Fix InvalidTypeError message

Author: mikunn

lib/converters/schema.js

@@ -67,7 +67,7 @@ function validateType(type) {
 	var validTypes = ['integer', 'number', 'string', 'boolean', 'object', 'array'];
 
 	if (validTypes.indexOf(type) < 0 && type !== undefined) {
-		throw new InvalidTypeError('Type "' + type + '" is not a valid type');
+		throw new InvalidTypeError('Type ' + JSON.stringify(type) + ' is not a valid type');
 	}
 }
 

lib/errors/invalid-type-error.js

@@ -5,5 +5,5 @@ function InvalidTypeError(message) {
 	this.message = message;
 }
 
-InvalidTypeError.prototype = new Error();
+InvalidTypeError.prototype = Error.prototype;
 

test/invalid_types.test.js

@@ -6,7 +6,7 @@ var test = require('tape')
 test('invalid types', function(assert) {
 	var schema, msg;
 
-	assert.plan(3);
+	assert.plan(4);
 
 	schema = {
 		type: 'dateTime'
@@ -22,6 +22,12 @@ test('invalid types', function(assert) {
 	msg = 'foo is invalid type';
 	assert.throws(function() { convert(schema); }, /InvalidTypeError/, msg);
 
+	schema = {
+		type: ['string', null]
+	};
+
+	assert.throws(function() { convert(schema); }, /InvalidTypeError.*["string",null]/, msg);
+
 	schema = getSchema('schema-2-invalid-type.json');
 
 	msg = 'invalid type inside complex schema';