Feature: Global namespace DSL RSpec has a few top-level constructs that allow you to begin describing behaviour: * `RSpec.describe`: Define a named context for a group of examples. * `RSpec.shared_examples`: Define a set of shared examples that can later be included in an example group. * `RSpec.shared_context`: define some common context (using `before`, `let`, helper methods, etc) that can later be included in an example group. Historically, these constructs have been available directly off of the main object, so that you could use these at the start of a file without the `RSpec.` prefix. They have also been available off of any class or module so that you can scope your examples within a particular constant namespace. RSpec 3 now provides an option to disable this global monkey patching: ```ruby config.expose_dsl_globally = false ``` For backwards compatibility it defaults to `true`. @allow-should-syntax Scenario: By default RSpec allows the DSL to be used globally Given a file named "spec/example_spec.rb" with: """ruby describe "specs here" do it "passes" do end end """ When I run `rspec` Then the output should contain "1 example, 0 failures" @allow-should-syntax Scenario: By default rspec/autorun allows the DSL to be used globally Given a file named "spec/example_spec.rb" with: """ruby require 'rspec/autorun' describe "specs here" do it "passes" do end end """ When I run `ruby spec/example_spec.rb` Then the output should contain "1 example, 0 failures" Scenario: When exposing globally is disabled the top level DSL no longer works Given a file named "spec/example_spec.rb" with: """ruby RSpec.configure { |c| c.expose_dsl_globally = false } describe "specs here" do it "passes" do end end """ When I run `rspec` Then the output should contain "undefined method `describe'" Scenario: Regardless of setting Given a file named "spec/example_spec.rb" with: """ruby RSpec.configure { |c| c.expose_dsl_globally = true } RSpec.describe "specs here" do it "passes" do end end """ When I run `rspec` Then the output should contain "1 example, 0 failures"