describe "brew command", :integration_test do it "returns the file for a given command" do expect { brew "command", "info" } .to output(%r{#{Regexp.escape(HOMEBREW_LIBRARY_PATH)}/cmd/info.rb}).to_stdout .and be_a_success end it "fails when the given command is unknown" do expect { brew "command", "does-not-exist" } .to output(/Unknown command/).to_stderr .and be_a_failure end end