public void Run(string args, OctodiffAppVariant octodiff)
{
var stdErrBuilder = new StringBuilder();
var stdOutBuilder = new StringBuilder();
var outputBuilder = new StringBuilder();
var path = octodiff == OctodiffAppVariant.Sync ?
new Uri(typeof(OctodiffProgram).Assembly.CodeBase).LocalPath
: new Uri(typeof(OctodiffAsyncProgram).Assembly.CodeBase).LocalPath;
var exit = SilentProcessRunner.ExecuteCommand(path,
args,
TestContext.CurrentContext.TestDirectory,
output =>
{
stdOutBuilder.AppendLine(output);
outputBuilder.AppendLine(output);
Trace.WriteLine(output);
},
output =>
{
stdErrBuilder.AppendLine(output);
outputBuilder.AppendLine(output);
Trace.WriteLine(output);
});
StdErr = stdErrBuilder.ToString();
StdOut = stdOutBuilder.ToString();
Output = outputBuilder.ToString();
ExitCode = exit;
}
public void ExecuteWithTimings(string name, int numberOfFiles, OctodiffAppVariant octodiff)
{
var newName = Path.ChangeExtension(name, "2.zip");
var copyName = Path.ChangeExtension(name, "2_out.zip");
Time("Package creation", () => PackageGenerator.GeneratePackage(name, numberOfFiles));
Time("Package modification", () => PackageGenerator.ModifyPackage(name, newName, (int)(0.33 * numberOfFiles), (int)(0.10 * numberOfFiles)));
Time("Signature creation", () => Run("signature " + name + " " + name + ".sig", octodiff));
Time("Delta creation", () => Run("delta " + name + ".sig " + newName + " " + name + ".delta", octodiff));
Time("Patch application", () => Run("patch " + name + " " + name + ".delta" + " " + copyName, octodiff));
Time("Patch application (no verify)", () => Run("patch " + name + " " + name + ".delta" + " " + copyName + " --skip-verification", octodiff));
}
public void ShouldCreateSignature(string name, int numberOfFiles, OctodiffAppVariant octodiff)
{
PackageGenerator.GeneratePackage(name, numberOfFiles);
Run("signature " + name + " " + name + ".sig", octodiff);
Assert.That(ExitCode, Is.EqualTo(0));
var basisSize = new FileInfo(Path.Combine(TestContext.CurrentContext.TestDirectory, name)).Length;
var signatureSize = new FileInfo(Path.Combine(TestContext.CurrentContext.TestDirectory, name) + ".sig").Length;
var signatureSizePercentageOfBasis = signatureSize / (double)basisSize;
Trace.WriteLine(string.Format("Basis size: {0:n0}", basisSize));
Trace.WriteLine(string.Format("Signature size: {0:n0}", signatureSize));
Trace.WriteLine(string.Format("Signature ratio: {0:n3}", signatureSizePercentageOfBasis));
Assert.IsTrue(0.006 <= signatureSizePercentageOfBasis && signatureSizePercentageOfBasis <= 0.014);
}
public void PatchVerificationCanBeSkipped(string name, int numberOfFiles, OctodiffAppVariant octodiff)
{
var newBasis = Path.ChangeExtension(Path.Combine(TestContext.CurrentContext.TestDirectory, name), "1.zip");
var newName = Path.ChangeExtension(Path.Combine(TestContext.CurrentContext.TestDirectory, name), "2.zip");
var copyName = Path.ChangeExtension(Path.Combine(TestContext.CurrentContext.TestDirectory, name), "2_out.zip");
PackageGenerator.GeneratePackage(name, numberOfFiles);
PackageGenerator.ModifyPackage(name, newBasis, (int)(0.33 * numberOfFiles), (int)(0.10 * numberOfFiles));
PackageGenerator.ModifyPackage(name, newName, (int)(0.33 * numberOfFiles), (int)(0.10 * numberOfFiles));
Run("signature " + name + " " + name + ".sig", octodiff);
Run("delta " + name + ".sig " + newName + " " + name + ".delta", octodiff);
Run("patch " + newBasis + " " + name + ".delta" + " " + copyName + " --skip-verification", octodiff);
Assert.That(ExitCode, Is.EqualTo(0));
Assert.That(Sha1(newName), Is.Not.EqualTo(Sha1(copyName)));
}
public void DeltaOfChangedFileShouldResultInNewDataSegments(string name, int numberOfFiles, OctodiffAppVariant octodiff)
{
PackageGenerator.GeneratePackage(name, numberOfFiles);
Run("signature " + name + " " + name + ".sig", octodiff);
Assert.That(ExitCode, Is.EqualTo(0));
var newName = Path.ChangeExtension(name, "2.zip");
PackageGenerator.ModifyPackage(name, newName, (int)(0.33 * numberOfFiles), (int)(0.10 * numberOfFiles));
Run("delta " + name + ".sig " + newName + " " + name + ".delta", octodiff);
Assert.That(ExitCode, Is.EqualTo(0));
Run("explain-delta " + name + ".delta", octodiff);
Assert.That(Regex.IsMatch(Output, "Copy: ([0-9A-F]+) to ([0-9A-F]+)\r\n"));
Assert.That(Regex.IsMatch(Output, "Data: \\(([0-9]+) bytes\\)"));
