diff options
| -rw-r--r-- | ext/fs/30_fs.js | 1 | ||||
| -rw-r--r-- | tests/unit/write_file_test.ts | 18 |
2 files changed, 19 insertions, 0 deletions
diff --git a/ext/fs/30_fs.js b/ext/fs/30_fs.js index 3a35749d8..183e51e50 100644 --- a/ext/fs/30_fs.js +++ b/ext/fs/30_fs.js @@ -926,6 +926,7 @@ async function writeFile( append: options.append ?? false, create: options.create ?? true, createNew: options.createNew ?? false, + truncate: !(options.append ?? false), write: true, }); await data.pipeTo(file.writable, { diff --git a/tests/unit/write_file_test.ts b/tests/unit/write_file_test.ts index 6cd08e2d1..29780446c 100644 --- a/tests/unit/write_file_test.ts +++ b/tests/unit/write_file_test.ts @@ -425,3 +425,21 @@ Deno.test( assertEquals(Deno.readFileSync(filename), new Uint8Array([1, 2])); }, ); + +Deno.test( + { permissions: { read: true, write: true } }, + async function overwriteFileWithStream() { + const filename = Deno.makeTempDirSync() + "/test.txt"; + await Deno.writeFile(filename, new Uint8Array([1, 2, 3, 4])); + + const stream = new ReadableStream({ + pull(controller) { + controller.enqueue(new Uint8Array([1])); + controller.enqueue(new Uint8Array([2])); + controller.close(); + }, + }); + await Deno.writeFile(filename, stream); + assertEquals(Deno.readFileSync(filename), new Uint8Array([1, 2])); + }, +); |