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import fs from "fs";
import { it, expect } from "bun:test";
import path from "path";
it("Response.file", async () => {
const file = path.join(import.meta.dir, "fetch.js.txt");
expect(await Response.file(file).text()).toBe(fs.readFileSync(file, "utf8"));
});
it("Response.file as a blob", async () => {
const filePath = path.join(import.meta.url, "../fetch.js.txt");
const fixture = fs.readFileSync(filePath, "utf8");
// this is a Response 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 response = Response.file(filePath);
// at this point, it's still just a file path
var blob = await response.blob();
// 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.size);
blob = null;
response = null;
Bun.gc(true);
await new Promise((resolve) => setTimeout(resolve, 1));
// now we're back
var response = Response.file(file);
var blob = await response.blob();
expect(blob.size).toBe(0);
});
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