Service Virtualization

Hello,

I am writing a small match script in JavaScript.

So far I have successfully

• assigned variables to values from incomingRequest
• assigned variables to values from sourceRequest
• writing the variables to the vse log to see I am grabbing the right data

But then I am clearly missing some basic piece of understanding.  When I try a small conditional:

if ( plant !=="1010") {

  return false;

} else if ( mode == src_mode && grid1 == src_grid1 && grid2 == src_grid2){

  return true;

} else {

  return defaultMatcher.Matches();

}

DevTest tells me neither the 'return true' nor the 'return false' are valid returns.  But as match scripts return Booleans, I am now confused.

Thanks in advance for any help received.

Is the following a typo ?

if ( plant !=="1010") { => this should be if ( plant !="1010") {

I believe the '!==' operator is 'not equal value nor equal type'. 

But I could split that out into two checks, and try the not-equal operator by itself and see if that changes the result.

Changing the operator to just not equal still gives the 'invalid return' error warning.

But thanks for the idea.

Any other suggestions?

what you are trying to do with script in match script area ? if you can tel me the purpose I can tell you if that is possible to implement in any other way..

I am trying to do a couple of things.

The virtual service listens on the same JMS nodes as several other services.  I need to prevent it from responding to requests that are not from plant 1010.

The signature matching is otherwise TOO restrictive; there are many elements in the meta that will not match on valid message matches. 

Thanks for your help.

I see another typo

return defaultMatcher.Matches();

needs to be

return defaultMatcher.matches();

If I treat the code as ordinary JavaScript, sticking the snippet in a function context gets rid of the error.

function match (plant, mode, grid1, grid2, src_mode,src_grid1,src_grid2) {

if ( plant!=="1010") {

  return false;

  } else if ( mode == src_mode && grid1 == src_grid1 && grid2 == src_grid2){

  return true;

  } else {

  return defaultMatcher.Matches();

  }

But the documentation for Match Scripts has examples with no functions defined, and I tried to follow the example. So I feel I am still missing something fundamental.

I welcome any and all clues. :-)

I see   return defaultMatcher.Matches(); in your code, if you check the example, the correct API call is return defaultMatcher.matches();

Corrected. :-)

Did it fix your issue?

Problem likely is that JavaScript does not support the concept of explicit return values (such as 'return false;') outside of functions. Try using other supported scripting languages such as Beanshell or Groovy instead.

In JavaScript try the following code instead:

if ( plant !=="1010") {

       plant.equals("1010");

} else if ( mode == src_mode && grid1 == src_grid1 && grid2 == src_grid2){

       plant.equals("1010");

} else {

       defaultMatcher.matches();

}

Thanks.  I am not sure I can learn Beanshell or Groovy in the time I have for this project, but it will go on my to do list. For now, I will see if using JavaScript functions will work.

Also, thanks for the excellent guide to scripting. It was concise and thorough enough to get started quickly.

Please see my updated last response with a JavaScript sample that might work.

Thank you very much. I will give that a spin later tonight. :-)

Did this suggestion resolve your issue?

Ulrich,

Moving everything into functions resolved the issue, yes.  Thanks for your help. ☺

Greg

HI Ulrich,

i too facing the same issue, i have placed my code below. how to return a boolean value based on the IF condition in Java Script. Based on this assertion (True/False) i need to perform other operations. Please help on this

if(testExec.getStateValue("ResponseValue1").equals(testExec.getStateValue("Expected_Result1")))
{
Return True;
}
else
{
Return False;
} 

This is a duplicate of https://communities.ca.com/message/241976265?commentID=241976265#comment-241976265 

JavaScript does not have a concept of a ‘return’ statement outside of functions. The return value of a JavaScript is the value of the expression evaluated last.

Instead of the entire if statement, I suggest to try 

testExec.getStateValue("ResponseValue1").equals(testExec.getStateValue("Expected_Result1"))

and see if that works.

Please see DevTest 8.0 - Scripting Guide - V1.1.pdf  for more details and some guidance.