public void InvalidDll_Throws()
{
var path = BaseDir.Combine("test.txt").WriteAllText("this is definitely not a valid dll");
File.Exists(path).ShouldBeTrue();
Should.Throw <PeVerifyException>(() => PeVerify.Verify(path));
}
public void MissingDll_Throws()
{
var badPath = GetType().Assembly.Location + ".xyzzy";
File.Exists(badPath).ShouldBeFalse();
Should.Throw <PeVerifyException>(() => PeVerify.Verify(badPath));
}
public void ValidDll_VerifiesClean()
{
var dllPath = typeof(TestAttribute).Assembly.Location; // pick nunit, why not
File.Exists(dllPath).ShouldBeTrue();
Should.NotThrow(() => PeVerify.Verify(dllPath));
}
void Write(AssemblyDefinition assemblyToPatch, NPath assemblyToPatchPath, PatchOptions patchOptions = default)
{
// atomic write of file with backup
// TODO: skip backup if existing file already patched. want the .orig to only be the unpatched file.
// write to tmp and release the lock
var tmpPath = assemblyToPatchPath.ChangeExtension(".tmp");
tmpPath.DeleteIfExists();
assemblyToPatch.Write(tmpPath); // $$$ , new WriterParameters { WriteSymbols = true }); see https://github.com/jbevain/cecil/issues/421
assemblyToPatch.Dispose();
// TODO: peverify obviously won't work with memory written streams. also needs all the dependencies.
// solution is to create a temp folder, write the patched dll there as well as any of its direct dependencies, and run peverify
if ((patchOptions & PatchOptions.SkipPeVerify) == 0)
{
PeVerify.Verify(tmpPath);
}
// move the actual file to backup, and move the tmp to actual
var backupPath = ElevatedWeaver.GetPatchBackupPathFor(assemblyToPatchPath);
File.Replace(tmpPath, assemblyToPatchPath, backupPath);
}
protected NPath Compile(string testAssemblyName, string sourceCode, params string[] dependentAssemblyNames)
{
// prefix the assembly name because they are globally unique and don't want to ever collide
var testAssemblyPath = BaseDir
.Combine($"{TestContext.CurrentContext.GetFixtureName()}_{testAssemblyName}")
.ChangeExtension(".dll");
// set up to compile
var compiler = new Microsoft.CSharp.CSharpCodeProvider();
var compilerArgs = new CompilerParameters
{
OutputAssembly = testAssemblyPath,
IncludeDebugInformation = true,
CompilerOptions = "/o- /debug+ /warn:0"
};
compilerArgs.ReferencedAssemblies.Add(typeof(int).Assembly.Location); // mscorlib
// TODO: use typecache
var assemblies = AppDomain.CurrentDomain
.GetAssemblies()
.Where(a => !a.IsDynamic)
.ToDictionary(a => a.GetName().Name, a => a.Location.ToNPath(), StringComparer.OrdinalIgnoreCase);
foreach (var dependentAssemblyName in dependentAssemblyNames)
{
// we may have already copied it in
var path = BaseDir.Combine(dependentAssemblyName).ChangeExtension(".dll");
// if not,
if (!path.Exists() && assemblies.TryGetValue(dependentAssemblyName, out path))
{
path.Copy(BaseDir.Combine(path.FileName));
}
compilerArgs.ReferencedAssemblies.Add(path);
}
// compile and handle errors
var compilerResult = compiler.CompileAssemblyFromSource(compilerArgs, sourceCode);
if (compilerResult.Errors.Count > 0)
{
var errorText = compilerResult.Errors
.OfType <CompilerError>()
.Select(e => $"({e.Line},{e.Column}): error {e.ErrorNumber}: {e.ErrorText}")
.Prepend("Compiler errors:")
.StringJoin("\n");
throw new Exception(errorText);
}
testAssemblyPath.ShouldBe(new NPath(compilerResult.PathToAssembly));
PeVerify.Verify(testAssemblyPath); // sanity check on what the compiler generated
return(testAssemblyPath);
}