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Module: RSpec::Matchers::BuiltIn::CountExpectation Private

Do not use. This module is for internal use only.
Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Included In:
Include, YieldControl
Defined in: rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb

Overview

Abstract class to implement ‘once`, #at_least and other count constraints.

Instance Attribute Summary

Instance Method Summary

Instance Attribute Details

#count_expectation_type (readonly, protected)

[ GitHub ] 

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 55



attr_reader :count_expectation_type, :expected_count


  








  

    #expected_count   (readonly, protected)
  

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# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 55



attr_reader :count_expectation_type, :expected_count


  








  

    #has_expected_count?  ⇒ Boolean  (readonly, private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 77



def has_expected_count?
  !!count_expectation_type
end


  







Instance Method Details



  

    #at_least(number)  
  



  

    

Specifies the minimum number of times the method is expected to match


  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 42



def at_least(number)
  set_expected_count(:>=, number)
  self
end


  








  

    #at_most(number)  
  



  

    

Specifies the maximum number of times the method is expected to match


  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 35



def at_most(number)
  set_expected_count(:<=, number)
  self
end


  








  

    #count_constraint_to_number(n)   (private)
  

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# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 120



def count_constraint_to_number(n)
  case n
  when Numeric then n
  when :once then 1
  when :twice then 2
  when :thrice then 3
  else
    raise ArgumentError, "Expected a number, :once, :twice or :thrice," \
      " but got #{n}"
  end
end


  








  

    #count_expectation_description   (private)
  

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# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 139



def count_expectation_description
  "#{human_readable_expectation_type}#{human_readable_count(expected_count)}"
end


  








  

    #count_failure_reason(action)   (private)
  

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# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 143



def count_failure_reason(action)
  "#{count_expectation_description}" \
  " but #{action}#{human_readable_count(@actual_count)}"
end


  








  

    #cover?(count, number)   (private)
  



  

    

See additional method definition at line 60.


  



  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 64



def cover?(count, number)
  count.cover?(number)
end


  








  

    #exactly(number)  
  



  

    

Specifies that the method is expected to match the given number of times.


  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 28



def exactly(number)
  set_expected_count(:==, number)
  self
end


  








  

    #expected_count_matches?(actual_count)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 69



def expected_count_matches?(actual_count)
  @actual_count = actual_count
  return @actual_count > 0 unless count_expectation_type
  return cover?(expected_count, actual_count) if count_expectation_type == :<=>

  @actual_count.__send__(count_expectation_type, expected_count)
end


  








  

    #human_readable_count(count)   (private)
  

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# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 157



def human_readable_count(count)
  case count
  when Range then " #{count.first} and #{count.last} times"
  when nil then ''
  when 1 then ' once'
  when 2 then ' twice'
  else " #{count} times"
  end
end


  








  

    #human_readable_expectation_type   (private)
  

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# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 148



def human_readable_expectation_type
  case count_expectation_type
  when :<= then ' at most'
  when :>= then ' at least'
  when :<=> then ' between'
  else ''
  end
end


  








  

    #once  
  



  

    

Specifies that the method is expected to match once.


  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 10



def once
  exactly(1)
end


  








  

    #raise_impossible_count_expectation(count)   (private)
  



  

    
  





  
Raises:


    
  
  • 
    (ArgumentError)
  
    • 





  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 100



def raise_impossible_count_expectation(count)
  text =
    case count_expectation_type
    when :<= then "at_least(#{count}).at_most(#{expected_count})"
    when :>= then "at_least(#{expected_count}).at_most(#{count})"
    end
  raise ArgumentError, "The constraint #{text} is not possible"
end


  








  

    #raise_unsupported_count_expectation   (private)
  



  

    
  





  
Raises:


    
  
  • 
    (ArgumentError)
  
    • 





  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 109



def raise_unsupported_count_expectation
  text =
    case count_expectation_type
    when :<= then "at_least"
    when :>= then "at_most"
    when :<=> then "at_least/at_most combination"
    else "count"
    end
  raise ArgumentError, "Multiple #{text} constraints are not supported"
end


  








  

    #set_expected_count(relativity, n)   (private)
  

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# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 81



def set_expected_count(relativity, n)
  raise_unsupported_count_expectation if unsupported_count_expectation?(relativity)

  count = count_constraint_to_number(n)

  if count_expectation_type == :<= && relativity == :>=
    raise_impossible_count_expectation(count) if count > expected_count
    @count_expectation_type = :<=>
    @expected_count = count..expected_count
  elsif count_expectation_type == :>= && relativity == :<=
    raise_impossible_count_expectation(count) if count < expected_count
    @count_expectation_type = :<=>
    @expected_count = expected_count..count
  else
    @count_expectation_type = relativity
    @expected_count = count
  end
end


  








  

    #thrice  
  



  

    

Specifies that the method is expected to match thrice.


  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 22



def thrice
  exactly(3)
end


  








  

    #times  
  



  

    

No-op. Provides syntactic sugar.


  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 49



def times
  self
end


  








  

    #twice  
  



  

    

Specifies that the method is expected to match twice.


  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 16



def twice
  exactly(2)
end


  








  

    #unsupported_count_expectation?(relativity)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/count_expectation.rb', line 132



def unsupported_count_expectation?(relativity)
  return true if count_expectation_type == :==
  return true if count_expectation_type == :<=>
  (count_expectation_type == :<= && relativity == :<=) ||
    (count_expectation_type == :>= && relativity == :>=)
end