add tests for trivia

tests/cases/fourslash/unusedClassInNamespaceWithTrivia.ts

@@ -0,0 +1,11 @@
+/// <reference path='fourslash.ts' />
+
+// @noUnusedLocals: true
+//// [| namespace greeter {
+////   /* comment1 */
+////   class /* comment2 */ class1 {
+////   }
+//// } |]
+
+verify.rangeAfterCodeFix(`namespace greeter {
+}`, /*includeWhiteSpace*/ false, /*errorCode*/ undefined, /*index*/ 0);

tests/cases/fourslash/unusedClassInNamespaceWithTriviaAddUnderscore.ts

@@ -0,0 +1,14 @@
+/// <reference path='fourslash.ts' />
+
+// @noUnusedLocals: true
+//// [| namespace greeter {
+////   /* comment1 */
+////   class /* comment2 */ class1 {
+////   }
+//// } |]
+
+verify.rangeAfterCodeFix(`namespace greeter {
+    /* comment1 */
+    class /* comment2 */ _class1 {
+    }
+}`, /*includeWhiteSpace*/ false, /*errorCode*/ undefined, /*index*/ 1);