test :required for arguments

spec/features/required_arguments_and_options_spec.cr

@@ -0,0 +1,19 @@
+require "../spec_helper"
+
+module Optarg::RequiredArgumentsAndOptionsFeature
+  class Compile < Optarg::Model
+    arg "source_file", required: true
+  end
+
+  it "Required Arguments" do
+    expect_raises(Optarg::RequiredError) { Compile.parse %w() }
+  end
+
+  class Profile < Optarg::Model
+    string "--birth", required: true
+  end
+
+  it "Required Options" do
+    expect_raises(Optarg::RequiredError) { Profile.parse %w() }
+  end
+end