import * as fs from 'node:fs/promises';
import * as path from 'node:path';
import assert from 'node:assert/strict';
import { describe, it } from 'node:test';
import { isProbablyBinary } from '../../../lib/fs-helpers.js';
import { withFileOpsFixture } from '../fixtures/file-ops-hooks.js';
function registerBinaryBasics(getTestDir: () => string): void {
void it('isProbablyBinary identifies binary files', async () => {
const isBinary = await isProbablyBinary(
path.join(getTestDir(), 'image.png')
);
assert.strictEqual(isBinary, true);
});
void it('isProbablyBinary identifies text files', async () => {
const isBinary = await isProbablyBinary(
path.join(getTestDir(), 'README.md')
);
assert.strictEqual(isBinary, false);
});
}
function registerBinaryEdgeCases(getTestDir: () => string): void {
void it('isProbablyBinary identifies empty files as text', async () => {
const emptyFile = path.join(getTestDir(), 'empty.txt');
await fs.writeFile(emptyFile, '');
const isBinary = await isProbablyBinary(emptyFile);
assert.strictEqual(isBinary, false);
await fs.rm(emptyFile);
});
void it('isProbablyBinary identifies UTF-8 BOM files as text', async () => {
const bomFile = path.join(getTestDir(), 'bom.txt');
const content = Buffer.concat([
Buffer.from([0xef, 0xbb, 0xbf]),
Buffer.from('Hello World'),
]);
await fs.writeFile(bomFile, content);
const isBinary = await isProbablyBinary(bomFile);
assert.strictEqual(isBinary, false);
await fs.rm(bomFile);
});
}
void describe('isProbablyBinary', () => {
withFileOpsFixture((getTestDir) => {
registerBinaryBasics(getTestDir);
registerBinaryEdgeCases(getTestDir);
});
});
