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from __future__ import absolute_import, division, print_function 

import unittest 

from numpy.testing import assert_allclose 

 

from astshim import Frame, SkyFrame, UnitMap, FrameSet, append 

from astshim.test import makeForwardPolyMap, makeTwoWayPolyMap 

 

 

class TestFrameSetAppend(unittest.TestCase): 

 

def makeFrameSet(self, nIn, nOut): 

"""Create a FrameSet with the specified dimensions. 

 

The FrameSet shall have the following Frames: 

"base"(nIn, #1) 

| 

+-------------- 

| | 

"mid"(4, #2) "fork"(1, #4) 

| 

"current"(nOut, #3) 

""" 

frameSet = FrameSet(Frame(nIn, "Ident=base")) 

frameSet.addFrame(FrameSet.CURRENT, 

makeTwoWayPolyMap(nIn, 4), 

Frame(4, "Ident=mid")) 

frameSet.addFrame(FrameSet.CURRENT, 

makeTwoWayPolyMap(4, nOut), 

Frame(nOut, "Ident=current")) 

frameSet.addFrame(FrameSet.BASE, 

makeTwoWayPolyMap(nIn, 1), 

Frame(1, "Ident=fork")) 

 

frameSet.current = 3 

assert frameSet.nFrame == 4 

assert frameSet.base == 1 

assert frameSet.getFrame(FrameSet.BASE).ident == "base" 

assert frameSet.getFrame(2).ident == "mid" 

assert frameSet.current == 3 

assert frameSet.getFrame(FrameSet.CURRENT).ident == "current" 

assert frameSet.getFrame(4).ident == "fork" 

return frameSet 

 

def test_AppendEffect(self): 

"""Check that a concatenated FrameSet transforms correctly. 

""" 

set1 = self.makeFrameSet(2, 3) 

set2 = self.makeFrameSet(3, 1) 

set12 = append(set1, set2) 

 

# Can't match 1D output to 2D input 

with self.assertRaises(RuntimeError): 

append(set2, set1) 

 

x = [1.2, 3.4] 

y_merged = set12.applyForward(x) 

y_separate = set2.applyForward(set1.applyForward(x)) 

assert_allclose(y_merged, y_separate) 

 

y = [-0.3] 

x_merged = set12.applyInverse(y) 

x_separate = set1.applyInverse(set2.applyInverse(y)) 

assert_allclose(x_merged, x_separate) 

 

# No side effects 

self.assertEqual(set1.base, 1) 

self.assertEqual(set1.current, 3) 

self.assertEqual(set2.base, 1) 

self.assertEqual(set2.current, 3) 

 

def test_AppendFrames(self): 

"""Check that a concatenated FrameSet preserves all Frames. 

""" 

set1 = self.makeFrameSet(1, 3) 

# AST docs say FrameSets always have contiguously numbered frames, 

# but let's make sure 

set1.removeFrame(2) 

set2 = self.makeFrameSet(3, 2) 

set12 = append(set1, set2) 

 

self.assertEqual(set1.nFrame + set2.nFrame, set12.nFrame) 

for i in range(1, 1+set1.nFrame): 

oldFrame = set1.getFrame(i) 

newFrame = set12.getFrame(i) 

self.assertEqual(oldFrame.ident, newFrame.ident) 

self.assertEqual(oldFrame.nAxes, newFrame.nAxes) 

if i == set1.base: 

self.assertTrue(i == set12.base) 

else: 

self.assertFalse(i == set12.base) 

for i in range(1, 1+set2.nFrame): 

offset = set1.nFrame 

oldFrame = set2.getFrame(i) 

newFrame = set12.getFrame(offset + i) 

self.assertEqual(oldFrame.ident, newFrame.ident) 

self.assertEqual(oldFrame.nAxes, newFrame.nAxes) 

if i == set2.current: 

self.assertTrue(offset + i == set12.current) 

else: 

self.assertFalse(offset + i == set12.current) 

 

def test_AppendIndependent(self): 

"""Check that a concatenated FrameSet is not affected by changes 

to its constituents. 

""" 

set1 = self.makeFrameSet(3, 3) 

set2 = self.makeFrameSet(3, 3) 

set12 = append(set1, set2) 

 

nTotal = set12.nFrame 

x = [1.2, 3.4, 5.6] 

y = set12.applyForward(x) 

 

set1.addFrame(2, makeTwoWayPolyMap(4, 2), Frame(2, "Ident=extra")) 

set1.addFrame(1, makeTwoWayPolyMap(3, 3), Frame(3, "Ident=legume")) 

set1.removeFrame(3) 

set2.addFrame(4, makeForwardPolyMap(1, 4), Frame(4, "Ident=extra")) 

set2.base = 2 

 

# Use exact equality because nothing should change 

self.assertEqual(set12.nFrame, nTotal) 

self.assertEqual(set12.applyForward(x), y) 

 

def test_AppendMismatch(self): 

"""Check that append behaves as expected when joining non-identical frames. 

""" 

set1 = self.makeFrameSet(3, 2) 

set2 = self.makeFrameSet(2, 3) 

set1.addFrame(FrameSet.CURRENT, makeForwardPolyMap(2, 2), 

SkyFrame("Ident=sky")) 

set12 = append(set1, set2) 

 

x = [1.2, 3.4, 5.6] 

y_merged = set12.applyForward(x) 

y_separate = set2.applyForward(set1.applyForward(x)) 

assert_allclose(y_merged, y_separate) 

 

iFrom = set1.current 

iTo = set1.nFrame + set2.base 

self.assertIsInstance(set12.getFrame(iFrom), SkyFrame) 

self.assertNotIsInstance(set12.getFrame(iTo), SkyFrame) 

self.assertIsInstance(set12.getMapping(iFrom, iTo), UnitMap) 

 

 

145 ↛ 146line 145 didn't jump to line 146, because the condition on line 145 was never trueif __name__ == "__main__": 

unittest.main()