public async Task CompareIdenticalFiles()
{
var rng = new Random();
var path1 = Path.GetRandomFileName();
var path2 = Path.GetRandomFileName();
using (var file1 = File.Create(path1))
using (var file2 = File.Create(path2))
{
var bytes = new byte[FileSize];
rng.NextBytes(bytes);
var tasks = new[]
{
file1.WriteAsync(bytes),
file2.WriteAsync(bytes),
};
await Task.WhenAll(tasks.Select(t => t.AsTask()));
}
var fcompare = new FileCompare();
Assert.IsTrue(await fcompare.AreEqualAsync(path1, path2));
File.Delete(path1);
File.Delete(path2);
}
public async Task TestCancellation()
{
var bytes = new byte[StreamCompare.DefaultBufferSize];
var path1 = Path.GetRandomFileName();
var path2 = Path.GetRandomFileName();
using (var file1 = File.Create(path1))
using (var file2 = File.Create(path2))
{
var tasks = new[]
{
file1.WriteAsync(bytes),
file2.WriteAsync(bytes),
};
await Task.WhenAll(tasks.Select(t => t.AsTask()));
}
var fcompare = new FileCompare();
var canceled = new CancellationToken(true);
await Assert.ThrowsExceptionAsync <TaskCanceledException>(async() =>
{
await fcompare.AreEqualAsync(path1, path2, canceled);
});
File.Delete(path1);
File.Delete(path2);
}
public async Task BasicFileCompare()
{
var path1 = Path.GetRandomFileName();
var path2 = Path.GetRandomFileName();
using (var file1 = File.Create(path1))
using (var file2 = File.Create(path2))
{
var bytes1 = new byte[FileSize];
var bytes2 = new byte[FileSize];
var rng = new Random();
rng.NextBytes(bytes1);
rng.NextBytes(bytes2);
var tasks = new[]
{
file1.WriteAsync(bytes1),
file2.WriteAsync(bytes2),
};
await Task.WhenAll(tasks.Select(t => t.AsTask()));
}
var fileInfo1 = new FileInfo(path1);
var fileInfo2 = new FileInfo(path2);
Assert.AreEqual(FileSize, fileInfo1.Length);
Assert.AreEqual(FileSize, fileInfo2.Length);
var fcompare = new FileCompare();
Assert.IsFalse(await fcompare.AreEqualAsync(path1, path2));
// These will throw if the handles haven't been closed, which would indicate a bug
File.Delete(path1);
File.Delete(path2);
}
public async Task CompareSameFile()
{
var rng = new Random();
var path1 = Path.GetRandomFileName();
using (var file1 = File.Create(path1))
{
var bytes1 = new byte[FileSize];
rng.NextBytes(bytes1);
await file1.WriteAsync(bytes1);
}
var fileInfo1 = new FileInfo(path1);
Assert.AreEqual(FileSize, fileInfo1.Length);
var fcompare = new FileCompare();
Assert.IsTrue(await fcompare.AreEqualAsync(path1, path1));
File.Delete(path1);
}
public async Task CompareDifferentLengths()
{
var bytes = new byte[StreamCompare.DefaultBufferSize * 2];
var path1 = Path.GetRandomFileName();
var path2 = Path.GetRandomFileName();
using (var file1 = File.Create(path1))
using (var file2 = File.Create(path2))
{
var tasks = new[]
{
file1.WriteAsync(bytes),
file2.WriteAsync(bytes.AsMemory(12))
};
await Task.WhenAll(tasks.Select(t => t.AsTask()));
}
// And use a custom buffer size
var fcompare = new FileCompare(3907); // prime number for good measure
Assert.IsFalse(await fcompare.AreEqualAsync(path1, path2));
}
