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import { describe, it, expect } from "bun:test";
import {
mkdirSync,
existsSync,
readFileSync,
writeFileSync,
readFile,
read,
openSync,
readSync,
closeSync,
writeSync,
} from "node:fs";
const Buffer = globalThis.Buffer || Uint8Array;
if (!import.meta.dir) {
import.meta.dir = ".";
}
describe("mkdirSync", () => {
it("should create a directory", () => {
const tempdir = `/tmp/fs.test.js/${Date.now()}/1234/hi`;
expect(existsSync(tempdir)).toBe(false);
expect(tempdir.includes(mkdirSync(tempdir, { recursive: true }))).toBe(
true
);
expect(existsSync(tempdir)).toBe(true);
});
});
describe("readSync", () => {
const firstFourBytes = new Uint32Array(
new TextEncoder().encode("File").buffer
)[0];
it("works with a position set to 0", () => {
const fd = openSync(import.meta.dir + "/readFileSync.txt", "r");
const four = new Uint8Array(4);
{
const count = readSync(fd, four, 0, 4, 0);
const u32 = new Uint32Array(four.buffer)[0];
expect(u32).toBe(firstFourBytes);
expect(count).toBe(4);
}
closeSync(fd);
});
it("works without position set", () => {
const fd = openSync(import.meta.dir + "/readFileSync.txt", "r");
const four = new Uint8Array(4);
{
const count = readSync(fd, four);
const u32 = new Uint32Array(four.buffer)[0];
expect(u32).toBe(firstFourBytes);
expect(count).toBe(4);
}
closeSync(fd);
});
});
describe("writeSync", () => {
it("works with a position set to 0", () => {
const fd = openSync(import.meta.dir + "/writeFileSync.txt", "w+");
const four = new Uint8Array(4);
{
const count = writeSync(fd, new TextEncoder().encode("File"), 0, 4, 0);
expect(count).toBe(4);
}
closeSync(fd);
});
it("works without position set", () => {
const fd = openSync(import.meta.dir + "/writeFileSync.txt", "w+");
const four = new Uint8Array(4);
{
const count = writeSync(fd, new TextEncoder().encode("File"));
expect(count).toBe(4);
}
closeSync(fd);
});
});
describe("readFileSync", () => {
it("works", () => {
const text = readFileSync(import.meta.dir + "/readFileSync.txt", "utf8");
expect(text).toBe("File read successfully");
});
it("works with a file url", () => {
const text = readFileSync(
new URL("file://" + import.meta.dir + "/readFileSync.txt"),
"utf8"
);
expect(text).toBe("File read successfully");
});
it("returning Buffer works", () => {
const text = readFileSync(import.meta.dir + "/readFileSync.txt");
const encoded = [
70, 105, 108, 101, 32, 114, 101, 97, 100, 32, 115, 117, 99, 99, 101, 115,
115, 102, 117, 108, 108, 121,
];
for (let i = 0; i < encoded.length; i++) {
expect(text[i]).toBe(encoded[i]);
}
});
});
describe("readFile", () => {
it("works", async () => {
await new Promise((resolve, reject) => {
readFile(import.meta.dir + "/readFileSync.txt", "utf8", (err, text) => {
expect(text).toBe("File read successfully");
resolve(true);
});
});
});
it("returning Buffer works", async () => {
await new Promise((resolve, reject) => {
readFile(import.meta.dir + "/readFileSync.txt", (err, text) => {
const encoded = [
70, 105, 108, 101, 32, 114, 101, 97, 100, 32, 115, 117, 99, 99, 101,
115, 115, 102, 117, 108, 108, 121,
];
for (let i = 0; i < encoded.length; i++) {
expect(text[i]).toBe(encoded[i]);
}
resolve(true);
});
});
});
});
describe("writeFileSync", () => {
it("works", () => {
const path = `/tmp/${Date.now()}.writeFileSync.txt`;
writeFileSync(path, "File written successfully", "utf8");
expect(readFileSync(path, "utf8")).toBe("File written successfully");
});
it("returning Buffer works", () => {
const buffer = new Buffer([
70, 105, 108, 101, 32, 119, 114, 105, 116, 116, 101, 110, 32, 115, 117,
99, 99, 101, 115, 115, 102, 117, 108, 108, 121,
]);
const path = `/tmp/${Date.now()}.blob.writeFileSync.txt`;
writeFileSync(path, buffer);
const out = readFileSync(path);
for (let i = 0; i < buffer.length; i++) {
expect(buffer[i]).toBe(out[i]);
}
});
it("returning ArrayBuffer works", () => {
const buffer = new Buffer([
70, 105, 108, 101, 32, 119, 114, 105, 116, 116, 101, 110, 32, 115, 117,
99, 99, 101, 115, 115, 102, 117, 108, 108, 121,
]);
const path = `/tmp/${Date.now()}.blob2.writeFileSync.txt`;
writeFileSync(path, buffer);
const out = readFileSync(path);
for (let i = 0; i < buffer.length; i++) {
expect(buffer[i]).toBe(out[i]);
}
});
});
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