how to stub private methods ?

[Arup Rakshit]

I have the below code :

class Foo

  def intialize

    #

  end

  def meth

    OpenStruct.new(val : meth1, val: meth2)

  end

  private

  def meth1

    #..

  end

  def meth2

    #..

  end

end

How can I stub those 2 private methods *meth1* and *meth2*.  *should* wouldn't work for me, as mentioned here - http://stackoverflow.com/questions/14987141/rspec-stub-private-method

[Aaron Kromer]

Arup,

Can you post your spec and exception. These should work on 2.14. If you are on RSpec 3, you need to either switch to the new syntax (https://www.relishapp.com/rspec/rspec-mocks/v/3-0/docs/basics/allowing-messages) or configure the old syntax (https://www.relishapp.com/rspec/rspec-mocks/v/3-0/docs/old-syntax).

Here is a sample with the new syntax:

    allow(obj).to receive(:message).and_return(value)

Cheers!

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[Arup Rakshit]

On Thursday, July 3, 2014 9:49:56 PM UTC+5:30, Aaron Kromer wrote:

Arup,

Can you post your spec and exception. These should work on 2.14. If you are on RSpec 3, you need to either switch to the new syntax (https://www.relishapp.com/rspec/rspec-mocks/v/3-0/docs/basics/allowing-messages) or configure the old syntax (https://www.relishapp.com/rspec/rspec-mocks/v/3-0/docs/old-syntax).

Here is a sample with the new syntax:

    allow(obj).to receive(:message).and_return(value)

Cheers

Code :-

#!/usr/bin/env ruby

require 'ostruct'

class Foo

  def intialize

  #..

  end

  def meth

    OpenStruct.new(suml: sum, mul: multiplication)

  end

  private

  def sum(enum)

    enum.inject(:+)

  end

  def multiplication(enum)

    enum.inject(:*) 

  end

end

Rspec :

require_relative "../test.rb"

describe Foo do

  before do

    subject.should_receive(:sum).and_return(12)

    subject.should_receive(:multiplication)

  end

  describe "#meth" do

    it "return an OpenStruct instance" do

      expect(subject.meth).to be_instance_of(OpenStruct)

    end

  end

end

And finally -

arup@linux-wzza:~/Ruby> rspec  spec/test_spec.rb

.

Deprecation Warnings:

Using `should_receive` from rspec-mocks' old `:should` syntax without explicitly enabling the syntax is deprecated. Use the new `:expect` syntax or explicitly enable `:should` instead. Called from /home/arup/Ruby/spec/test_spec.rb:5:in `block (2 levels) in <top (required)>'.

If you need more of the backtrace for any of these deprecations to

identify where to make the necessary changes, you can configure

`config.raise_errors_for_deprecations!`, and it will turn the

deprecation warnings into errors, giving you the full backtrace.

1 deprecation warning total

Finished in 0.00175 seconds (files took 0.13547 seconds to load)

1 example, 0 failures

 

[Aaron Kromer]

That’s stating your spec passed. Meaning it recognized your stub syntax. However, you have not explicitly configured the “should” syntax. RSpec is warning you that you should take action to correct this. The message is giving you two options:

• Use the new expect syntax (https://www.relishapp.com/rspec/rspec-mocks/v/3-0/docs/basics/allowing-messages)
• Explicitly configure the should syntax (https://www.relishapp.com/rspec/rspec-mocks/v/3-0/docs/old-syntax)

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[Arup Rakshit]

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> > https://groups.google.com/d/msgid/rspec/64c0b722-7585-4903-8926-5a4d350a55
> > b3%40googlegroups.com

> > <https://groups.google.com/d/msgid/rspec/64c0b722-7585-4903-8926-5a4d350a
> > 55b3%40googlegroups.com?utm_medium=email&utm_source=footer> .

> >
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Yes `allow` is working correctly.

require_relative "../test.rb"

describe Foo do
before do

allow(subject).to receive(:sum).and_return(12)
allow(subject).to receive(:multiplication).and_return(1)

end

describe "#meth" do
it "return an OpenStruct instance" do
expect(subject.meth).to be_instance_of(OpenStruct)
end
end
end

The above code is working. Thanks for your help.

--
================
Regards,
Arup Rakshit
================
Debugging is twice as hard as writing the code in the first place. Therefore,
if you write the code as cleverly as possible, you are, by definition, not
smart enough to debug it.

--Brian Kernighan

[Arup Rakshit]

On Thursday, July 03, 2014 03:51:24 PM Aaron Kromer wrote:
> That's stating your spec passed. Meaning it recognized your stub syntax.
> However, you have not explicitly configured the "should" syntax. RSpec is
> warning you that you should take action to correct this. The message is
> giving you two options:
>

From the http://stackoverflow.com/questions/14987141/rspec-stub-private-method

I found -

@foo.should_receive(:start_training).exactly(2).times

From relish doc I found

expect(obj).to respond_to(:foo).with(1).argument

Where those *times*, *exactly*, *argument*, *arguments* methods are
documented.. I am not finding it... I want to see, what else such varieties are
present ?

[Arup Rakshit]

> From the
> http://stackoverflow.com/questions/14987141/rspec-stub-private-method
>
> I found -
>
> @foo.should_receive(:start_training).exactly(2).times
>
> From relish doc I found
>
> expect(obj).to respond_to(:foo).with(1).argument
>
> Where those *times*, *exactly*, *argument*, *arguments* methods are
> documented.. I am not finding it... I want to see, what else such varieties
> are present ?

Just found it http://rubydoc.info/gems/rspec-expectations/RSpec/Matchers/BuiltIn/RespondTo#argument-instance_method

and

http://rubydoc.info/gems/rspec-expectations/RSpec/Matchers/BuiltIn/YieldControl#exactly-instance_method

:)