrame, ast.SkyFrame) 

oldSkyIndex = frameSet.current 

 

if not frameSet.findFrame(ast.Frame(2, "Domain=GRID")): 

raise KeyError("No GRID frame") 

gridIndex = frameSet.current 

 

if not frameSet.findFrame(ast.Frame(2, "Domain=IWC")): 

raise KeyError("No IWC frame") 

oldIwcIndex = frameSet.current 

iwcFrame = frameSet.getFrame(oldIwcIndex) # use this copy for the new IWC frame 

 

oldGridToIwc = frameSet.getMapping(gridIndex, oldIwcIndex) 

iwcToSky = frameSet.getMapping(oldIwcIndex, oldSkyIndex) 

 

# Remove frames in order high to low, so removal doesn't alter the indices remaining to be removed; 

# update gridIndex during removal so it still points to the GRID frame 

framesToRemove = reversed(sorted([oldIwcIndex, oldSkyIndex])) 

for index in framesToRemove: 

if (index < gridIndex): 

gridIndex -= 1 

frameSet.removeFrame(index) 

 

newGridToIwc = mapping.then(oldGridToIwc).simplified() 

frameSet.addFrame(gridIndex, newGridToIwc, iwcFrame) 

frameSet.addFrame(ast.FrameSet.CURRENT, iwcToSky, skyFrame) 

return frameSet 

 

def test_FitsChanAttributes(self): 

"""Test getting and setting FitsChan attributes 

 

Does not test the behavior of the attributes. 

""" 

ss = ast.StringStream("".join(self.cards)) 

fc = ast.FitsChan(ss) 

self.assertFalse(fc.carLin) 

self.assertFalse(fc.cdMatrix) 

self.assertFalse(fc.clean) 

self.assertFalse(fc.defB1950) 

self.assertEqual(fc.encoding, "FITS-WCS") 

self.assertEqual(fc.fitsAxisOrder, "<auto>") 

self.assertAlmostEqual(fc.fitsTol, 0.1) 

self.assertFalse(fc.iwc) 

self.assertTrue(fc.sipOK) 

self.assertTrue(fc.sipReplace) 

self.assertEqual(fc.tabOK, 0) 

self.assertEqual(fc.polyTan, -1) 

warningSet = set(fc.warnings.split(" ")) 

desiredWarningSet = set("BadKeyName BadKeyValue Tnx Zpx BadCel BadMat BadPV BadCTYPE".split(" ")) 

self.assertEqual(warningSet, desiredWarningSet) 

 

fc.carLin = True 

self.assertTrue(fc.carLin) 

fc.cdMatrix = True 

self.assertTrue(fc.cdMatrix) 

fc.clean = True 

self.assertTrue(fc.clean) 

fc.defB1950 = True 

self.assertTrue(fc.defB1950) 

fc.encoding = "NATIVE" 

self.assertEqual(fc.encoding, "NATIVE") 

fc.fitsAxisOrder = "<copy>" 

self.assertEqual(fc.fitsAxisOrder, "<copy>") 

fc.fitsTol = 0.001 

self.assertAlmostEqual(fc.fitsTol, 0.001) 

fc.iwc = True 

self.assertTrue(fc.iwc) 

fc.tabOK = 1 

self.assertEqual(fc.tabOK, 1) 

fc.polyTan = 0 

self.assertEqual(fc.polyTan, 0) 

fc.warnings = "BadKeyName BadMat" 

self.assertEqual(fc.warnings, "BadKeyName BadMat") 

 

def test_FitsChanPreloaded(self): 

"""Test a FitsChan that starts out loaded with data 

""" 

ss = ast.StringStream("".join(self.cards)) 

fc = ast.FitsChan(ss) 

self.assertEqual(fc.nCard, len(self.cards)) 

# there are 2 COMMENT and 3 HISTORY cards, 

# and two BOOL cards so 4 fewer unique keys 

self.assertEqual(fc.nKey, len(self.cards) - 4) 

self.assertEqual(fc.className, "FitsChan") 

fv = fc.getFitsF("CRVAL1") 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, 0.0) 

