Added additional test verification

Author: rbuckton

tests/cases/fourslash/signatureHelpCallExpressionJs.ts

@@ -6,10 +6,12 @@
 // @Filename: main.js
 ////function fnTest() { arguments; }
 ////fnTest(/*1*/);
+////fnTest(1, 2, 3);
 
 goTo.marker('1');
 verify.signatureHelpCountIs(1);
 verify.currentSignatureParameterCountIs(1);
 verify.currentSignatureHelpIs('fnTest(...args: any[]): void');
 verify.currentParameterHelpArgumentNameIs('args');
-verify.currentParameterSpanIs("...args: any[]");
+verify.currentParameterSpanIs("...args: any[]");
+verify.numberOfErrorsInCurrentFile(0);