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fs.copyFile.spec.js
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fs.copyFile.spec.js
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'use strict';
const helper = require('../helper');
const fs = require('fs');
const mock = require('../../lib/index');
const assert = helper.assert;
const withPromise = helper.withPromise;
if (fs.copyFile && fs.copyFileSync) {
describe('fs.copyFile(src, dest[, flags], callback)', function() {
beforeEach(function() {
mock({
'path/to/src.txt': 'file content',
'path/to/other.txt': 'other file content',
empty: {}
});
});
afterEach(mock.restore);
it('copies a file to an empty directory', function(done) {
fs.copyFile('path/to/src.txt', 'empty/dest.txt', function(err) {
assert.isTrue(!err);
assert.isTrue(fs.existsSync('empty/dest.txt'));
assert.equal(String(fs.readFileSync('empty/dest.txt')), 'file content');
done();
});
});
it('supports Buffer input', function(done) {
fs.copyFile(
Buffer.from('path/to/src.txt'),
Buffer.from('empty/dest.txt'),
function(err) {
assert.isTrue(!err);
assert.isTrue(fs.existsSync('empty/dest.txt'));
assert.equal(
String(fs.readFileSync('empty/dest.txt')),
'file content'
);
done();
}
);
});
withPromise.it('promise copies a file to an empty directory', function(
done
) {
fs.promises
.copyFile('path/to/src.txt', 'empty/dest.txt')
.then(function() {
assert.isTrue(fs.existsSync('empty/dest.txt'));
assert.equal(
String(fs.readFileSync('empty/dest.txt')),
'file content'
);
done();
}, done);
});
it('truncates dest file if it exists', function(done) {
fs.copyFile('path/to/src.txt', 'path/to/other.txt', function(err) {
assert.isTrue(!err);
assert.equal(
String(fs.readFileSync('path/to/other.txt')),
'file content'
);
done();
});
});
withPromise.it('promise truncates dest file if it exists', function(done) {
fs.promises
.copyFile('path/to/src.txt', 'path/to/other.txt')
.then(function() {
assert.equal(
String(fs.readFileSync('path/to/other.txt')),
'file content'
);
done();
}, done);
});
it('throws if dest exists and exclusive', function(done) {
fs.copyFile(
'path/to/src.txt',
'path/to/other.txt',
fs.constants.COPYFILE_EXCL,
function(err) {
assert.instanceOf(err, Error);
assert.equal(err.code, 'EEXIST');
done();
}
);
});
withPromise.it('promise throws if dest exists and exclusive', function(
done
) {
fs.promises
.copyFile(
'path/to/src.txt',
'path/to/other.txt',
fs.constants.COPYFILE_EXCL
)
.then(
function() {
assert.fail('should not succeed.');
done();
},
function(err) {
assert.instanceOf(err, Error);
assert.equal(err.code, 'EEXIST');
done();
}
);
});
it('fails if src does not exist', function(done) {
fs.copyFile('path/to/bogus.txt', 'empty/dest.txt', function(err) {
assert.instanceOf(err, Error);
assert.equal(err.code, 'ENOENT');
done();
});
});
withPromise.it('promise fails if src does not exist', function(done) {
fs.promises.copyFile('path/to/bogus.txt', 'empty/dest.txt').then(
function() {
assert.fail('should not succeed.');
done();
},
function(err) {
assert.instanceOf(err, Error);
assert.equal(err.code, 'ENOENT');
done();
}
);
});
it('fails if dest path does not exist', function(done) {
fs.copyFile('path/to/src.txt', 'path/nope/dest.txt', function(err) {
assert.instanceOf(err, Error);
assert.equal(err.code, 'ENOENT');
done();
});
});
withPromise.it('promise fails if dest path does not exist', function(done) {
fs.promises.copyFile('path/to/src.txt', 'path/nope/dest.txt').then(
function() {
assert.fail('should not succeed.');
done();
},
function(err) {
assert.instanceOf(err, Error);
assert.equal(err.code, 'ENOENT');
done();
}
);
});
it('fails if dest is a directory', function(done) {
fs.copyFile('path/to/src.txt', 'empty', function(err) {
assert.instanceOf(err, Error);
assert.equal(err.code, 'EISDIR');
done();
});
});
withPromise.it('promise fails if dest is a directory', function(done) {
fs.promises.copyFile('path/to/src.txt', 'empty').then(
function() {
assert.fail('should not succeed.');
done();
},
function(err) {
assert.instanceOf(err, Error);
assert.equal(err.code, 'EISDIR');
done();
}
);
});
});
}