 

self.assertEqual(fc.encoding, "FITS-WCS") 

 

self.assertEqual(fc.getAllCardNames(), 

[card.split(" ", 1)[0] for card in self.cards]) 

 

def test_FitsChanFileStream(self): 

"""Test a FitsChan with a FileStream 

 

In particular, make sure that cards are written as the channel is destroyed 

""" 

path = os.path.join(self.dataDir, "test_fitsChanFileStream.fits") 

fc1 = ast.FitsChan(ast.FileStream(path, True)) 

fc1.putCards("".join(self.cards)) 

# delete the channel, which writes cards, 

# and then deletes the file stream, closing the file 

del fc1 

 

fc2 = ast.FitsChan(ast.FileStream(path, False)) 

self.assertEqual(fc2.nCard, len(self.cards)) 

del fc2 

os.remove(path) 

 

def test_FitsChanWriteOnDelete(self): 

"""Test that a FitsChan writes cards when it is deleted 

""" 

ss = ast.StringStream() 

fc = ast.FitsChan(ss) 

fc.putCards("".join(self.cards)) 

self.assertEqual(ss.getSinkData(), "") 

del fc 

self.assertEqual(len(ss.getSinkData()), 80 * len(self.cards)) 

 

def test_FitsChanGetFitsSetFits(self): 

"""Test FitsChan.getFits<X>, FitsChan.setFits<X> and getCardType 

""" 

fc = ast.FitsChan(ast.StringStream()) 

self.assertEqual(fc.className, "FitsChan") 

 

# add a card for each type 

complexVal = complex(9.8, -5.15) 

continueVal = "This is a continue card" 

floatVal = 1.5 

intVal = 99 

logicalVal = True 

strVal = "This is a string" 

fc.setFitsCF("ACOMPLEX", complexVal, "Comment for ACOMPLEX") 

commentVal = "This is a comment" 

fc.setFitsCN("ACONT", continueVal, "Comment for ACONT") 

fc.setFitsF("AFLOAT", floatVal, "Comment for AFLOAT") 

fc.setFitsI("ANINT", intVal, "Comment for ANINT") 

fc.setFitsL("ALOGICAL", logicalVal, "Comment for ALOGICAL") 

fc.setFitsS("ASTRING", strVal, "Comment for ASTRING") 

fc.setFitsU("UNDEFVAL", "Comment for UNDEFVAL") 

fc.setFitsCM(commentVal) 

 

self.assertEqual(fc.nCard, 8) 

self.assertEqual(fc.getAllCardNames(), 

["ACOMPLEX", "ACONT", "AFLOAT", "ANINT", 

"ALOGICAL", "ASTRING", "UNDEFVAL", " "]) 

 

fv = fc.getFitsI("ANINT") 

self.assertEqual(fc.getCardType(), ast.CardType.INT) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, intVal) 

self.assertEqual(fc.getCardComm(), "Comment for ANINT") 

self.assertEqual(fc.getCard(), 4) 

 

fv = fc.getFitsS("ANINT") 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, str(intVal)) 

self.assertEqual(fc.getCard(), 4) 

 

fv = fc.getFitsI() # read the current card 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, intVal) 

self.assertEqual(fc.getCard(), 4) 

 

fv = fc.getFitsI("") # alternate way to read the current card 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, intVal) 

self.assertEqual(fc.getCard(), 4) 

 

fv = fc.getFitsF("AFLOAT") 

self.assertEqual(fc.getCardType(), ast.CardType.FLOAT) 

self.assertEqual(fc.getCard(), 3) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, floatVal) 

self.assertEqual(fc.getCardComm(), "Comment for AFLOAT") 

 

fv = fc.getFitsF() # read the current card 

self.assertEqual(fc.getCardType(), ast.CardType.FLOAT) 

self.assertEqual(fc.getCard(), 3) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, floatVal) 

self.assertEqual(fc.getCardComm(), "Comment for AFLOAT") 

