Class: RSpec::SleepingKingStudios::Support::ValueSpy

Parent Namespace

RSpec::SleepingKingStudios::Support

Defined In

lib/rspec/sleeping_king_studios/support/value_spy.rb

Table Of Contents

• Overview
  • Examples
• Constructor
• Instance Attributes
  • initial_hash
  • initial_inspect
  • initial_value
• Instance Methods
  • changed?
  • current_value
  • description
  • initialize

Overview

Encapsulates the value of a method call or block, and captures a snapshot of the value at the time the spy is initialized.

Examples

Observing a Method

user  = Person.new(name: 'Alan Bradley')
value = ValueSpy.new(user, :name)
value.initial_value #=> 'Alan Bradley'
value.current_value #=> 'Alan Bradley'

user.name = 'Ed Dillinger'
value.initial_value #=> 'Alan Bradley'
value.current_value #=> 'Ed Dillinger'

Observing a Block

value = ValueSpy.new { Person.where(virtual: false).count }
value.initial_value #=> 4
value.current_value #=> 4

Person.where(name: 'Kevin Flynn').enter_grid!
value.initial_value #=> 4
value.current_value #=> 3

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Constructor

#initialize(receiver, method_name) => Object
#initialize(&block) => Object

Overloads

#initialize(receiver, method_name) => Object

Parameters

• receiver (Object) — The object to watch.
• method_name (Symbol, String) — The name of the method to watch.

#initialize(&block) => Object

Yields

• The value to watch. The block will be called each time the value is requested, and the return value of the block will be given as the current value.

Returns

• (ValueSpy) — a new instance of ValueSpy

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Instance Attributes

#initial_hash => Integer (readonly)

Returns

• (Integer) — the hash of the watched value at the time the spy was initialized.

#initial_inspect => String (readonly)

Returns

• (String) — the string representation of the watched value at the time the spy was initialized

#initial_value => Object (readonly)

Returns

• (Object) — the watched value at the time the spy was initialized.

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Instance Methods

#changed? => Boolean

Returns

• (Boolean)

#current_value => Object

Returns

• (Object) — the watched value when #current_value is called.

#description => String

Returns

• (String) — a human-readable representation of the watched method or block.

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