Added plugin tests

test/plugins.js

@@ -0,0 +1,34 @@
+var Database = require('../index.js');
+var Model = Database.Model;
+var Instance = Database.Instance;
+var should = require('should');
+
+describe('plugins', function() {
+	describe('custom validation', function() {
+		var plugin = {
+			validate: function(schema, value) {
+				if(schema == 'Positive')
+					return this.assert(value >= 0, 'positive number');
+			}
+		};
+
+		it('should correctly validate models upon creation', function(done) {
+			var model = new Model({
+				plugins: [plugin],
+				db: {
+					collection: function() { return null; }
+				}
+			}, 'collection',
+			{ name: String, age: 'Positive'	},
+			{});
+
+			model.insert({
+				name: 'test', age: -1
+			}, function(err, instance) {
+				should.exist(err);
+				should.not.exist(instance);
+				done();
+			});
+		});
+	});
+});