test(ext/node): port _fs tests from std/node (#18262)

Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/cli/tests/unit_node/_fs/_fs_realpath_test.ts b/cli/tests/unit_node/_fs/_fs_realpath_test.ts
new file mode 100644
index 000000000..871ebe983
--- /dev/null
+++ b/cli/tests/unit_node/_fs/_fs_realpath_test.ts
@@ -0,0 +1,55 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+import * as path from "../../../../test_util/std/path/mod.ts";
+import { assertEquals } from "../../../../test_util/std/testing/asserts.ts";
+import { assertCallbackErrorUncaught } from "../_test_utils.ts";
+import { realpath, realpathSync } from "node:fs";
+
+Deno.test("realpath", async function () {
+  const tempFile = await Deno.makeTempFile();
+  const tempFileAlias = tempFile + ".alias";
+  await Deno.symlink(tempFile, tempFileAlias);
+  const realPath = await new Promise((resolve, reject) => {
+    realpath(tempFile, (err, path) => {
+      if (err) {
+        reject(err);
+        return;
+      }
+      resolve(path);
+    });
+  });
+  const realSymLinkPath = await new Promise((resolve, reject) => {
+    realpath(tempFileAlias, (err, path) => {
+      if (err) {
+        reject(err);
+        return;
+      }
+      resolve(path);
+    });
+  });
+  assertEquals(realPath, realSymLinkPath);
+});
+
+Deno.test("realpathSync", function () {
+  const tempFile = Deno.makeTempFileSync();
+  const tempFileAlias = tempFile + ".alias";
+  Deno.symlinkSync(tempFile, tempFileAlias);
+  const realPath = realpathSync(tempFile);
+  const realSymLinkPath = realpathSync(tempFileAlias);
+  assertEquals(realPath, realSymLinkPath);
+});
+
+Deno.test("[std/node/fs] realpath callback isn't called twice if error is thrown", async () => {
+  const tempDir = await Deno.makeTempDir();
+  const tempFile = path.join(tempDir, "file.txt");
+  const linkFile = path.join(tempDir, "link.txt");
+  await Deno.writeTextFile(tempFile, "hello world");
+  await Deno.symlink(tempFile, linkFile, { type: "file" });
+  const importUrl = new URL("node:fs", import.meta.url);
+  await assertCallbackErrorUncaught({
+    prelude: `import { realpath } from ${JSON.stringify(importUrl)}`,
+    invocation: `realpath(${JSON.stringify(`${tempDir}/link.txt`)}, `,
+    async cleanup() {
+      await Deno.remove(tempDir, { recursive: true });
+    },
+  });
+});