 

fv = fc.getFitsCN("ACONT") 

self.assertEqual(fc.getCardType(), ast.CardType.CONTINUE) 

self.assertEqual(fc.getCard(), 2) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, continueVal) 

self.assertEqual(fc.getCardComm(), "Comment for ACONT") 

 

fv = fc.getFitsCN() # read the current card 

self.assertEqual(fc.getCardType(), ast.CardType.CONTINUE) 

self.assertEqual(fc.getCard(), 2) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, continueVal) 

self.assertEqual(fc.getCardComm(), "Comment for ACONT") 

 

fv = fc.getFitsCF("ACOMPLEX") 

self.assertEqual(fc.getCardType(), ast.CardType.COMPLEXF) 

self.assertEqual(fc.getCard(), 1) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, complexVal) 

self.assertEqual(fc.getCardComm(), "Comment for ACOMPLEX") 

 

fv = fc.getFitsCF() # read the current card 

self.assertEqual(fc.getCardType(), ast.CardType.COMPLEXF) 

self.assertEqual(fc.getCard(), 1) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, complexVal) 

self.assertEqual(fc.getCardComm(), "Comment for ACOMPLEX") 

 

fv = fc.getFitsL("ALOGICAL") 

self.assertEqual(fc.getCardType(), ast.CardType.LOGICAL) 

self.assertEqual(fc.getCard(), 5) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, logicalVal) 

self.assertEqual(fc.getCardComm(), "Comment for ALOGICAL") 

 

fv = fc.getFitsL() # read the current card 

self.assertEqual(fc.getCardType(), ast.CardType.LOGICAL) 

self.assertEqual(fc.getCard(), 5) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, logicalVal) 

self.assertEqual(fc.getCardComm(), "Comment for ALOGICAL") 

 

fv = fc.getFitsS("ASTRING") 

self.assertEqual(fc.getCardType(), ast.CardType.STRING) 

self.assertEqual(fc.getCard(), 6) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, strVal) 

self.assertEqual(fc.getCardComm(), "Comment for ASTRING") 

 

fv = fc.getFitsS() # read the current card 

self.assertEqual(fc.getCardType(), ast.CardType.STRING) 

self.assertEqual(fc.getCard(), 6) 

self.assertTrue(fv.found) 

self.assertAlmostEqual(fv.value, strVal) 

self.assertEqual(fc.getCardComm(), "Comment for ASTRING") 

 

fv = fc.getFitsS("BADNAME") # a card that does not exist 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

self.assertFalse(fv.found) 

 

fc.setCard(7) 

self.assertEqual(fc.getCardType(), ast.CardType.UNDEF) 

with self.assertRaises(RuntimeError): 

fc.getFitsS() 

self.assertEqual(fc.getCardComm(), "Comment for UNDEFVAL") 

 

fc.setCard(8) 

self.assertEqual(fc.getCardType(), ast.CardType.COMMENT) 

with self.assertRaises(RuntimeError): 

fc.getFitsS() 

self.assertEqual(fc.getCardComm(), commentVal) 

 

# replace ANINT card with new everything: name, value type and comment 

fc.setCard(4) 

fc.setFitsCF("NEWNAME", complex(99.9, 99.8), "New comment", overwrite=True) 

self.assertEqual(fc.getAllCardNames(), 

["ACOMPLEX", "ACONT", "AFLOAT", "NEWNAME", 

"ALOGICAL", "ASTRING", "UNDEFVAL", " "]) 

fc.setCard(1) # force a search 

fv = fc.getFitsCF("NEWNAME") 

self.assertTrue(fv.found) 

self.assertEqual(fv.value.real, 99.9) 

self.assertEqual(fv.value.imag, 99.8) 

self.assertEqual(fc.getCardComm(), "New comment") 

self.assertEqual(fc.getCard(), 4) 

