Coverage for sources/falsifier/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''' Falsifier object. ''' 

22 

23 

24from . import __ 

25 

26 

27class Falsifier( metaclass = __.ImmutableClass ): # pylint: disable=eq-without-hash 

28 ''' Produces falsey objects. 

29 

30 Why not something already in Python? 

31 :py:class:`object` produces truthy objects. 

32 :py:class:`types.NoneType` "produces" falsey ``None`` singleton. 

33 :py:class:`typing_extensions.NoDefault` is truthy singleton. 

34 ''' 

35 

36 def __bool__( self ) -> bool: return False 

37 

38 def __hash__( self ) -> int: return id( self ) 

39 

40 def __repr__( self ) -> str: 

41 return "{fqname}( )".format( fqname = __.calculate_fqname( self ) ) 

42 

43 def __str__( self ) -> str: return 'False_' 

44 

45 def __lt__( self, other: __.typx.Any ) -> __.ComparisonResult: 

46 return NotImplemented 

47 

48 def __le__( self, other: __.typx.Any ) -> __.ComparisonResult: 

49 return NotImplemented 

50 

51 def __eq__( self, other: __.typx.Any ) -> __.ComparisonResult: 

52 return self is other 

53 

54 def __ge__( self, other: __.typx.Any ) -> __.ComparisonResult: 

55 return NotImplemented 

56 

57 def __gt__( self, other: __.typx.Any ) -> __.ComparisonResult: 

58 return NotImplemented 

59 

60 def __ne__( self, other: __.typx.Any ) -> __.ComparisonResult: 

61 return self is not other