84 lines
2.6 KiB
C#
84 lines
2.6 KiB
C#
using Logging;
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using NUnit.Framework;
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using Utils;
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namespace FileUtils
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{
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public class TrackedFile
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{
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private readonly ILog log;
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public TrackedFile(ILog log, string filename, string label)
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{
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this.log = log;
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Filename = filename;
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Label = label;
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}
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public string Filename { get; }
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public string Label { get; }
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public void AssertIsEqual(TrackedFile? actual)
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{
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var sw = Stopwatch.Begin(log);
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try
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{
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AssertEqual(actual);
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}
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finally
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{
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sw.End($"{nameof(TrackedFile)}.{nameof(AssertIsEqual)}");
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}
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}
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public string Describe()
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{
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var sizePostfix = $" ({Formatter.FormatByteSize(GetFileSize())})";
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if (!string.IsNullOrEmpty(Label)) return Label + sizePostfix;
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return $"'{Filename}'{sizePostfix}";
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}
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private void AssertEqual(TrackedFile? actual)
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{
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if (actual == null) Assert.Fail("TestFile is null.");
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if (actual == this || actual!.Filename == Filename) Assert.Fail("TestFile is compared to itself.");
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Assert.That(actual.GetFileSize(), Is.EqualTo(GetFileSize()), "Files are not of equal length.");
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using var streamExpected = new FileStream(Filename, FileMode.Open, FileAccess.Read);
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using var streamActual = new FileStream(actual.Filename, FileMode.Open, FileAccess.Read);
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var bytesExpected = new byte[FileManager.ChunkSize];
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var bytesActual = new byte[FileManager.ChunkSize];
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var readExpected = 0;
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var readActual = 0;
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while (true)
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{
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readExpected = streamExpected.Read(bytesExpected, 0, FileManager.ChunkSize);
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readActual = streamActual.Read(bytesActual, 0, FileManager.ChunkSize);
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if (readExpected == 0 && readActual == 0)
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{
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log.Log($"OK: '{Describe()}' is equal to '{actual.Describe()}'.");
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return;
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}
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Assert.That(readActual, Is.EqualTo(readExpected), "Unable to read buffers of equal length.");
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for (var i = 0; i < readActual; i++)
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{
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if (bytesExpected[i] != bytesActual[i]) Assert.Fail("File contents not equal.");
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}
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}
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}
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private long GetFileSize()
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{
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var info = new FileInfo(Filename);
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return info.Length;
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}
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}
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}
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