From 5bed06fb94214db70a27cca8fa8eff717d537dba Mon Sep 17 00:00:00 2001
From: ali ahmed <48116123+AliBasicCoder@users.noreply.github.com>
Date: Wed, 14 Oct 2020 17:59:28 +0200
Subject: feat(std/fs/node): adding some functions (#7921)

---
 std/node/_fs/_fs_readdir_test.ts | 71 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 std/node/_fs/_fs_readdir_test.ts

(limited to 'std/node/_fs/_fs_readdir_test.ts')

diff --git a/std/node/_fs/_fs_readdir_test.ts b/std/node/_fs/_fs_readdir_test.ts
new file mode 100644
index 000000000..169e10245
--- /dev/null
+++ b/std/node/_fs/_fs_readdir_test.ts
@@ -0,0 +1,71 @@
+import { assertEquals, assertNotEquals, fail } from "../../testing/asserts.ts";
+import { readdir, readdirSync } from "./_fs_readdir.ts";
+import { join } from "../../path/mod.ts";
+
+Deno.test({
+  name: "ASYNC: reading empty directory",
+  async fn() {
+    const dir = Deno.makeTempDirSync();
+    await new Promise<string[]>((resolve, reject) => {
+      readdir(dir, (err, files) => {
+        if (err) reject(err);
+        resolve(files);
+      });
+    })
+      .then((files) => assertEquals(files, []))
+      .catch(() => fail())
+      .finally(() => Deno.removeSync(dir));
+  },
+});
+
+function assertEqualsArrayAnyOrder<T>(actual: T[], expected: T[]) {
+  assertEquals(actual.length, expected.length);
+  for (const item of expected) {
+    const index = actual.indexOf(item);
+    assertNotEquals(index, -1);
+    expected = expected.splice(index, 1);
+  }
+}
+
+Deno.test({
+  name: "ASYNC: reading non-empty directory",
+  async fn() {
+    const dir = Deno.makeTempDirSync();
+    Deno.writeTextFileSync(join(dir, "file1.txt"), "hi");
+    Deno.writeTextFileSync(join(dir, "file2.txt"), "hi");
+    Deno.mkdirSync(join(dir, "some_dir"));
+    await new Promise<string[]>((resolve, reject) => {
+      readdir(dir, (err, files) => {
+        if (err) reject(err);
+        resolve(files);
+      });
+    })
+      .then((files) =>
+        assertEqualsArrayAnyOrder(files, ["file1.txt", "some_dir", "file2.txt"])
+      )
+      .catch(() => fail())
+      .finally(() => Deno.removeSync(dir, { recursive: true }));
+  },
+});
+
+Deno.test({
+  name: "SYNC: reading empty the directory",
+  fn() {
+    const dir = Deno.makeTempDirSync();
+    assertEquals(readdirSync(dir), []);
+  },
+});
+
+Deno.test({
+  name: "SYNC: reading non-empty directory",
+  fn() {
+    const dir = Deno.makeTempDirSync();
+    Deno.writeTextFileSync(join(dir, "file1.txt"), "hi");
+    Deno.writeTextFileSync(join(dir, "file2.txt"), "hi");
+    Deno.mkdirSync(join(dir, "some_dir"));
+    assertEqualsArrayAnyOrder(
+      readdirSync(dir),
+      ["file1.txt", "some_dir", "file2.txt"],
+    );
+  },
+});
-- 
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