Module: Expectation

Defined in:
lib/expectation.rb,
lib/expectation.rb,
lib/expectation/version.rb

Overview

–

Author

radiospiel ([email protected])

Copyright

Copyright © 2011, 2012 radiospiel

License

Distributes under the terms of the Modified BSD License, see LICENSE.BSD for details.

Defined Under Namespace

Modules: Assertions Classes: Error

Constant Summary collapse

VERSION =

The expectation gem’s version.

"1.0.0"

Instance Method Summary collapse

Instance Method Details

#expect!(*expectations, &block) ⇒ Object

Verifies a number of expectations. If one or more expectations are not met it raises an ArgumentError (on the first failing expectation).



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# File 'lib/expectation.rb', line 51

def expect!(*expectations, &block)
  expectations.each do |expectation|
    if expectation.is_a?(Hash)
      expectation.all? do |actual, exp|
        match! actual, exp
      end
    else
      match! expectation, :truish
    end
  end

  match! block, :__block if block
rescue Error
  $!.reraise_with_current_backtrace!
end

#match!(value, expectation, key = nil) ⇒ Object

Matches a value against an expectation. Raises an Expectation::Error if the expectation could not be matched.

Raises:



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# File 'lib/expectation.rb', line 78

def match!(value, expectation, key=nil)
  match = case expectation
    when :truish  then !!value
    when :fail    then false
    when Array    then expectation.any? { |e| _match?(value, e) }
    when Proc     then expectation.arity == 0 ? expectation.call : expectation.call(value)
    when Regexp   then value.is_a?(String) && expectation =~ value
    when :__block then value.call
    when Hash     then Hash === value && 
                       expectation.each { |key, exp| match! value[key], exp, key }
    else               expectation === value
  end

  return if match

  raise Error.new(value, expectation, key && "at key #{key.inspect}")
end

#match?(value, expectation) ⇒ Boolean

Does a value match an expectation?

Returns:

  • (Boolean) 


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# File 'lib/expectation.rb', line 69

def match?(value, expectation)
  match! value, expectation
  true
rescue Error
  false
end