deps_spec: check args.

Library/Homebrew/test/.rubocop_todo.yml

@@ -83,6 +83,7 @@ RSpec/MultipleDescribes:
     - 'cmd/cleanup_spec.rb'
     - 'cmd/commands_spec.rb'
     - 'cmd/config_spec.rb'
+    - 'cmd/deps_spec.rb'
     - 'cmd/desc_spec.rb'
     - 'cmd/doctor_spec.rb'
     - 'cmd/fetch_spec.rb'

Library/Homebrew/test/cmd/deps_spec.rb

@@ -1,5 +1,11 @@
 # frozen_string_literal: true
 
+require "cmd/shared_examples/args_parse"
+
+describe "Homebrew.deps_args" do
+  it_behaves_like "parseable arguments"
+end
+
 describe "brew deps", :integration_test do
   it "outputs all of a Formula's dependencies and their dependencies on separate lines" do
     setup_test_formula "foo"