check for IsConstructCall

refs #29

src/database.cc

@@ -105,7 +105,7 @@ void Database::Schedule(EIO_Callback callback, Baton* baton, bool exclusive) {
 Handle<Value> Database::New(const Arguments& args) {
     HandleScope scope;
 
-    if (!Database::HasInstance(args.This())) {
+    if (!args.IsConstructCall()) {
         return ThrowException(Exception::TypeError(
             String::New("Use the new operator to create new Database objects"))
         );

test/database_fail.test.js

 var sqlite3 = require('sqlite3');
 var assert = require('assert');
 
+exports['test Database() without new'] = function(beforeExit) {
+    assert.throws(function() {
+        sqlite3.Database(':memory:');
+    }, (/Use the new operator to create new Database objects/));
+};
+
 exports['test Database#get prepare fail'] = function(beforeExit) {
     var db = new sqlite3.Database(':memory:');