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# This file is part of astro_metadata_translator. 

# 

# Developed for the LSST Data Management System. 

# This product includes software developed by the LSST Project 

# (http://www.lsst.org). 

# See the LICENSE file at the top-level directory of this distribution 

# for details of code ownership. 

# 

# Use of this source code is governed by a 3-clause BSD-style 

# license that can be found in the LICENSE file. 

 

import unittest 

 

from astro_metadata_translator import merge_headers 

 

 

class HeadersTestCase(unittest.TestCase): 

 

def setUp(self): 

# Define reference headers 

self.h1 = dict( 

ORIGIN="LSST", 

KEY0=0, 

KEY1=1, 

KEY2=3, 

KEY3=3.1415, 

KEY4="a", 

) 

self.h2 = dict( 

ORIGIN="LSST", 

KEY0="0", 

KEY2=4, 

KEY5=42 

) 

self.h3 = dict( 

ORIGIN="AUXTEL", 

KEY3=3.1415, 

KEY2=50, 

KEY5=42, 

) 

self.h4 = dict( 

KEY6="New", 

KEY1="Exists", 

) 

 

def test_fail(self): 

with self.assertRaises(ValueError): 

merge_headers([self.h1], mode="wrong") 

 

with self.assertRaises(ValueError): 

merge_headers([]) 

 

def test_merging_overwrite(self): 

merged = merge_headers([self.h1, self.h2], mode="overwrite") 

 

expected = { 

"ORIGIN": self.h1["ORIGIN"], 

"KEY0": self.h2["KEY0"], 

"KEY1": self.h1["KEY1"], 

"KEY2": self.h2["KEY2"], 

"KEY3": self.h1["KEY3"], 

"KEY4": self.h1["KEY4"], 

"KEY5": self.h2["KEY5"], 

} 

self.assertEqual(merged, expected) 

 

merged = merge_headers([self.h1, self.h2, self.h3, self.h4], 

mode="overwrite") 

 

expected = { 

"ORIGIN": self.h3["ORIGIN"], 

"KEY0": self.h2["KEY0"], 

"KEY1": self.h4["KEY1"], 

"KEY2": self.h3["KEY2"], 

"KEY3": self.h3["KEY3"], 

"KEY4": self.h1["KEY4"], 

"KEY5": self.h3["KEY5"], 

"KEY6": self.h4["KEY6"], 

} 

 

self.assertEqual(merged, expected) 

 

def test_merging_first(self): 

merged = merge_headers([self.h1, self.h2, self.h3, self.h4], 

mode="first") 

 

expected = { 

"ORIGIN": self.h1["ORIGIN"], 

"KEY0": self.h1["KEY0"], 

"KEY1": self.h1["KEY1"], 

"KEY2": self.h1["KEY2"], 

"KEY3": self.h1["KEY3"], 

"KEY4": self.h1["KEY4"], 

"KEY5": self.h2["KEY5"], 

"KEY6": self.h4["KEY6"], 

} 

 

self.assertEqual(merged, expected) 

 

def test_merging_drop(self): 

merged = merge_headers([self.h1, self.h2, self.h3, self.h4], 

mode="drop") 

 

expected = { 

"KEY3": self.h1["KEY3"], 

"KEY4": self.h1["KEY4"], 

"KEY5": self.h2["KEY5"], 

"KEY6": self.h4["KEY6"], 

} 

 

self.assertEqual(merged, expected) 

 

def test_merging_append(self): 

# Try with two headers first 

merged = merge_headers([self.h1, self.h2], mode="append") 

 

expected = { 

"ORIGIN": self.h1["ORIGIN"], 

"KEY0": [self.h1["KEY0"], self.h2["KEY0"]], 

"KEY1": self.h1["KEY1"], 

"KEY2": [self.h1["KEY2"], self.h2["KEY2"]], 

"KEY3": self.h1["KEY3"], 

"KEY4": self.h1["KEY4"], 

"KEY5": self.h2["KEY5"], 

} 

 

self.assertEqual(merged, expected) 

 

merged = merge_headers([self.h1, self.h2, self.h3, self.h4], 

mode="append") 

 

expected = { 

"ORIGIN": [self.h1["ORIGIN"], self.h2["ORIGIN"], self.h3["ORIGIN"], None], 

"KEY0": [self.h1["KEY0"], self.h2["KEY0"], None, None], 

"KEY1": [self.h1["KEY1"], None, None, self.h4["KEY1"]], 

"KEY2": [self.h1["KEY2"], self.h2["KEY2"], self.h3["KEY2"], None], 

"KEY3": self.h3["KEY3"], 

"KEY4": self.h1["KEY4"], 

"KEY5": self.h3["KEY5"], 

"KEY6": self.h4["KEY6"], 

} 

 

self.assertEqual(merged, expected) 

 

 

146 ↛ 147line 146 didn't jump to line 147, because the condition on line 146 was never trueif __name__ == "__main__": 

unittest.main()