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import fs from "fs";
import { it, expect } from "bun:test";
import path from "path";
it("Bun.write('out.txt', 'string')", async () => {
for (let erase of [true, false]) {
if (erase) {
try {
fs.unlinkSync(path.join("/tmp", "out.txt"));
} catch (e) {}
}
const out = await Bun.write("/tmp/out.txt", "string");
expect(await out.text()).toBe("string");
expect(await out.text()).toBe(fs.readFileSync("/tmp/out.txt", "utf8"));
}
});
it("Bun.file -> Bun.file", async () => {
try {
fs.unlinkSync(path.join("/tmp", "fetch.js.in"));
} catch (e) {}
try {
fs.unlinkSync(path.join("/tmp", "fetch.js.out"));
} catch (e) {}
const file = path.join(import.meta.dir, "fetch.js.txt");
const text = fs.readFileSync(file, "utf8");
fs.writeFileSync("/tmp/fetch.js.in", text, { mode: 0644 });
{
const result = await Bun.write(
Bun.file("/tmp/fetch.js.out"),
Bun.file("/tmp/fetch.js.in")
);
expect(await result.text()).toBe(text);
}
{
const result = await Bun.write(
Bun.file("/tmp/fetch.js.in").slice(0, (text.length / 2) | 0),
Bun.file("/tmp/fetch.js.out")
);
expect(await result.text()).toBe(text.substring(0, (text.length / 2) | 0));
}
{
const result = await Bun.write(
"/tmp/fetch.js.in",
Bun.file("/tmp/fetch.js.out")
);
expect(await result.text()).toBe(text);
}
});
it("Bun.file", async () => {
const file = path.join(import.meta.dir, "fetch.js.txt");
expect(await Bun.file(file).text()).toBe(fs.readFileSync(file, "utf8"));
});
it("Bun.file as a Blob", async () => {
const filePath = path.join(import.meta.url, "../fetch.js.txt");
const fixture = fs.readFileSync(filePath, "utf8");
// this is a Blob object with the same interface as the one returned by fetch
// internally, instead of a byte array, it stores the file path!
// this enables several performance optimizations
var blob = Bun.file(filePath);
// no size because we haven't read it from disk yet
expect(blob.size).toBe(0);
// now it reads "./fetch.js.txt" from the filesystem
// it's lazy, only loads once we ask for it
// if it fails, the promise will reject at this point
expect(await blob.text()).toBe(fixture);
// now that it's loaded, the size updates
expect(blob.size).toBe(fixture.length);
// and it only loads once for _all_ blobs pointing to that file path
// until all references are released
expect((await blob.arrayBuffer()).byteLength).toBe(fixture.length);
const array = new Uint8Array(await blob.arrayBuffer());
const text = fixture;
for (let i = 0; i < text.length; i++) {
expect(array[i]).toBe(text.charCodeAt(i));
}
expect(blob.size).toBe(fixture.length);
blob = null;
Bun.gc(true);
await new Promise((resolve) => setTimeout(resolve, 1));
// now we're back
var blob = Bun.file(filePath);
expect(blob.size).toBe(0);
});
it("Response -> Bun.file", async () => {
const file = path.join(import.meta.dir, "fetch.js.txt");
const text = fs.readFileSync(file, "utf8");
const response = new Response(Bun.file(file));
expect(await response.text()).toBe(text);
});
it("Response -> Bun.file -> Response -> text", async () => {
const file = path.join(import.meta.dir, "fetch.js.txt");
const text = fs.readFileSync(file, "utf8");
const response = new Response(Bun.file(file));
const response2 = response.clone();
expect(await response2.text()).toBe(text);
});
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