test for module importing itself

test/function/cannot-import-self/_config.js

@@ -0,0 +1,8 @@
+var assert = require( 'assert' );
+
+module.exports = {
+	description: 'prevents a module importing itself',
+	error: function ( err ) {
+		assert.ok( /A module cannot import itself/.test( err.message ) );
+	}
+};

test/function/cannot-import-self/main.js

@@ -0,0 +1 @@
+import me from './main';