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1# This file is part of daf_butler. 

2# 

3# Developed for the LSST Data Management System. 

4# This product includes software developed by the LSST Project 

5# (http://www.lsst.org). 

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

7# for details of code ownership. 

8# 

9# This program is free software: you can redistribute it and/or modify 

10# it under the terms of the GNU General Public License as published by 

11# the Free Software Foundation, either version 3 of the License, or 

12# (at your option) any later version. 

13# 

14# This program is distributed in the hope that it will be useful, 

15# but WITHOUT ANY WARRANTY; without even the implied warranty of 

16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

17# GNU General Public License for more details. 

18# 

19# You should have received a copy of the GNU General Public License 

20# along with this program. If not, see <http://www.gnu.org/licenses/>. 

21 

22 

23from astropy.table import Table as AstropyTable 

24from astropy.utils.diff import report_diff_values 

25import io 

26 

27 

28class ButlerTestHelper: 

29 """Mixin with helpers for unit tests.""" 

30 

31 def assertAstropyTablesEqual(self, tables, expectedTables): 

32 """Verify that a list of astropy tables matches a list of expected 

33 astropy tables. 

34 

35 Parameters 

36 ---------- 

37 tables : `astropy.table.Table` or iterable [`astropy.table.Table`] 

38 The table or tables that should match the expected tables. 

39 expectedTables : `astropy.table.Table` 

40 or iterable [`astropy.table.Table`] 

41 The tables with expected values to which the tables under test will 

42 be compared. 

43 """ 

44 # If a single table is passed in for tables or expectedTables, put it 

45 # in a list. 

46 if isinstance(tables, AstropyTable): 

47 tables = [tables] 

48 if isinstance(expectedTables, AstropyTable): 

49 expectedTables = [expectedTables] 

50 diff = io.StringIO() 

51 self.assertEqual(len(tables), len(expectedTables)) 

52 for table, expected in zip(tables, expectedTables): 

53 # Assert that we are testing what we think we are testing: 

54 self.assertIsInstance(table, AstropyTable) 

55 self.assertIsInstance(expected, AstropyTable) 

56 # Assert that they match: 

57 self.assertTrue(report_diff_values(table, expected, fileobj=diff), msg="\n" + diff.getvalue())