Class: Spy::Instance

Inherits:
Object
  • Object
show all
Defined in:
lib/spy/instance.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(blueprint) ⇒ Instance

Returns a new instance of Instance.



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# File 'lib/spy/instance.rb', line 13

def initialize(blueprint)
  original =
    case blueprint.type
    when :dynamic_delegation
      FakeMethod.new(blueprint.msg) { |*args, &block| blueprint.target.method_missing(blueprint.msg, *args, &block) }
    when :instance_method
      blueprint.target.instance_method(blueprint.msg)
    else
      blueprint.target.method(blueprint.msg)
    end

  @original = original
  @spied = blueprint.target
  @strategy = choose_strategy(blueprint)
  @call_history = []

  @internal = {}
  @internal[:conditional_filters] = []
  @internal[:before_callbacks] = []
  @internal[:after_callbacks]= []
  @internal[:around_procs] = []
  @internal[:instead]= nil
end

Instance Attribute Details

#call_history ⇒ Object (readonly)

Returns the value of attribute call_history.



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# File 'lib/spy/instance.rb', line 11

def call_history
  @call_history
end

#original ⇒ Object (readonly)

Returns the value of attribute original.



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# File 'lib/spy/instance.rb', line 11

def original
  @original
end

#spied ⇒ Object (readonly)

Returns the value of attribute spied.



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# File 'lib/spy/instance.rb', line 11

def spied
  @spied
end

#strategy ⇒ Object (readonly)

Returns the value of attribute strategy.



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# File 'lib/spy/instance.rb', line 11

def strategy
  @strategy
end

Instance Method Details

#after(&block) ⇒ Object 



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# File 'lib/spy/instance.rb', line 76

def after(&block)
  @internal[:after_callbacks] << block
  self
end

#apply(method_call) ⇒ Object 



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# File 'lib/spy/instance.rb', line 100

def apply(method_call)
  return method_call.call_original unless passes_all_conditions?(method_call)

  result = nil
  runner =
    if @internal[:instead]
      proc do
        @call_history << method_call
        result = @internal[:instead].call(method_call)
      end
    else
      proc do
        @call_history << method_call
        result = method_call.call_original(true)
      end
    end

  if @internal[:around_procs].any?
    runner = @internal[:around_procs].reduce(runner) do |p, wrapper|
      proc { wrapper[method_call, &p] }
    end
  end

  run_before_callbacks(method_call)

  runner.call

  run_after_callbacks(method_call)

  result
end

#before(&block) ⇒ Object 



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# File 'lib/spy/instance.rb', line 71

def before(&block)
  @internal[:before_callbacks] << block
  self
end

#call_count ⇒ Object 



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# File 'lib/spy/instance.rb', line 41

def call_count
  @call_history.size
end

#call_original(*args) ⇒ Object 



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# File 'lib/spy/instance.rb', line 91

def call_original(*args)
  if original.is_a?(UnboundMethod)
    call_original_unbound_method(*args)
  else
    call_original_method(*args)
  end
end

#called? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spy/instance.rb', line 86

def called?
  @call_history.any?
end

#instead(&block) ⇒ Object 



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# File 'lib/spy/instance.rb', line 81

def instead(&block)
  @internal[:instead] = block
  self
end

#name ⇒ Object 



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# File 'lib/spy/instance.rb', line 37

def name
  @original.name
end

#replay_all ⇒ Object 



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# File 'lib/spy/instance.rb', line 45

def replay_all
  @call_history.map(&:replay)
end

#start ⇒ Object 



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# File 'lib/spy/instance.rb', line 49

def start
  @strategy.apply
  self
end

#stop ⇒ Object 



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# File 'lib/spy/instance.rb', line 54

def stop
  @strategy.undo
  self
end

#when(&block) ⇒ Object 



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# File 'lib/spy/instance.rb', line 59

def when(&block)
  @internal[:conditional_filters] << block
  self
end

#wrap(&block) ⇒ Object

Expect block to yield. Call the rest of the chain when it does



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# File 'lib/spy/instance.rb', line 66

def wrap(&block)
  @internal[:around_procs] << block
  self
end