var originalSize = new FileInfo(Path.Combine(TestContext.CurrentContext.TestDirectory, name)).Length;
var newSize = new FileInfo(Path.Combine(TestContext.CurrentContext.TestDirectory, newName)).Length;
var deltaSize = new FileInfo(Path.Combine(TestContext.CurrentContext.TestDirectory, name + ".delta")).Length;
var actualDifference = Math.Abs(newSize - originalSize);
var deltaToActualRatio = (double)deltaSize / actualDifference;
Trace.WriteLine(string.Format("Delta ratio: {0:n3}", deltaToActualRatio));
Assert.IsTrue(deltaSize * 2 < newSize, "Delta should be at least half the new file size");
Assert.IsTrue(0.80 <= deltaToActualRatio && deltaToActualRatio <= 1.60, "Delta should be pretty close to the actual file differences");
}
public void DeltaOfUnchangedFileShouldResultInJustCopySegment(string name, int numberOfFiles, OctodiffAppVariant octodiff)
{
PackageGenerator.GeneratePackage(name, numberOfFiles);
Run("signature " + name + " " + name + ".sig", octodiff);
Assert.That(ExitCode, Is.EqualTo(0));
Run("delta " + name + ".sig " + name + " " + name + ".delta", octodiff);
Assert.That(ExitCode, Is.EqualTo(0));
Run("explain-delta " + name + ".delta", octodiff);
Assert.That(Regex.IsMatch(Output, "^Copy: 0 to ([0-9A-F]+)\r\n$"));
Assert.That(Output, Does.Not.Contains("Data:"));
}
public void ShouldCreateDifferentSignaturesBasedOnChunkSize(string name, int numberOfFiles, OctodiffAppVariant octodiff)
{
PackageGenerator.GeneratePackage(name, numberOfFiles);
Run("signature " + name + " " + name + ".sig.1 --chunk-size=128", octodiff);
Run("signature " + name + " " + name + ".sig.2 --chunk-size=256", octodiff);
Run("signature " + name + " " + name + ".sig.3 --chunk-size=1024", octodiff);
Run("signature " + name + " " + name + ".sig.4 --chunk-size=2048", octodiff);
Run("signature " + name + " " + name + ".sig.5 --chunk-size=31744", octodiff);
Assert.That(Length(Path.Combine(TestContext.CurrentContext.TestDirectory, name) + ".sig.1")
> Length(Path.Combine(TestContext.CurrentContext.TestDirectory, name) + ".sig.2"));
Assert.That(Length(Path.Combine(TestContext.CurrentContext.TestDirectory, name) + ".sig.2")
> Length(Path.Combine(TestContext.CurrentContext.TestDirectory, name) + ".sig.3"));
Assert.That(Length(Path.Combine(TestContext.CurrentContext.TestDirectory, name) + ".sig.3")
> Length(Path.Combine(TestContext.CurrentContext.TestDirectory, name) + ".sig.4"));
Assert.That(Length(Path.Combine(TestContext.CurrentContext.TestDirectory, name) + ".sig.4")
> Length(Path.Combine(TestContext.CurrentContext.TestDirectory, name) + ".sig.5"));
}
public void PatchVerificationShouldFailWhenFilesModified(string name, int numberOfFiles, OctodiffAppVariant octodiff)
{
var newBasis = Path.ChangeExtension(Path.Combine(TestContext.CurrentContext.TestDirectory, name), "1.zip");
var newName = Path.ChangeExtension(Path.Combine(TestContext.CurrentContext.TestDirectory, name), "2.zip");
var copyName = Path.ChangeExtension(Path.Combine(TestContext.CurrentContext.TestDirectory, name), "2_out.zip");
PackageGenerator.GeneratePackage(name, numberOfFiles);
PackageGenerator.ModifyPackage(name, newBasis, numberOfFiles, (int)(0.5 * numberOfFiles));
PackageGenerator.ModifyPackage(name, newName, (int)(0.33 * numberOfFiles), (int)(0.10 * numberOfFiles));
Run("signature " + name + " " + name + ".sig", octodiff);
Run("delta " + name + ".sig " + newName + " " + name + ".delta", octodiff);
Run("patch " + newBasis + " " + name + ".delta" + " " + copyName, octodiff);
Assert.That(ExitCode, Is.EqualTo(2));
Assert.That(Output, Does.Contain("Error: Verification of the patched file failed"));
}
public void PatchingShouldResultInPerfectCopy(string name, int numberOfFiles, OctodiffAppVariant octodiff)
{
var newName = Path.ChangeExtension(Path.Combine(TestContext.CurrentContext.TestDirectory, name), "2.zip");
var copyName = Path.ChangeExtension(Path.Combine(TestContext.CurrentContext.TestDirectory, name), "2_out.zip");
PackageGenerator.GeneratePackage(name, numberOfFiles);
PackageGenerator.ModifyPackage(name, newName, (int)(0.33 * numberOfFiles), (int)(0.10 * numberOfFiles));
Run("signature " + name + " " + name + ".sig", octodiff);
Run("delta " + name + ".sig " + newName + " " + name + ".delta", octodiff);
Run("patch " + name + " " + name + ".delta" + " " + copyName, octodiff);
Assert.That(ExitCode, Is.EqualTo(0));
Assert.That(Sha1(newName), Is.EqualTo(Sha1(copyName)));
}
