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

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

1 files changed, 52 insertions, 0 deletions

diff --git a/cli/tests/unit_node/_fs/_fs_copy_test.ts b/cli/tests/unit_node/_fs/_fs_copy_test.ts
new file mode 100644
index 000000000..b08e8d7f3
--- /dev/null
+++ b/cli/tests/unit_node/_fs/_fs_copy_test.ts
@@ -0,0 +1,52 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+import * as path from "../../../../test_util/std/path/mod.ts";
+import { assert } from "../../../../test_util/std/testing/asserts.ts";
+import { assertCallbackErrorUncaught } from "../_test_utils.ts";
+import { copyFile, copyFileSync, existsSync } from "node:fs";
+
+const destFile = "./destination.txt";
+
+Deno.test({
+  name: "[std/node/fs] copy file",
+  fn: async () => {
+    const sourceFile = Deno.makeTempFileSync();
+    const err = await new Promise((resolve) => {
+      copyFile(sourceFile, destFile, (err?: Error | null) => resolve(err));
+    });
+    assert(!err);
+    assert(existsSync(destFile));
+    Deno.removeSync(sourceFile);
+    Deno.removeSync(destFile);
+  },
+});
+
+Deno.test({
+  name: "[std/node/fs] copy file sync",
+  fn: () => {
+    const sourceFile = Deno.makeTempFileSync();
+    copyFileSync(sourceFile, destFile);
+    assert(existsSync(destFile));
+    Deno.removeSync(sourceFile);
+    Deno.removeSync(destFile);
+  },
+});
+
+Deno.test("[std/node/fs] copyFile callback isn't called twice if error is thrown", async () => {
+  // The correct behaviour is not to catch any errors thrown,
+  // but that means there'll be an uncaught error and the test will fail.
+  // So the only way to test this is to spawn a subprocess, and succeed if it has a non-zero exit code.
+  // (assertRejects won't work because there's no way to catch the error.)
+  const tempDir = await Deno.makeTempDir();
+  const tempFile1 = path.join(tempDir, "file1.txt");
+  const tempFile2 = path.join(tempDir, "file2.txt");
+  await Deno.writeTextFile(tempFile1, "hello world");
+  const importUrl = new URL("node:fs", import.meta.url);
+  await assertCallbackErrorUncaught({
+    prelude: `import { copyFile } from ${JSON.stringify(importUrl)}`,
+    invocation: `copyFile(${JSON.stringify(tempFile1)},
+                          ${JSON.stringify(tempFile2)}, `,
+    async cleanup() {
+      await Deno.remove(tempDir, { recursive: true });
+    },
+  });
+});