module Mocha::ObjectMethods

Methods added to all objects to allow mocking and stubbing on real (i.e. non-mock) objects.

Both {#expects} and {#stubs} return an {Expectation} which can be further modified by methods on {Expectation}.

Public Instance Methods

expects(expected_methods_vs_return_values) click to toggle source

Adds an expectation that the specified method must be called exactly once with any parameters.

The original implementation of the method is replaced during the test and then restored at the end of the test. The temporary replacement method has the same visibility as the original method.

@return [Expectation] last-built expectation which can be further modified by methods on {Expectation}. @raise [StubbingError] if attempting to stub method which is not allowed.

@overload def expects(method_name)

@param [Symbol,String] method_name name of expected method

@overload def expects(expected_methods_vs_return_values)

@param [Hash] expected_methods_vs_return_values expected method name symbols as keys and corresponding return values as values - these expectations are setup as if {#expects} were called multiple times.

@example Setting up an expectation on a non-mock object.

product = Product.new
product.expects(:save).returns(true)
assert_equal true, product.save

@example Setting up multiple expectations on a non-mock object.

product = Product.new
product.expects(:valid? => true, :save => true)

# exactly equivalent to

product = Product.new
product.expects(:valid?).returns(true)
product.expects(:save).returns(true)

@see Mock#expects

# File lib/mocha/object_methods.rb, line 71
def expects(expected_methods_vs_return_values)
  if expected_methods_vs_return_values.to_s =~ /the[^a-z]*spanish[^a-z]*inquisition/i
    raise ExpectationErrorFactory.build('NOBODY EXPECTS THE SPANISH INQUISITION!')
  end
  if frozen?
    raise StubbingError.new("can't stub method on frozen object: #{mocha_inspect}", caller)
  end
  expectation = nil
  mockery = Mocha::Mockery.instance
  iterator = ArgumentIterator.new(expected_methods_vs_return_values)
  iterator.each do |*args|
    method_name = args.shift
    mockery.on_stubbing(self, method_name)
    method = stubba_method.new(stubba_object, method_name)
    mockery.stubba.stub(method)
    expectation = mocha.expects(method_name, caller)
    expectation.returns(args.shift) unless args.empty?
  end
  expectation
end
mocha(instantiate = true) click to toggle source

@private

# File lib/mocha/object_methods.rb, line 15
def mocha(instantiate = true)
  if instantiate
    @mocha ||= Mocha::Mockery.instance.mock_impersonating(self)
  else
    defined?(@mocha) ? @mocha : nil
  end
end
reset_mocha() click to toggle source

@private

# File lib/mocha/object_methods.rb, line 24
def reset_mocha
  @mocha = nil
end
stubba_class() click to toggle source

@private

# File lib/mocha/object_methods.rb, line 39
def stubba_class
  singleton_class
end
stubba_method() click to toggle source

@private

# File lib/mocha/object_methods.rb, line 29
def stubba_method
  Mocha::InstanceMethod
end
stubba_object() click to toggle source

@private

# File lib/mocha/object_methods.rb, line 34
def stubba_object
  self
end
stubs(stubbed_methods_vs_return_values) click to toggle source

Adds an expectation that the specified method may be called any number of times with any parameters.

The original implementation of the method is replaced during the test and then restored at the end of the test. The temporary replacement method has the same visibility as the original method.

@return [Expectation] last-built expectation which can be further modified by methods on {Expectation}. @raise [StubbingError] if attempting to stub method which is not allowed.

@overload def stubs(method_name)

@param [Symbol,String] method_name name of stubbed method

@overload def stubs(stubbed_methods_vs_return_values)

@param [Hash] stubbed_methods_vs_return_values stubbed method name symbols as keys and corresponding return values as values - these stubbed methods are setup as if {#stubs} were called multiple times.

@example Setting up a stubbed methods on a non-mock object.

product = Product.new
product.stubs(:save).returns(true)
assert_equal true, product.save

@example Setting up multiple stubbed methods on a non-mock object.

product = Product.new
product.stubs(:valid? => true, :save => true)

# exactly equivalent to

product = Product.new
product.stubs(:valid?).returns(true)
product.stubs(:save).returns(true)

@see Mock#stubs

# File lib/mocha/object_methods.rb, line 120
def stubs(stubbed_methods_vs_return_values)
  if frozen?
    raise StubbingError.new("can't stub method on frozen object: #{mocha_inspect}", caller)
  end
  expectation = nil
  mockery = Mocha::Mockery.instance
  iterator = ArgumentIterator.new(stubbed_methods_vs_return_values)
  iterator.each do |*args|
    method_name = args.shift
    mockery.on_stubbing(self, method_name)
    method = stubba_method.new(stubba_object, method_name)
    mockery.stubba.stub(method)
    expectation = mocha.stubs(method_name, caller)
    expectation.returns(args.shift) unless args.empty?
  end
  expectation
end
unstub(*method_names) click to toggle source

Removes the specified stubbed methods (added by calls to {#expects} or {#stubs}) and all expectations associated with them.

Restores the original behaviour of the methods before they were stubbed. This is normally done automatically at the end of each test, but in some circumstances you may want to do it before the end of the test.

WARNING: If you {#unstub} a method which still has unsatisfied expectations, you may be removing the only way those expectations can be satisfied. Use {#unstub} with care.

@param [Array<Symbol>] method_names names of methods to unstub.

@example Stubbing and unstubbing a method on a real (non-mock) object.

multiplier = Multiplier.new
multiplier.double(2) # => 4
multiplier.stubs(:double).raises # new behaviour defined
multiplier.double(2) # => raises exception
multiplier.unstub(:double) # original behaviour restored
multiplier.double(2) # => 4

@example Unstubbing multiple methods on a real (non-mock) object.

multiplier.unstub(:double, :triple)

# exactly equivalent to

multiplier.unstub(:double)
multiplier.unstub(:triple)
# File lib/mocha/object_methods.rb, line 161
def unstub(*method_names)
  mockery = Mocha::Mockery.instance
  method_names.each do |method_name|
    method = stubba_method.new(stubba_object, method_name)
    mockery.stubba.unstub(method)
  end
end