Fix List<ParameterValue> regex

CHANGELOG.md

@@ -6,6 +6,7 @@ and this project adheres to [Semantic
 Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+- Merge PR #96, fix invalid List<ParameterValue> validation
 
 ## [1.3.4] - 2017-11-19
 ### Changed

src/test/validatorTest.ts

@@ -490,6 +490,13 @@ describe('validator', () => {
             expect(result['errors']['crit'][0]).to.have.property('message', 'Required property FunctionName missing for type AWS::Lambda::Version');
             expect(result['errors']['crit'][1]).to.have.property('message', 'Required property FunctionName missing for type AWS::Lambda::Version');
         });
+
+        it('a list of an extended parameter type should be properly mocked without causing an exception', () => {
+            const input = 'testData/valid/yaml/issue-94-list-security-group.yaml';
+            let result = validator.validateFile(input);
+            expect(result).to.have.deep.property('templateValid', true);
+            expect(result['errors']['crit']).to.have.lengthOf(0);
+        })
     });
 
     describe('parameters-validation', () => {

src/validator.ts

@@ -206,7 +206,7 @@ function guessParameterValue(parameterName: string, parameter: any): string | st
     } else {
         const rawParameterType = parameter['Type'];
 
-        const listMatch = /^List<(\w+)>$/.exec(rawParameterType);
+        const listMatch = /^List<(.+)>$/.exec(rawParameterType);
         let isList: boolean;
         let parameterType: string;
 

testData/valid/yaml/issue-94-list-security-group.yaml

@@ -0,0 +1,7 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Parameters:
+  ExistingSecurityGroups:
+    Type: List<AWS::EC2::SecurityGroup::Id>
+Resources:
+  Bucket:
+    Type: AWS::S3::Bucket