Parameters:
  Sqs:
    Type: String
    Default: ""
Conditions:
  isSqs: !Not [!Equals [!Ref Sqs, ""]]
Resources:
  EventSourceValue:
    Type: AWS::Lambda::EventSourceMapping
    Properties:
      FunctionName: Test
      EventSourceArn: "arn:aws:sqs:test"
      StartingPosition: LATEST
  EventSourceValueWithCondition:
    Type: AWS::Lambda::EventSourceMapping
    Properties:
      FunctionName: Test
      EventSourceArn:
        !If [isSqs, "arn:aws:kinesis:test", "arn:aws:sqs:test"]
      StartingPosition: !If [isSqs, "LATEST", "LATEST"]
  MySqs:
    Type: AWS::SQS::Queue
    Properties: {}
  EventSourceRef:
    Type: AWS::Lambda::EventSourceMapping
    Properties:
      FunctionName: Test
      EventSourceArn: !GetAtt MySqs.Arn
      StartingPosition: LATEST