 

def test_FitsChanGetCurrentForNonexistentCard(self): 

"""Test getting info on the current card when it does not exist 

""" 

fc = ast.FitsChan(ast.StringStream()) 

fc.setFitsI("ANINT", 200) 

fc.setFitsS("ASTRING", "string value") 

fc.setCard(fc.nCard + 1) 

self.assertEqual(fc.getCardType(), ast.NOTYPE) 

self.assertEqual(fc.testFits(), ast.ABSENT) 

with self.assertRaises(RuntimeError): 

fc.getFitsCN() 

with self.assertRaises(RuntimeError): 

fc.getFitsF() 

with self.assertRaises(RuntimeError): 

fc.getFitsI() 

with self.assertRaises(RuntimeError): 

fc.getFitsL() 

with self.assertRaises(RuntimeError): 

fc.getFitsS() 

with self.assertRaises(RuntimeError): 

fc.getFitsCF() 

self.assertEqual(fc.getCardName(), "") 

self.assertEqual(fc.getCardComm(), "") 

 

def test_FitsChanGetFitsMissing(self): 

"""Test FitsChan.getFits<X> for missing cards, with and without defaults 

""" 

fc = ast.FitsChan(ast.StringStream()) 

fc.setFitsI("ANINT", 200) 

fc.setFitsS("ASTRING", "string value") 

 

self.assertEqual(fc.nCard, 2) 

 

# test getFitsX for missing cards with default values 

fv = fc.getFitsCF("BOGUS", complex(9, -5)) 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, complex(9, -5)) 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsCN("BOGUS", "not_there") 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, "not_there") 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsF("BOGUS", 55.5) 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, 55.5) 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsI("BOGUS", 55) 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, 55) 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsL("BOGUS", True) 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, True) 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsS("BOGUS", "missing") 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, "missing") 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

# test getFitsX for missing cards without default values 

fv = fc.getFitsCF("BOGUS") 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, complex()) 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsCN("BOGUS") 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, "") 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsF("BOGUS") 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, 0) 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsI("BOGUS") 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, 0) 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsL("BOGUS") 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, False) 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.getFitsS("BOGUS") 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, "") 

self.assertEqual(fc.getCardType(), ast.CardType.NOTYPE) 

self.assertEqual(fc.getCard(), fc.nCard + 1) 

 

fv = fc.findFits("BOGUS", inc=False) 

self.assertFalse(fv.found) 

self.assertEqual(fv.value, "") 

 

def test_FitsChanEmptyFits(self): 

ss = ast.StringStream("".join(self.cards)) 

fc = ast.FitsChan(ss) 

self.assertEqual(fc.nCard, len(self.cards)) 

fc.emptyFits() 

self.assertEqual(fc.nCard, 0) 

 

def test_FitsChanPutCardsPutFits(self): 

ss = ast.StringStream() 

fc = ast.FitsChan(ss) 

cards = "CRVAL1 = 0 " + \ 

"CRVAL2 = 0 " 

fc.putCards(cards) 

self.assertEqual(fc.getCard(), 1) 

fc.setCard(100) # past the end = end of cards 

self.assertEqual(fc.getCard(), 3) 

fc.clearCard() 

self.assertEqual(fc.getCard(), 1) 

self.assertEqual(fc.getAllCardNames(), ["CRVAL1", "CRVAL2"]) 

 

# insert new cards at the beginning 

for card in self.cards[0:8]: 

fc.putFits(card, overwrite=False) 

self.assertEqual(fc.nCard, 10) 

self.assertEqual(fc.getCard(), 9) 

predCardNames = [c.split()[0] for c in self.cards[0:8]] + ["CRVAL1", "CRVAL2"] 

self.assertEqual(fc.getAllCardNames(), predCardNames) 

 

def test_FitsChanFindFits(self): 

ss = ast.StringStream("".join(self.cards)) 

fc = ast.FitsChan(ss) 

expectedNCards = fc.nCard 

 

