require "cmd/shared_examples/args_parse" describe "Homebrew.__prefix_args" do it_behaves_like "parseable arguments" end describe "brew --prefix", :integration_test do it "prints a given Formula's prefix" do expect { brew "--prefix", testball } .to output(%r{#{HOMEBREW_CELLAR}/testball}).to_stdout .and not_to_output.to_stderr .and be_a_success end end