fix(BunFile.slice) fix slice when length is greater than the size (#5186)

* check the limits for file, when slicing

* check eof

* undo test

1 files changed, 10 insertions, 0 deletions

diff --git a/test/js/bun/io/bun-write.test.js b/test/js/bun/io/bun-write.test.js
index f435d2ceb..a05fa283a 100644
--- a/test/js/bun/io/bun-write.test.js
+++ b/test/js/bun/io/bun-write.test.js
@@ -300,6 +300,16 @@ it("offset should work #4963", async () => {
   expect(contents).toBe("ntents");
 });
 
+it("length should be limited by file size #5080", async () => {
+  const filename = tmpdir() + "/bun.test.offset2.txt";
+  await Bun.write(filename, "contents");
+  const file = Bun.file(filename);
+  const slice = file.slice(2, 1024);
+  const contents = await slice.text();
+  expect(contents).toBe("ntents");
+  expect(contents.length).toBeLessThanOrEqual(file.size);
+});
+
 it("#2674", async () => {
   const file = path.join(import.meta.dir, "big-stdout.js");