Class: RLab::Assert::Assertion

Inherits:
Object
  • Object
show all
Includes:
Observable
Defined in:
lib/rlab/assert/assertion.rb

Direct Known Subclasses

Refutation

Defined Under Namespace

Classes: SubjectThunk

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(subject_proc, checks) ⇒ Assertion

Returns a new instance of Assertion.



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# File 'lib/rlab/assert/assertion.rb', line 12

def initialize subject_proc, checks
  @subject_proc = subject_proc
  @checks = checks
  @passes = []
  @fails  = []
  @trace = caller_locations
end

Instance Attribute Details

#fails ⇒ Object (readonly)

Returns the value of attribute fails.



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# File 'lib/rlab/assert/assertion.rb', line 8

def fails
  @fails
end

#passes ⇒ Object (readonly)

Returns the value of attribute passes.



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# File 'lib/rlab/assert/assertion.rb', line 9

def passes
  @passes
end

#source ⇒ Object

Returns the value of attribute source.



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# File 'lib/rlab/assert/assertion.rb', line 10

def source
  @source
end

Instance Method Details

#assert ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 20

def assert
  changed
  perform_checks
  freeze
  raise to_error if failed?
  subject
ensure
  notify_observers self
end

#build_checks ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 30

def build_checks
  @checks.map do |check_name, argument|
    resolve_check check_name, argument
  end
end

#failed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rlab/assert/assertion.rb', line 36

def failed?
  fails.any?
end

#file ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 40

def file
  @trace[0].path
end

#freeze ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 44

def freeze
  passes.freeze
  fails.freeze
end

#line ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 49

def line
  @trace[0].lineno
end

#passed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rlab/assert/assertion.rb', line 53

def passed?
  not failed?
end

#perform_checks ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 57

def perform_checks
  build_checks.each do |check|
    check.evaluate
    ary = if check.passed? then passes else fails end
    ary.push check
  end
end

#resolve_check(check_name, argument) ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 65

def resolve_check check_name, argument
  check = Checks.resolve check_name do
    check_name = :include if check_name == :includes
    argument = [check_name, *argument]
    Checks[:predicate]
  end
  check.new subject_thunk, argument
end

#subject ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 74

def subject
  subject_thunk.call
end

#subject_thunk ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 78

def subject_thunk
  @subject_thunk ||= SubjectThunk.new @subject_proc
end

#to_error ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 82

def to_error
  AssertionFailed.new self
end

#trace ⇒ Object 



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# File 'lib/rlab/assert/assertion.rb', line 86

def trace
  Assert.filter_trace @trace
end