fix(cloudformation): allow empty string in parameter (#175)

Allow empty string to be passed in as parameters

Author: rongyamazon

packages/core/src/awsService/cloudformation/stacks/actions/stackActionInputValidation.ts

@@ -57,10 +57,6 @@ export function validateChangeSetName(value: string): string | undefined {
 }
 
 export function validateParameterValue(input: string, param: TemplateParameter): string | undefined {
-    if (!input && !param.Default) {
-        return `Parameter ${param.name} is required`
-    }
-
     const actualValue = input ?? param.Default?.toString() ?? ''
 
     // Handle CommaDelimitedList validation

packages/core/src/test/awsService/cloudformation/stacks/actions/stackActionInputValidation.test.ts

@@ -66,6 +66,15 @@ describe('validateParameterValue', function () {
             assert.strictEqual(validateParameterValue('2', param), undefined)
             assert.strictEqual(validateParameterValue('3', param), 'Value must be one of: 1, 2')
         })
+
+        it('should handle empty string values', function () {
+            const param: TemplateParameter = {
+                name: 'TestParam',
+                Type: 'String',
+            }
+
+            assert.strictEqual(validateParameterValue('', param), undefined)
+        })
     })
 
     describe('Number parameters', function () {