# append a card with no value 

fc.setCard(fc.nCard + 1) 

fc.setFitsU("UNDEFVAL") 

expectedNCards += 1 

self.assertEqual(fc.nCard, expectedNCards) 

 

fc.setCard(9) # index of CRVAL1 

self.assertEqual(fc.getCardName(), "CRVAL1") 

fv = fc.findFits("%f", inc=False) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CRVAL1 = 0")) 

 

# delete CRVAL1 card 

fc.delFits() 

expectedNCards -= 1 

self.assertEqual(fc.nCard, expectedNCards) 

self.assertEqual(fc.getCard(), 9) 

fv = fc.findFits("%f", inc=False) 

self.assertEqual(fc.getCard(), 9) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CRVAL2 = 0")) 

 

# insert CRVAL1 card before current card; verify that the index 

# is incremented to point to the next card 

fc.putFits("CRVAL1 = 99", overwrite=False) 

expectedNCards += 1 

self.assertEqual(fc.nCard, expectedNCards) 

self.assertEqual(fc.getCard(), 10) 

fv = fc.findFits("%f", inc=False) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CRVAL2 = 0")) 

 

fc.setCard(9) # index of CRVAL1 

fv = fc.findFits("%f", inc=False) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CRVAL1 = 99")) 

 

# overwrite CRVAL1 card 

fc.setCard(9) 

fc.putFits("CRVAL1 = 0", overwrite=True) 

self.assertEqual(fc.nCard, expectedNCards) 

fc.setCard(9) 

fv = fc.findFits("%f", inc=False) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CRVAL1 = 0")) 

 

# test that findFits does not wrap around 

fv = fc.findFits("CTYPE2", inc=False) 

self.assertFalse(fv.found) 

fc.clearCard() 

fv = fc.findFits("CTYPE2", inc=False) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CTYPE2 = 'DEC-TAN '")) 

self.assertEqual(fc.getCard(), 4) 

 

# test that we can find a card with undefined value 

fc.clearCard() 

fv = fc.findFits("UNDEFVAL", inc=False) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, 

"UNDEFVAL= ") 

 

def test_FitsChanReadWrite(self): 

ss = ast.StringStream("".join(self.cards)) 

fc1 = ast.FitsChan(ss) 

obj1 = fc1.read() 

self.assertEqual(obj1.className, "FrameSet") 

 

ss2 = ast.StringStream() 

fc2 = ast.FitsChan(ss2, "Encoding=FITS-WCS") 

n = fc2.write(obj1) 

self.assertEqual(n, 1) 

self.assertEqual(fc2.nCard, 10) 

fc2.clearCard() 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("WCSAXES = 2 / Number of WCS axes")) 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CRPIX1 = 100.0 / Reference pixel on axis 1")) 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CRPIX2 = 100.0 / Reference pixel on axis 2")) 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CRVAL1 = 0.0 / Value at ref. pixel on axis 1")) 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CRVAL2 = 0.0 / Value at ref. pixel on axis 2")) 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CTYPE1 = 'RA---TAN' / Type of co-ordinate on axis 1")) 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CTYPE2 = 'DEC--TAN' / Type of co-ordinate on axis 2")) 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CDELT1 = 0.001 / Pixel size on axis 1")) 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("CDELT2 = 0.001 / Pixel size on axis 2")) 

 

fv = fc2.findFits("%f", inc=True) 

self.assertTrue(fv.found) 

self.assertEqual(fv.value, pad("RADESYS = 'ICRS ' / Reference frame for RA/DEC values")) 

 

self.assertEqual(ss2.getSinkData(), "") 

self.assertEqual(fc2.nCard, 10) 

fc2.writeFits() 

self.assertEqual(fc2.nCard, 0) 

a = ss2.getSinkData() 

 

ss3 = ast.StringStream(ss2.getSinkData()) 

fc3 = ast.FitsChan(ss3, "Encoding=FITS-WCS") 

fc3.readFits() 

obj3 = fc3.read() 

