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import { describe, it, expect } from "bun:test";
import { gcTick } from "./gc";
describe("Bun.mmap", async () => {
await gcTick();
const path = `/tmp/bun-mmap-test_${Math.random()}.txt`;
await gcTick();
await Bun.write(path, "hello");
await gcTick();
it("mmap finalizer", async () => {
let map = Bun.mmap(path);
await gcTick();
const map2 = Bun.mmap(path);
map = null;
await gcTick();
});
it("mmap passed to other syscalls", async () => {
const map = Bun.mmap(path);
await gcTick();
await Bun.write(path + "1", map);
await gcTick();
const text = await (await Bun.file(path + "1")).text();
await gcTick();
expect(text).toBe(new TextDecoder().decode(map));
});
it("mmap sync", async () => {
const map = Bun.mmap(path);
await gcTick();
const map2 = Bun.mmap(path);
await gcTick();
const old = map[0];
await gcTick();
map[0] = 0;
await gcTick();
expect(map2[0]).toBe(0);
map2[0] = old;
await gcTick();
expect(map[0]).toBe(old);
await gcTick();
await Bun.write(path, "olleh");
await gcTick();
expect(new TextDecoder().decode(map)).toBe("olleh");
await gcTick();
});
it("mmap private", async () => {
await gcTick();
const map = Bun.mmap(path, { shared: true });
await gcTick();
const map2 = Bun.mmap(path, { shared: false });
await gcTick();
const old = map[0];
await gcTick();
map2[0] = 0;
await gcTick();
expect(map2[0]).toBe(0);
await gcTick();
expect(map[0]).toBe(old);
await gcTick();
});
});
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