Add navigationBar test

Author: andrewbranch

.vscode/settings.json

@@ -8,5 +8,6 @@
     "eslint.options": {
         "rulePaths": ["./scripts/eslint/built/rules/"],
         "ext": [".ts"]
-    }
+    },
+    "typescript.tsdk": "built/local"
 }

tests/cases/fourslash/navigationBarWellKnownSymbolExpando.ts

@@ -0,0 +1,53 @@
+/// <reference path="fourslash.ts"/>
+
+////function f() {}
+////f[Symbol.iterator] = function() {}
+
+verify.navigationTree({
+  "text": "<global>",
+  "kind": "script",
+  "childItems": [
+    {
+      "text": "f",
+      "kind": "class",
+      "childItems": [
+        {
+          "text": "constructor",
+          "kind": "constructor"
+        },
+        {
+          "text": "[Symbol.iterator]",
+          "kind": "function"
+        }
+      ]
+    }
+  ]
+});
+
+verify.navigationBar([
+  {
+    "text": "<global>",
+    "kind": "script",
+    "childItems": [
+      {
+        "text": "f",
+        "kind": "class"
+      }
+    ]
+  },
+  {
+    "text": "f",
+    "kind": "class",
+    "childItems": [
+      {
+        "text": "constructor",
+        "kind": "constructor"
+      },
+      {
+        "text": "[Symbol.iterator]",
+        "kind": "function"
+      }
+    ],
+    "indent": 1
+  }
+]);