Source Code for Module test_suite.unit_tests.test_float

  1  ############################################################################### 
  2  #                                                                             # 
  3  # Copyright (C) 2006 Gary Thompson                                            # 
  4  # Copyright (C) 2009-2012 Edward d'Auvergne                                   # 
  5  #                                                                             # 
  6  # This file is part of the program relax (http://www.nmr-relax.com).          # 
  7  #                                                                             # 
  8  # This program is free software: you can redistribute it and/or modify        # 
  9  # it under the terms of the GNU General Public License as published by        # 
 10  # the Free Software Foundation, either version 3 of the License, or           # 
 11  # (at your option) any later version.                                         # 
 12  #                                                                             # 
 13  # This program is distributed in the hope that it will be useful,             # 
 14  # but WITHOUT ANY WARRANTY; without even the implied warranty of              # 
 15  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               # 
 16  # GNU General Public License for more details.                                # 
 17  #                                                                             # 
 18  # You should have received a copy of the GNU General Public License           # 
 19  # along with this program.  If not, see <http://www.gnu.org/licenses/>.       # 
 20  #                                                                             # 
 21  ############################################################################### 
 22   
 23  # Python module imports. 
 24  from unittest import TestCase 
 25  from float import * 
 26  from copy import copy 
 27   
 28   
 29  # Some constants for the tests. 
 30  FLOAT_EPSILON = packBytesAsPyFloat([1, 0, 0, 0, 0, 0, 0, 0]) 
 31  NEG_FLOAT_EPSILON = packBytesAsPyFloat([1, 0, 0, 0, 0, 0, 0, 128]) 
 32  FLOAT_NORMAL = packBytesAsPyFloat([0, 0, 0, 0, 128, 132, 46, 65]) 
 33  NEG_FLOAT_NORMAL = packBytesAsPyFloat([0, 0, 0, 0, 128, 132, 46, 193]) 
 34  ZERO = packBytesAsPyFloat([0, 0, 0, 0, 0, 0, 0, 0]) 
 35  NEG_ZERO = packBytesAsPyFloat([0, 0, 0, 0, 0, 0, 0, 128]) 
 36   
 37   
 38 -def make_dict_by_id(elements): 
 39      """Convert the list into a dictionary of pointer:value pairs.""" 
 40   
 41      # Convert. 
 42      result = {} 
 43      for element in elements: 
 44          result[id(element)] = element 
 45   
 46      # Return the dictionary. 
 47      return result 
 48   
 49   
 50 -def winnow_dist_to_list_by_id(dict, exclude): 
 51      """Generate a list of values in dict excluding the values given.""" 
 52   
 53      # Generate a new dictionary with the excluded values missing. 
 54      resultDict = copy(dict) 
 55      for val in exclude: 
 56          del(resultDict[id(val)]) 
 57   
 58      # Return as a list. 
 59      return list(resultDict.values()) 
 60   
 61   
 62 -class Test_float(TestCase): 
 63      """Unit tests for the functions of the 'float' module.""" 
 64   
 65      # A dictionary of all numerical types (the key is the memory address, i.e. this is like a pointer). 
 66      num_types = make_dict_by_id([pos_inf, neg_inf, FLOAT_NORMAL, NEG_FLOAT_NORMAL, FLOAT_EPSILON, NEG_FLOAT_EPSILON, nan, ZERO, NEG_ZERO]) 
 67   
 68 -    def do_test_sets(self, function, true_class=[], false_class=[]): 
 69          """Method for checking all the values against the given function.""" 
 70   
 71          # The numbers that should return true. 
 72          for val in true_class: 
 73              self.assertEqual(function(val), True) 
 74   
 75          # The numbers that should return false. 
 76          for val in false_class: 
 77              self.assertEqual(function(val), False) 
 78   
 79   
 80 -    def test_getFloatClass(self): 
 81          """Test the float.getFloatClass() function.""" 
 82   
 83          tests = (CLASS_POS_INF,        pos_inf, 
 84                   CLASS_NEG_INF,        neg_inf, 
 85                   CLASS_POS_NORMAL,     FLOAT_NORMAL, 
 86                   CLASS_NEG_NORMAL,     -FLOAT_NORMAL, 
 87                   CLASS_POS_DENORMAL,   FLOAT_EPSILON, 
 88                   CLASS_NEG_DENORMAL,   -FLOAT_EPSILON, 
 89                   CLASS_QUIET_NAN,      nan, 
 90                   # WE DON'T USE SIGNAL NANS CLASS_SIGNAL_NAN, 
 91                   CLASS_POS_ZERO,       ZERO, 
 92                   CLASS_NEG_ZERO,       -ZERO 
 93          ) 
 94   
 95          i = iter(tests) 
 96          for (fpClass, value) in zip(i, i): 
 97              self.assertEqual(fpClass, getFloatClass(value)) 
 98   
 99   
100 -    def test_isPositive(self): 
101          """Test the float.isZero() function.""" 
102   
103          # Negative values. 
104          negatives = (neg_inf, NEG_FLOAT_NORMAL, NEG_FLOAT_EPSILON, NEG_ZERO) 
105   
106          # Positive values. 
107          positives = winnow_dist_to_list_by_id(self.num_types, negatives) 
108   
109          # Run the tests. 
110          self.do_test_sets(isPositive, true_class=positives, false_class=negatives) 
111   
112   
113 -    def test_isZero(self): 
114          """Test the float.isZero() function.""" 
115   
116          # The zeros. 
117          zeros = (ZERO, NEG_ZERO) 
118   
119          # All other numbers. 
120          non_zeros = winnow_dist_to_list_by_id(self.num_types, zeros) 
121   
122          # Run the tests. 
123          self.do_test_sets(isZero, true_class=zeros, false_class=non_zeros) 
124