matcher_spec.rb

# This spec works on RSpec 2.99 but not on 3.0.

class Model
  attr_reader :attributes

  def initialize(attributes)
    @attributes = attributes
  end

  def ==(other)
    Model === other and @attributes == other.attributes
  end
end

describe "mocking" do
  let(:model) { Model.new(id: 1, username: "jcoglan") }

  it "literally matches" do
    should_receive(:puts).with(Model.new(id: 1, username: "jcoglan"))
    puts model
  end

  it "matches with a type mathcer" do
    should_receive(:puts).with(Model.new(id: 1, username: instance_of(String)))
    puts model
  end

  it "matches with a hash matcher" do
    should_receive(:puts).with(Model.new(hash_including(id: 1)))
    puts model
  end

  it "matches with composed hash and type matchers" do
    should_receive(:puts).with(Model.new(hash_including(username: instance_of(String))))
    puts model
  end
end

__END__

Failures:

  1) mocking matches with a type mathcer
     Failure/Error: puts model
       #<RSpec::ExampleGroups::Mocking:0x007f9eb15da758> received :puts with unexpected arguments
         expected: (#<Model:0x007f9eb15d9560 @attributes={:id=>1, :username=>#<RSpec::Mocks::ArgumentMatchers::InstanceOf:0x007f9eb15d95b0 @klass=String>}>)
              got: (#<Model:0x007f9eb15d93a8 @attributes={:id=>1, :username=>"jcoglan"}>)
     # ./foo_spec.rb:23:in `block (2 levels) in <top (required)>'

  2) mocking matches with a hash matcher
     Failure/Error: puts model
       #<RSpec::ExampleGroups::Mocking:0x007f9eb15d32f0> received :puts with unexpected arguments
         expected: (#<Model:0x007f9eb15d2058 @attributes=#<RSpec::Mocks::ArgumentMatchers::HashIncludingMatcher:0x007f9eb15d2080 @expected={:id=>1}>>)
              got: (#<Model:0x007f9eb15d1f40 @attributes={:id=>1, :username=>"jcoglan"}>)
     # ./foo_spec.rb:28:in `block (2 levels) in <top (required)>'

  3) mocking matches with composed hash and type matchers
     Failure/Error: puts model
       #<RSpec::ExampleGroups::Mocking:0x007f9eb15d0a28> received :puts with unexpected arguments
         expected: (#<Model:0x007f9eb15cbb40 @attributes=#<RSpec::Mocks::ArgumentMatchers::HashIncludingMatcher:0x007f9eb15cbb68 @expected={:username=>#<RSpec::Mocks::ArgumentMatchers::Instance
Of:0x007f9eb15cbc08 @klass=String>}>>)
              got: (#<Model:0x007f9eb15cba28 @attributes={:id=>1, :username=>"jcoglan"}>)
     # ./foo_spec.rb:33:in `block (2 levels) in <top (required)>'