Improve code quality and write tests

node_modules/argv/build/test.js

@@ -0,0 +1,13 @@
+global.munit = require( 'munit' );
+global.argv = require( '../' );
+
+// Only stop test suite when running make test
+if ( ! process.env.NODE_TEST_NO_SKIP ) {
+	munit.defaults.settings.stopOnFail = true;
+}
+
+// Render all tests
+munit.render( __dirname + '/../test/', {
+	junit: __dirname + '/results/',
+	junitPrefix: process.version.replace( /\./g, '_' )
+});