test.js

import path from 'path';
import fs from 'fs';
import crypto from 'crypto';
import rimraf from 'rimraf';
import test from 'ava';
import tempfile from 'tempfile';
import CpyError from './cpy-error';
import cpy from '.';

const read = (...args) => fs.readFileSync(path.join(...args), 'utf8');

test.beforeEach(t => {
	t.context.tmp = tempfile();
	t.context.EPERM = tempfile('EPERM');
	fs.mkdirSync(t.context.EPERM, 0);
});

test.afterEach(t => {
	rimraf.sync(t.context.tmp);
	rimraf.sync(t.context.EPERM);
});

test('reject Errors on missing `source`', async t => {
	const error1 = await t.throwsAsync(cpy, /`source`/);
	t.true(error1 instanceof CpyError);

	const error2 = await t.throwsAsync(cpy(null, 'destination'), /`source`/);
	t.true(error2 instanceof CpyError);

	const error3 = await t.throwsAsync(cpy([], 'destination'), /`source`/);
	t.true(error3 instanceof CpyError);
});

test('reject Errors on missing `destination`', async t => {
	const error = await t.throwsAsync(cpy('TARGET'), /`destination`/);
	t.true(error instanceof CpyError);
});

test('copy single file', async t => {
	await cpy('license', t.context.tmp);

	t.is(read('license'), read(t.context.tmp, 'license'));
});

test('copy array of files', async t => {
	await cpy(['license', 'package.json'], t.context.tmp);

	t.is(read('license'), read(t.context.tmp, 'license'));
	t.is(read('package.json'), read(t.context.tmp, 'package.json'));
});

test('cwd', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'cwd'));
	fs.writeFileSync(path.join(t.context.tmp, 'cwd/hello.js'), 'console.log("hello");');

	await cpy(['hello.js'], 'destination', {cwd: path.join(t.context.tmp, 'cwd')});

	t.is(read(t.context.tmp, 'cwd/hello.js'), read(t.context.tmp, 'cwd/destination/hello.js'));
});

test('do not overwrite', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.writeFileSync(path.join(t.context.tmp, 'license'), '');

	await cpy(['license'], t.context.tmp, {overwrite: false});

	t.is(read(t.context.tmp, 'license'), '');
});

test('do not keep path structure', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'cwd'));
	fs.writeFileSync(path.join(t.context.tmp, 'cwd/hello.js'), 'console.log("hello");');

	await cpy([path.join(t.context.tmp, 'cwd/hello.js')], t.context.tmp);

	t.is(read(t.context.tmp, 'cwd/hello.js'), read(t.context.tmp, 'hello.js'));
});

test('path structure', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'cwd'));
	fs.writeFileSync(path.join(t.context.tmp, 'cwd/hello.js'), 'console.log("hello");');

	await cpy([path.join(t.context.tmp, 'cwd/hello.js')], t.context.tmp, {parents: true});

	t.is(read(t.context.tmp, 'cwd/hello.js'), read(t.context.tmp, t.context.tmp, 'cwd/hello.js'));
});

test('rename filenames but not filepaths', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'source'));
	fs.writeFileSync(path.join(t.context.tmp, 'hello.js'), 'console.log("hello");');
	fs.writeFileSync(path.join(t.context.tmp, 'source/hello.js'), 'console.log("hello");');

	await cpy(['hello.js', 'source/hello.js'], 'destination/subdir', {
		cwd: t.context.tmp,
		parents: true,
		rename: 'hi.js'
	});

	t.is(read(t.context.tmp, 'hello.js'), read(t.context.tmp, 'destination/subdir/hi.js'));
	t.is(read(t.context.tmp, 'source/hello.js'), read(t.context.tmp, 'destination/subdir/source/hi.js'));
});

test('rename filenames using a function', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'source'));
	fs.writeFileSync(path.join(t.context.tmp, 'foo.js'), 'console.log("foo");');
	fs.writeFileSync(path.join(t.context.tmp, 'source/bar.js'), 'console.log("bar");');

