Coverage for tests/test_000_falsifier/test_100_objects.py: 100%

1# vim: set filetype=python fileencoding=utf-8: 

2# -*- coding: utf-8 -*- 

3 

4#============================================================================# 

5# # 

6# Licensed under the Apache License, Version 2.0 (the "License"); # 

7# you may not use this file except in compliance with the License. # 

8# You may obtain a copy of the License at # 

9# # 

10# http://www.apache.org/licenses/LICENSE-2.0 # 

11# # 

12# Unless required by applicable law or agreed to in writing, software # 

13# distributed under the License is distributed on an "AS IS" BASIS, # 

14# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # 

15# See the License for the specific language governing permissions and # 

16# limitations under the License. # 

17# # 

18#============================================================================# 

19 

20 

21''' Assert correct function of Falsifier class. ''' 

22 

23 

24import pytest 

25 

26from . import PACKAGE_NAME, cache_import_module 

27 

28 

29def test_100_instantiation( ): 

30 ''' Class instantiates. ''' 

31 module = cache_import_module( f"{PACKAGE_NAME}.objects" ) 

32 obj = module.Falsifier( ) 

33 assert isinstance( obj, module.Falsifier ) 

34 

35 

36def test_101_boolean_evaluation( ): 

37 ''' Object evaluates to False. ''' 

38 module = cache_import_module( f"{PACKAGE_NAME}.objects" ) 

39 obj = module.Falsifier( ) 

40 assert not obj 

41 assert False == bool( obj ) # noqa: E712 

42 

43 

44def test_102_equality( ): 

45 ''' Object equality is identity-based. ''' 

46 module = cache_import_module( f"{PACKAGE_NAME}.objects" ) 

47 obj1 = module.Falsifier( ) 

48 obj2 = module.Falsifier( ) 

49 assert obj1 == obj1 

50 assert obj1 != obj2 

51 assert not (obj1 == obj2) 

52 

53 

54def test_103_hash_uniqueness( ): 

55 ''' Object hashes are unique. ''' 

56 module = cache_import_module( f"{PACKAGE_NAME}.objects" ) 

57 obj1 = module.Falsifier( ) 

58 obj2 = module.Falsifier( ) 

59 assert hash( obj1 ) != hash( obj2 ) 

60 assert hash( obj1 ) == hash( obj1 ) 

61 

62 

63def test_104_string_representations( ): 

64 ''' Object has expected string representations. ''' 

65 module = cache_import_module( f"{PACKAGE_NAME}.objects" ) 

66 obj = module.Falsifier( ) 

67 assert 'False_' == str( obj ) 

68 assert f'{PACKAGE_NAME}.objects.Falsifier( )' == repr( obj ) 

69 

70 

71def test_105_ordering_operations( ): 

72 ''' Object does not support ordering. ''' 

73 module = cache_import_module( f"{PACKAGE_NAME}.objects" ) 

74 obj1 = module.Falsifier( ) 

75 obj2 = module.Falsifier( ) 

76 with pytest.raises( TypeError ): 

77 _ = obj1 < obj2 

78 with pytest.raises( TypeError ): 

79 _ = obj1 <= obj2 

80 with pytest.raises( TypeError ): 

81 _ = obj1 > obj2 

82 with pytest.raises( TypeError ): 

83 _ = obj1 >= obj2 

84 

85 

86def test_106_class_immutability( ): 

87 ''' Class attributes are immutable. ''' 

88 module = cache_import_module( f"{PACKAGE_NAME}.objects" ) 

89 with pytest.raises( AttributeError ): 

90 module.Falsifier.new_attr = 42 

91 with pytest.raises( AttributeError ): 

92 del module.Falsifier.new_attr 

93 

94 

95def test_107_collection_usage( ): 

96 ''' Object works in collections. ''' 

97 module = cache_import_module( f"{PACKAGE_NAME}.objects" ) 

98 obj1 = module.Falsifier( ) 

99 obj2 = module.Falsifier( ) 

100 unique_set = { obj1, obj2, obj1 } 

101 assert 2 == len( unique_set ) 

102 assert obj1 in unique_set 

103 assert obj2 in unique_set 

104 mapping = { obj1: 'first', obj2: 'second' } 

105 assert 'first' == mapping[ obj1 ] 

106 assert 'second' == mapping[ obj2 ] 

107 

108 

109def test_900_docstring_sanity( ): 

110 ''' Class has valid docstring. ''' 

111 module = cache_import_module( f"{PACKAGE_NAME}.objects" ) 

112 assert hasattr( module.Falsifier, '__doc__' ) 

113 assert isinstance( module.Falsifier.__doc__, str ) 

114 assert module.Falsifier.__doc__