Exception: Scientist::Experiment::MismatchError

Inherits:
Exception
  • Object
show all
Defined in:
lib/scientist/experiment.rb

Overview

A mismatch, raised when raise_on_mismatches is enabled.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, result) ⇒ MismatchError

Returns a new instance of MismatchError.



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# File 'lib/scientist/experiment.rb', line 34

def initialize(name, result)
  @name   = name
  @result = result
  super "experiment '#{name}' observations mismatched"
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/scientist/experiment.rb', line 32

def name
  @name
end

#result ⇒ Object (readonly)

Returns the value of attribute result.



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# File 'lib/scientist/experiment.rb', line 32

def result
  @result
end

Instance Method Details

#format_observation(observation) ⇒ Object 



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# File 'lib/scientist/experiment.rb', line 51

def format_observation(observation)
  observation.name + ":\n" +
  if observation.raised?
    lines = observation.exception.backtrace.map { |line| "    #{line}" }.join("\n")
    "  #{observation.exception.inspect}" + "\n" + lines
  else
    "  #{observation.cleaned_value.inspect}"
  end
end

#to_s ⇒ Object

The default formatting is nearly unreadable, so make it useful.

The assumption here is that errors raised in a test environment are printed out as strings, rather than using #inspect.



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# File 'lib/scientist/experiment.rb', line 44

def to_s
  super + ":\n" +
  format_observation(result.control) + "\n" +
  result.candidates.map { |candidate| format_observation(candidate) }.join("\n") +
  "\n"
end