 

ss4 = ast.StringStream() 

fc4 = ast.FitsChan(ss4, "Encoding=FITS-WCS") 

n = fc4.write(obj3) 

self.assertEqual(n, 1) 

del fc4 

b = ss4.getSinkData() 

self.assertEqual(a, b) 

 

def test_FitsChanTestFits(self): 

fc = ast.FitsChan(ast.StringStream()) 

self.assertEqual(fc.className, "FitsChan") 

 

# add a card for each type 

fc.setFitsF("AFLOAT", 1.5) 

fc.setFitsS("ASTRING", "a string") 

fc.setFitsU("UNDEFVAL") 

 

self.assertEqual(fc.testFits("AFLOAT"), ast.PRESENT) 

self.assertEqual(fc.testFits("ASTRING"), ast.PRESENT) 

self.assertEqual(fc.testFits("UNDEFVAL"), ast.NOVALUE) 

self.assertEqual(fc.testFits("BADNAME"), ast.ABSENT) 

 

fc.setCard(1) 

self.assertEqual(fc.getCardName(), "AFLOAT") 

self.assertEqual(fc.testFits(), ast.PRESENT) 

fc.setCard(3) 

self.assertEqual(fc.getCardName(), "UNDEFVAL") 

self.assertEqual(fc.testFits(), ast.NOVALUE) 

 

def test_FitsChanInsertShift(self): 

"""Check that a simple WCS can still be written as FITS-WCS 

after inserting a shift at the beginning of GRID to IWC 

 

This tests LSST ticket DM-12524 

""" 

ss = ast.StringStream("".join(self.cards)) 

fc = ast.FitsChan(ss, "Encoding=FITS-WCS, IWC=1") 

frameSet = fc.read() 

self.assertIsInstance(frameSet, ast.FrameSet) 

self.assertAlmostEqual(fc.fitsTol, 0.1) 

 

shift = 30 

shiftMap = ast.ShiftMap([shift, shift]) 

shiftedFrameSet = self.insertPixelMapping(shiftMap, frameSet) 

 

fc2 = writeFitsWcs(frameSet) 

self.assertGreater(fc2.nCard, 9) 

for i in (1, 2): 

fv = fc2.getFitsF("CRPIX%d" % (i,)) 

self.assertAlmostEqual(fv.value, 100) 

 

fc3 = writeFitsWcs(shiftedFrameSet) 

self.assertGreaterEqual(fc3.nCard, fc2.nCard) 

for i in (1, 2): 

fv = fc3.getFitsF("CRPIX%d" % (i,)) 

self.assertAlmostEqual(fv.value, 100 - shift) 

for name in fc2.getAllCardNames(): 

self.assertEqual(fc3.testFits(name), ast.PRESENT) 

 

def test_FitsChanFitsTol(self): 

"""Test that increasing FitsTol allows writing a WCS with distortion as FITS-WCS 

""" 

ss = ast.StringStream("".join(self.cards)) 

fc = ast.FitsChan(ss, "Encoding=FITS-WCS, IWC=1") 

frameSet = fc.read() 

 

distortion = ast.PcdMap(0.001, [0.0, 0.0]) 

distortedFrameSet = self.insertPixelMapping(distortion, frameSet) 

 

# Writing as FTIS-WCS should fail with the default FitsTol 

fc = writeFitsWcs(distortedFrameSet) 

self.assertEqual(fc.nCard, 0) 

 

# Writing as FITS-WCS should succeed with adequate FitsTol 

fc2 = writeFitsWcs(distortedFrameSet, "FitsTol=1000") 

self.assertGreater(fc2.nCard, 9) 

for i in (1, 2): 

fv = fc2.getFitsF("CRVAL%d" % (i,)) 

self.assertAlmostEqual(fv.value, 0) 

fv2 = fc2.getFitsS("CTYPE1") 

self.assertEqual(fv2.value, "RA---TAN") 

fv3 = fc2.getFitsS("CTYPE2") 

self.assertEqual(fv3.value, "DEC--TAN") 

