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Class: RSpec::Matchers::BuiltIn::YieldWithArgs Private

Do not use. This class is for internal use only.
Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, BaseMatcher
Instance Chain:
self, BaseMatcher, BaseMatcher::DefaultFailureMessages, BaseMatcher::StringEncodingFormatting, BaseMatcher::HashFormatting, ::RSpec::Matchers::Composable
Inherits: RSpec::Matchers::BuiltIn::BaseMatcher
Defined in: rspec-expectations/lib/rspec/matchers/built_in/yield.rb

Overview

Provides the implementation for ‘yield_with_args`. Not intended to be instantiated directly.

Constant Summary

BaseMatcher - Inherited

UNDEFINED

Class Method Summary

BaseMatcher - Inherited

.matcher_name, .new,
.underscore

Borrowed from ActiveSupport.

Instance Attribute Summary

BaseMatcher - Inherited

#actual,
#diffable?

::RSpec::Matchers are not diffable by default.
#expected, #expects_call_stack_jump?, #matcher_name, #matcher_name=, #rescued_exception,
#supports_block_expectations?

Most matchers are value matchers (i.e. meant to work with ‘expect(value)`) rather than block matchers (i.e. meant to work with `expect { }`), so this defaults to false.
#supports_value_expectations?

BaseMatcher::StringEncodingFormatting - Included

#string_encoding_differs?

Instance Method Summary

BaseMatcher - Inherited

#actual_formatted,
#description

Generates a description using ::RSpec::Matchers::EnglishPhrasing.
#expected_formatted,
#match_unless_raises

Used to wrap a block of code that will indicate failure by raising one of the named exceptions.
#matches?

Indicates if the match is successful.
#assert_ivars,
#present_ivars

:nocov:

BaseMatcher::DefaultFailureMessages - Included

#failure_message

Provides a good generic failure message.
#failure_message_when_negated

Provides a good generic negative failure message.

BaseMatcher::StringEncodingFormatting - Included

#format_encoding

Formats a String’s encoding as a human readable string.

BaseMatcher::HashFormatting - Included

#improve_hash_formatting

‘{ :a => 5, :b => 2 }.inspect` produces:

::RSpec::Matchers::Composable - Included

#&

Alias for Composable#and.
#===

Delegates to ‘#matches?`.
#and

Creates a compound ‘and` expectation.
#description_of

Returns the description of the given object in a way that is aware of composed matchers.
#or

Creates a compound ‘or` expectation.
#values_match?

This provides a generic way to fuzzy-match an expected value against an actual value.
#|

Alias for Composable#or.
#should_enumerate?

We should enumerate arrays as long as they are not recursive.
#surface_descriptions_in

Transforms the given data structure (typically a hash or array) into a new data structure that, when ‘#inspect` is called on it, will provide descriptions of any contained matchers rather than the normal #inspect output.
#unreadable_io?,
#with_matchers_cloned

Historically, a single matcher instance was only checked against a single value.

Instance Attribute Details

#all_args_match? ⇒ Boolean (readonly, private)

[ GitHub ] 

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 288



def all_args_match?
  values_match?(@expected, @actual)
end


  








  

    #args_currently_match?  ⇒ Boolean  (readonly, private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 273



def args_currently_match?
  if @expected.empty? # expect {...}.to yield_with_args
    @positive_args_failure = 'yielded with no arguments' if @actual.empty?
    return !@actual.empty?
  end

  unless (match = all_args_match?)
    @positive_args_failure = 'yielded with unexpected arguments' \
      "\nexpected: #{surface_descriptions_in(@expected).inspect}" \
      "\n     got: #{@actual_formatted}"
  end

  match
end


  








  

    #supports_block_expectations?  ⇒ Boolean  (readonly)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 240



def supports_block_expectations?
  true
end


  








  

    #supports_value_expectations?  ⇒ Boolean  (readonly)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 245



def supports_value_expectations?
  false
end


  







Instance Method Details



  

    #description  
  

  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 233



def description
  desc = 'yield with args'
  desc = "#{desc}(#{expected_arg_description})" unless @expected.empty?
  desc
end


  








  

    #does_not_match?(block)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 218



def does_not_match?(block)
  !matches?(block) && @probe.has_block?
end


  








  

    #expected_arg_description   (private)
  

  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 257



def expected_arg_description
  @expected.map { |e| description_of e }.join(', ')
end


  








  

    #failure_message  
  

  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 223



def failure_message
  "expected given block to yield with arguments, but #{positive_failure_reason}"
end


  








  

    #failure_message_when_negated  
  

  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 228



def failure_message_when_negated
  "expected given block not to yield with arguments, but #{negative_failure_reason}"
end


  








  

    #matches?(block)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 205



def matches?(block)
  @args_matched_when_yielded = true
  @probe = YieldProbe.new(block) do
    @actual = @probe.single_yield_args
    @actual_formatted = actual_formatted
    @args_matched_when_yielded &&= args_currently_match?
  end
  return false unless @probe.has_block?
  @probe.probe
  @probe.yielded_once?(:yield_with_args) && @args_matched_when_yielded
end


  








  

    #negative_failure_reason   (private)
  

  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 261



def negative_failure_reason
  if !@probe.has_block?
    'was not a block'
  elsif @args_matched_when_yielded && !@expected.empty?
    'yielded with expected arguments' \
      "\nexpected not: #{surface_descriptions_in(@expected).inspect}" \
      "\n         got: #{@actual_formatted}"
  else
    'did'
  end
end


  








  

    #positive_failure_reason   (private)
  

  [ GitHub ]


  

  


# File 'rspec-expectations/lib/rspec/matchers/built_in/yield.rb', line 251



def positive_failure_reason
  return 'was not a block' unless @probe.has_block?
  return 'did not yield' if @probe.num_yields.zero?
  @positive_args_failure
end