Class: StateMachine::LoopbackMatcher

Inherits:

Matcher

• Object
• Matcher
• StateMachine::LoopbackMatcher

Includes:

Singleton

Defined in:

lib/state_machine/matcher.rb

Overview

Matches a loopback of two values within a context. Since there is no configuration for this type of matcher, it must be used as a singleton.

Instance Attribute Summary

Attributes inherited from Matcher

#values

Instance Method Summary

• #description ⇒ Object

  A human-readable description of this matcher.

• #matches?(value, context) ⇒ Boolean

  Checks whether the given value matches what the value originally was.

Methods inherited from Matcher

#filter, #initialize

Constructor Details

This class inherits a constructor from StateMachine::Matcher

Instance Method Details

#description ⇒ Object

A human-readable description of this matcher. Always “same”.

# File 'lib/state_machine/matcher.rb', line 119

def description
  'same'
end

#matches?(value, context) ⇒ Boolean

Checks whether the given value matches what the value originally was. This value should be defined in the context.

Examples

matcher = StateMachine::LoopbackMatcher.instance
matcher.matches?(:parked, :from => :parked)   # => true
matcher.matches?(:parked, :from => :idling)   # => false

Returns:

• (Boolean)

# File 'lib/state_machine/matcher.rb', line 114

def matches?(value, context)
  context[:from] == value
end