From abd4eca2a071694a2ba8075916867d9f4dc3600a Mon Sep 17 00:00:00 2001
From: tjjfvi <44031566+tjjfvi@users.noreply.github.com>
Date: Mon, 12 Jul 2021 13:19:19 -0700
Subject: [PATCH 1/2] Fix getChildCount/At methods in EndOfFileTokens

Before, they were hardcoded to return `0` and `undefined!`, respectively, but that is inaccurate for `EndOfFileToken`s with attached jsdoc.
---
 src/services/services.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index e0877625e9385..dc1651a6fdacd 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -259,11 +259,11 @@ namespace ts {
         }
 
         public getChildCount(): number {
-            return 0;
+            return this.getChildren().length;
         }
 
-        public getChildAt(): Node {
-            return undefined!;  // TODO: GH#18217
+        public getChildAt(index: number): Node {
+            return this.getChildren()[index];
         }
 
         public getChildren(): Node[] {

From 946d39cc6f8b6e604954cd7812078f99f76a73f8 Mon Sep 17 00:00:00 2001
From: tjjfvi <tjjfvi@tjjfvi.com>
Date: Wed, 14 Jul 2021 01:36:01 -0700
Subject: [PATCH 2/2] Add tests for getChild* methods on EndOfFileTokens

---
 src/testRunner/unittests/publicApi.ts | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/testRunner/unittests/publicApi.ts b/src/testRunner/unittests/publicApi.ts
index e1400a9992c9e..883b979f9c72e 100644
--- a/src/testRunner/unittests/publicApi.ts
+++ b/src/testRunner/unittests/publicApi.ts
@@ -171,3 +171,14 @@ var x
     });
     assert.equal(5, kids.length);
 });
+
+describe("unittests:: Public APIs:: getChild* methods on EndOfFileToken with JSDoc", () => {
+    const content = `
+/** jsdoc comment attached to EndOfFileToken */
+`;
+    const sourceFile = ts.createSourceFile("/file.ts", content, ts.ScriptTarget.ESNext, /*setParentNodes*/ true);
+    const endOfFileToken = sourceFile.getChildren()[1];
+    assert.equal(endOfFileToken.getChildren().length, 1);
+    assert.equal(endOfFileToken.getChildCount(), 1);
+    assert.notEqual(endOfFileToken.getChildAt(0), /*expected*/ undefined);
+});