Switch statement doesn't seem to work in Javascript Policy

[prabhup1]

I have a Javascript policy with the following code:

var scenario = context.proxyRequest.queryParams['scenario'];
switch (scenario) {
case "abc":
  print("Case is abc");
  break;
case "xyz":
  print("Case is xyz");
  break;
default:
  print("No Match: The value of scenario is: " + scenario);
}

My URL is https://abc.com/test?scenario=abc

I am finding that the code falls into the "Default" path and it prints:

No Match: The value of scenario is: abc

so it confirms that the query parameter was properly extracted and put into the variable scenario.

If so then why doesn't the case: "abc" path get executed? Why does it take the default path?

I hardcoded the value of variable scenario as follows:

var scenario = "abc"

In this case it does go to the case" "abc" path.

Why does it work in the latter case but not in the former case?