 

def test_FitsChanDM13686(self): 

"""Test that a particular FrameSet will not segfault when 

we attempt to write it to a FitsChan as FITS-WCS 

""" 

def readObjectFromShow(path): 

"""Read an ast object saved as Object.show()""" 

with open(path, "r") as f: 

objectText = f.read() 

stream = ast.StringStream(objectText) 

chan = ast.Channel(stream) 

return chan.read() 

 

path = os.path.join(self.dataDir, "frameSetDM13686.txt") 

frameSet = readObjectFromShow(path) 

strStream = ast.StringStream() 

fitsChan = ast.FitsChan(strStream, "Encoding=FITS-WCS") 

# This FrameSet can be represtented as FITS-WCS, so 1 object is written 

self.assertEqual(fitsChan.write(frameSet), 1) 

 

def test_FitsChanTAB(self): 

"""Test that FITS -TAB WCS can be created. 

""" 

 

wavelength = np.array([0., 0.5, 1.5, 3., 5.]) 

 

# Create a FrameSet using a LutMap with non-linear coordinates 

pixelFrame = ast.Frame(1, "Domain=PIXELS") 

wavelengthFrame = ast.SpecFrame("System=wave, unit=nm") 

lutMap = ast.LutMap(wavelength, 1, 1) 

frameSet = ast.FrameDict(pixelFrame) 

frameSet.addFrame("PIXELS", lutMap, wavelengthFrame) 

 

# Now serialize it using -TAB WCS 

fc = writeFitsWcs(frameSet, "TabOk=1") 

 

fv = fc.getFitsS("CTYPE1") 

self.assertEqual(fv.value, "WAVE-TAB") 

 

# PS1_0 is the table extension name 

fv = fc.getFitsS("PS1_0") 

waveext = fv.value 

self.assertEqual(waveext, "WCS-TAB") 

 

# PS1_1 is the column name for the wavelength 

fv = fc.getFitsS("PS1_1") 

wavecol = fv.value 

self.assertEqual(wavecol, "COORDS1") 

 

# Get the WCS table from the FitsChan 

km = fc.getTables() 

table = km.getA(waveext, 0) 

fc_bintab = table.getTableHeader() 

 

fv = fc_bintab.getFitsS("TDIM1") 

self.assertEqual(fv.value, "(1,5)") 

 

self.assertEqual(table.nRow, 1) 

self.assertEqual(table.nColumn, 1) 

 

# 1-based column numbering to match FITS 

cname = table.columnName(1) 

self.assertEqual(cname, "COORDS1") 

self.assertEqual(table.columnType(cname), ast.DataType.DoubleType) 

self.assertEqual(table.columnSize(cname), 40) 

self.assertEqual(table.columnNdim(cname), 2) 

self.assertEqual(table.columnUnit(cname), "nm") 

self.assertEqual(table.columnLength(cname), 5) 

self.assertEqual(table.columnShape(cname), [1, 5]) 

coldata = table.getColumnData1D(cname) 

self.assertEqual(list(coldata), list(wavelength)) 

 

# This will be shaped correctly as a numpy array with third dimension 

# the row count. 

coldata = table.getColumnData(cname) 

self.assertEqual(coldata.ndim, 3) 

self.assertEqual(coldata.shape, (1, 5, 1)) 

 

def test_python(self): 

"""Test Python Mapping/Sequence interface to FitsChan. 