	await cpy(['foo.js', 'source/bar.js'], 'destination/subdir', {
		cwd: t.context.tmp,
		parents: true,
		rename: basename => `prefix-${basename}`
	});

	t.is(read(t.context.tmp, 'foo.js'), read(t.context.tmp, 'destination/subdir/prefix-foo.js'));
	t.is(read(t.context.tmp, 'source/bar.js'), read(t.context.tmp, 'destination/subdir/source/prefix-bar.js'));
});

test('cp-file errors are not glob errors', async t => {
	const error = await t.throwsAsync(cpy('license', t.context.EPERM), /EPERM/);
	t.notRegex(error.message, /glob/);
});

test('cp-file errors are CpyErrors', async t => {
	const error = await t.throwsAsync(cpy('license', t.context.EPERM), /EPERM/);
	t.true(error instanceof CpyError);
});

test('glob errors are CpyErrors', async t => {
	const error = await t.throwsAsync(cpy(t.context.EPERM + '/**', t.context.tmp), /EPERM/);
	t.true(error instanceof CpyError);
});

test('throws on non-existing file', async t => {
	fs.mkdirSync(t.context.tmp);

	const error = await t.throwsAsync(cpy(['no-file'], t.context.tmp));
	t.true(error instanceof CpyError);
});

test('reports copy progress of single file', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'cwd'));
	fs.writeFileSync(path.join(t.context.tmp, 'cwd/foo'), 'lorem ipsum');

	let report;

	await cpy(['foo'], t.context.tmp, {cwd: path.join(t.context.tmp, 'cwd')})
		.on('progress', event => {
			report = event;
		});

	t.not(report, undefined);
	t.is(report.totalFiles, 1);
	t.is(report.completedFiles, 1);
	t.is(report.completedSize, 11);
	t.is(report.percent, 1);
});

test('reports copy progress of multiple files', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'cwd'));
	fs.writeFileSync(path.join(t.context.tmp, 'cwd/foo'), 'lorem ipsum');
	fs.writeFileSync(path.join(t.context.tmp, 'cwd/bar'), 'dolor sit amet');

	let report;

	await cpy(['foo', 'bar'], t.context.tmp, {cwd: path.join(t.context.tmp, 'cwd')})
		.on('progress', event => {
			report = event;
		});

	t.not(report, undefined);
	t.is(report.totalFiles, 2);
	t.is(report.completedFiles, 2);
	t.is(report.completedSize, 25);
	t.is(report.percent, 1);
});

test('reports correct completedSize', async t => {
	const ONE_MEGABYTE = (1 * 1024 * 1024) + 1;
	const buf = crypto.randomBytes(ONE_MEGABYTE);

	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'cwd'));
	fs.writeFileSync(path.join(t.context.tmp, 'cwd/fatfile'), buf);

	let report;
	let chunkCount = 0;

	await cpy(['fatfile'], t.context.tmp, {cwd: path.join(t.context.tmp, 'cwd')})
		.on('progress', event => {
			chunkCount++;
			report = event;
		});

	t.not(report, undefined);
	t.is(report.totalFiles, 1);
	t.is(report.completedFiles, 1);
	t.is(report.completedSize, ONE_MEGABYTE);
	t.true(chunkCount > 1);
	t.is(report.percent, 1);
});

test('returns the event emitter on early rejection', t => {
	const rejectedPromise = cpy(null, null);
	t.is(typeof rejectedPromise.on, 'function');
	rejectedPromise.catch(() => {});
});

test('returns destination path', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'cwd'));
	fs.writeFileSync(path.join(t.context.tmp, 'cwd/foo'), 'lorem ipsum');
	fs.writeFileSync(path.join(t.context.tmp, 'cwd/bar'), 'dolor sit amet');

	const to = await cpy(['foo', 'bar'], t.context.tmp, {cwd: path.join(t.context.tmp, 'cwd')});

	t.deepEqual(to, [
		path.join(t.context.tmp, 'foo'),
		path.join(t.context.tmp, 'bar')
	]);
});