RSpec-AnyInstance.md

Pattern: Use of globally stubbed instance

Issue: -

Description

Checks that instances are not being stubbed globally.

Prefer instance doubles over stubbing any instance of a class

Examples

# bad
describe MyClass do
  before { allow_any_instance_of(MyClass).to receive(:foo) }
end

# good
describe MyClass do
  let(:my_instance) { instance_double(MyClass) }

  before do
    allow(MyClass).to receive(:new).and_return(my_instance)
    allow(my_instance).to receive(:foo)
  end
end

Further Reading

• RSpec - RSpec/AnyInstance
• http://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/AnyInstance