""" 

ss = ast.StringStream("".join(self.cards)) 

fc = ast.FitsChan(ss) 

self.assertEqual(len(fc), 18) 

cards = "".join(c for c in fc) 

 

self.assertEqual(cards, "".join(self.cards)) 

self.assertIn("CTYPE2", fc) 

self.assertIn(10, fc) 

self.assertNotIn(-1, fc) 

self.assertNotIn(20, fc) 

self.assertNotIn("CTYPE3", fc) 

 

self.assertEqual(fc["CTYPE1"], "RA--TAN") 

self.assertEqual(fc["NAXIS2"], 200) 

self.assertEqual(fc["CDELT2"], 0.001) 

self.assertFalse(fc["BOOL"]) 

self.assertEqual(fc[4].rstrip(), "CRPIX1 = 100") 

with self.assertRaises(KeyError): 

fc["NOTIN"] 

with self.assertRaises(IndexError): 

fc[100] 

 

# Update values 

fc["BOOL"] = True # This will remove second card 

self.assertEqual(fc["BOOL"], True) 

fc["CRVAL2"] = None 

self.assertIsNone(fc["CRVAL2"]) 

fc["NEWSTR"] = "Test" 

self.assertEqual(fc["NEWSTR"], "Test") 

fc["NEWINT"] = 1024 

self.assertEqual(fc["NEWINT"], 1024) 

fc["NEWFLT"] = 3.5 

self.assertEqual(fc["NEWFLT"], 3.5) 

fc["UNDEF"] = "not undef" 

self.assertEqual(fc["UNDEF"], "not undef") 

 

fc[""] = "A new BLANK comment" 

fc[0] = "COMMENT Introduction comment" 

self.assertEqual(fc[0].rstrip(), "COMMENT Introduction comment") 

 

# This will fail since a string is required 

with self.assertRaises(TypeError): 

fc[0] = 52 

 

# Delete the 3rd card 

del fc[2] 

self.assertEqual(fc[2].rstrip(), "CTYPE2 = 'DEC-TAN '") 

self.assertEqual(len(fc), 20) 

 

# Delete all the HISTORY cards 

del fc["HISTORY"] 

self.assertEqual(len(fc), 17) 

 

# Change a card to blank 

fc[3] = None 

self.assertEqual(fc[3].strip(), "") 

fc[3] = "COMMENT 1" 

self.assertEqual(fc[3].strip(), "COMMENT 1") 

fc[3] = "" 

self.assertEqual(fc[3].strip(), "") 

 

# Use negative index 

self.assertEqual(fc[-1], fc[fc.nCard-1]) 

fc[-2] = "COMMENT new comment" 

self.assertEqual(fc[-2], fc[fc.nCard-2]) 

self.assertEqual(fc[-2].rstrip(), "COMMENT new comment") 

 

# Append a comment to the end 

nCards = len(fc) 

fc[fc.nCard] = "COMMENT X" 

self.assertEqual(len(fc), nCards + 1) 

self.assertEqual(fc[-1].rstrip(), "COMMENT X") 

 

# Try to access and append using a high index 

with self.assertRaises(IndexError): 

fc[fc.nCard + 1] 

with self.assertRaises(IndexError): 

fc[fc.nCard + 1] = "" 

with self.assertRaises(IndexError): 

fc[fc.nCard] 

 

# Or the wrong type of key 

with self.assertRaises(KeyError): 

fc[3.14] = 52 

 

# Delete final card 

nCards = len(fc) 

del fc[-1] 

self.assertEqual(fc[-1].rstrip(), "NEWFLT = 3.5") 

self.assertEqual(len(fc), nCards - 1) 

 

with self.assertRaises(IndexError): 

del fc[-fc.nCard - 1] 

 

with self.assertRaises(IndexError): 

del fc[fc.nCard] 

 

with self.assertRaises(KeyError): 

del fc[3.14] 

 

with self.assertRaises(KeyError): 

del fc["NOTTHERE"] 

 

# Test stringification 

header = str(fc) 

self.assertIn("BOOL = 1", header) 

 

# All the items 

collected = [] 

for k, v in fc.items(): 

collected.append((k, v)) 

self.assertEqual(len(collected), len(fc)) 

 

 

881 ↛ 882line 881 didn't jump to line 882, because the condition on line 881 was never trueif __name__ == "__main__": 

unittest.main()