1 files changed, 26 insertions, 0 deletions
diff --git a/std/node/_fs/_fs_appendFile_test.ts b/std/node/_fs/_fs_appendFile_test.ts
index ca48dc5d3..402ac1c10 100644
--- a/std/node/_fs/_fs_appendFile_test.ts
+++ b/std/node/_fs/_fs_appendFile_test.ts
@@ -2,6 +2,7 @@
 const { test } = Deno;
 import { assertEquals, assertThrows, fail } from "../../testing/asserts.ts";
 import { appendFile, appendFileSync } from "./_fs_appendFile.ts";
+import { fromFileUrl } from "../path.ts";
 
 const decoder = new TextDecoder("utf-8");
 
@@ -110,6 +111,31 @@ test({
 });
 
 test({
+  name: "Async: Data is written to passed in URL",
+  async fn() {
+    const openResourcesBeforeAppend: Deno.ResourceMap = Deno.resources();
+    const fileURL = new URL("_fs_appendFile_test_file.txt", import.meta.url);
+    await new Promise((resolve, reject) => {
+      appendFile(fileURL, "hello world", (err) => {
+        if (err) reject(err);
+        else resolve();
+      });
+    })
+      .then(async () => {
+        assertEquals(Deno.resources(), openResourcesBeforeAppend);
+        const data = await Deno.readFile(fromFileUrl(fileURL));
+        assertEquals(decoder.decode(data), "hello world");
+      })
+      .catch((err) => {
+        fail("No error was expected: " + err);
+      })
+      .finally(async () => {
+        await Deno.remove(fromFileUrl(fileURL));
+      });
+  },
+});
+
+test({
   name:
     "Async: Callback is made with error if attempting to append data to an existing file with 'ax' flag",
   async fn() {