Add fourslash test for in scope completion

Author: JsonFreeman

tests/cases/fourslash/completionWithNamespaceInsideFunction.ts

@@ -0,0 +1,24 @@
+/// <reference path='fourslash.ts'/>
+
+////function f() {
+////    namespace n {
+////        interface I {
+////            x: number
+////        }
+////        /*1*/
+////    }
+////    /*2*/
+////}
+/////*3*/
+
+goTo.marker('1');
+verify.completionListContains("f", "function f(): void");
+verify.completionListContains("n", "namespace n");
+verify.completionListContains("I", "interface I");
+
+goTo.marker('2');
+verify.completionListContains("f", "function f(): void");
+verify.completionListContains("n", "namespace n");
+
+goTo.marker('3');
+verify.completionListContains("f", "function f(): void");