Class: Propr::Runner

Inherits:
Object show all
Defined in:
lib/propr/runner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(minpass, maxskip, scale) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/propr/runner.rb', line 5

def initialize(minpass, maxskip, scale)
  @minpass, @maxskip, @scale =
    minpass, maxskip, scale || lambda {|*_| 1 }
end

Instance Attribute Details

#maxskip ⇒ Object (readonly)

Returns the value of attribute maxskip.



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# File 'lib/propr/runner.rb', line 3

def maxskip
  @maxskip
end

#minpass ⇒ Object (readonly)

Returns the value of attribute minpass.



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# File 'lib/propr/runner.rb', line 3

def minpass
  @minpass
end

Instance Method Details

#run(property, generator) ⇒ Object 



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# File 'lib/propr/runner.rb', line 10

def run(property, generator)
  passed  = 0
  skipped = 0
  wrapped = Dsl::Check.wrap(generator)

  until passed >= @minpass or skipped >= @maxskip
    input, _, success =
      Random.run(wrapped, @scale.call(passed, skipped, @minpass, @maxskip))

    # Generator should've returned an argument list. Except, for convenience,
    # single-argument properties should have generators which return a single
    # value, not an argument list, and we'll make it an argument list *here*.
    input = property.arity == 1 ?
      [input] : input

    if success
      begin
        result = property.call(*input)
        # result = property.arity == 1 ?
        #   property.call(input) : property.call(*input)

        if result
          passed += 1
        else
          # Falsifiable
          return [false, passed, skipped, input]
        end
      rescue GuardFailure => e
        # GuardFailure in property
        skipped += 1
      rescue
        raise Failure.new($!, input, nil, passed, skipped)#, nil, location
      end
    else
      # GuardFailure in generator
      skipped += 1
    end
  end

  # Might have not passed enough tests
  [passed >= @minpass, passed, skipped, nil]
end