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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Generic;
using System.Collections.Immutable;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Diagnostics;
using Microsoft.CodeAnalysis.Testing;
using Xunit;
namespace ILLink.RoslynAnalyzer.Tests
{
public abstract class TestCaseUtils
{
private static readonly string MonoLinkerTestsCases = "Mono.Linker.Tests.Cases";
public static readonly ReferenceAssemblies Net6PreviewAssemblies =
new ReferenceAssemblies (
"net6.0",
new PackageIdentity ("Microsoft.NETCore.App.Ref", "6.0.0-preview.7.21368.2"),
Path.Combine ("ref", "net6.0"))
.WithNuGetConfigFilePath (Path.Combine (TestCaseUtils.GetRepoRoot (), "NuGet.config"));
private static ImmutableArray<MetadataReference> s_net6Refs;
public async static ValueTask<ImmutableArray<MetadataReference>> GetNet6References ()
{
if (s_net6Refs.IsDefault) {
var refs = await Net6PreviewAssemblies.ResolveAsync (null, default);
ImmutableInterlocked.InterlockedInitialize (ref s_net6Refs, refs);
}
return s_net6Refs;
}
public static IEnumerable<object[]> GetTestData (string testSuiteName)
=> s_testCases[testSuiteName].Keys.Select (testName => new object[] { testName });
public static void RunTest (string suiteName, string testName, params (string, string)[] MSBuildProperties)
{
s_testCases[suiteName][testName].Run (MSBuildProperties);
}
private static readonly Dictionary<string, Dictionary<string, TestCase>> s_testCases = InitializeTestCases ();
private static Dictionary<string, Dictionary<string, TestCase>> InitializeTestCases ()
{
var testCases = new Dictionary<string, Dictionary<string, TestCase>> ();
foreach (var file in GetTestFiles ()) {
// Some tests are in nested directories. Walk up until we get the test suite directory.
string directory = Path.GetDirectoryName (file)!;
string parentDirectory;
while (Path.GetFileName (parentDirectory = Path.GetDirectoryName (directory)!) != MonoLinkerTestsCases)
directory = parentDirectory;
string suiteName = Path.GetFileName (directory);
if (!testCases.TryGetValue (suiteName, out var suiteTestCases)) {
suiteTestCases = new ();
testCases.Add (suiteName, suiteTestCases);
}
foreach (var testCase in BuildTestCasesForFile (file)) {
var canditateTestName = GetMemberSyntaxFullName (testCase.MemberSyntax);
string testName = canditateTestName;
int index = 0;
while (!suiteTestCases.TryAdd (testName, testCase)) {
testName = canditateTestName + "#" + (++index).ToString ();
}
testCase.Name = testName;
}
}
return testCases;
}
private static IEnumerable<TestCase> BuildTestCasesForFile (string testFile)
{
var root = CSharpSyntaxTree.ParseText (File.ReadAllText (testFile)).GetRoot ();
foreach (var node in root.DescendantNodes ()) {
if (node is MemberDeclarationSyntax m) {
var attrs = m.AttributeLists.SelectMany (al => al.Attributes.Where (IsWellKnown)).ToList ();
if (attrs.Count > 0) {
yield return new TestCase (m, attrs);
}
}
}
static bool IsWellKnown (AttributeSyntax attr)
{
switch (attr.Name.ToString ()) {
// Currently, the analyzer's test infra only understands these attributes when placed on methods.
case "ExpectedWarning":
case "LogContains":
case "LogDoesNotContain":
case "UnrecognizedReflectionAccessPattern":
return true;
}
return false;
}
}
public static void GetDirectoryPaths (out string rootSourceDirectory, out string testAssemblyPath)
{
#if DEBUG
var configDirectoryName = "Debug";
#else
var configDirectoryName = "Release";
#endif
#if NET6_0
const string tfm = "net6.0";
#else
const string tfm = "net5.0";
#endif
// Working directory is artifacts/bin/Mono.Linker.Tests/<config>/<tfm>
var artifactsBinDir = Path.Combine (Directory.GetCurrentDirectory (), "..", "..", "..");
rootSourceDirectory = Path.GetFullPath (Path.Combine (artifactsBinDir, "..", "..", "test", "Mono.Linker.Tests.Cases"));
testAssemblyPath = Path.GetFullPath (Path.Combine (artifactsBinDir, "ILLink.RoslynAnalyzer.Tests", configDirectoryName, tfm));
}
// Accepts string literal expressions or binary expressions concatenating strings
public static string GetStringFromExpression (ExpressionSyntax expr, SemanticModel? semanticModel = null)
{
if (expr == null)
return null!;
switch (expr.Kind ()) {
case SyntaxKind.AddExpression:
var addExpr = (BinaryExpressionSyntax) expr;
return GetStringFromExpression (addExpr.Left, semanticModel) + GetStringFromExpression (addExpr.Right, semanticModel);
case SyntaxKind.InvocationExpression:
var nameofValue = semanticModel!.GetConstantValue (expr);
if (nameofValue.HasValue)
return (nameofValue.Value as string)!;
return string.Empty;
case SyntaxKind.StringLiteralExpression:
var strLiteral = (LiteralExpressionSyntax) expr;
var token = strLiteral.Token;
Assert.Equal (SyntaxKind.StringLiteralToken, token.Kind ());
return token.ValueText;
case SyntaxKind.TypeOfExpression:
var typeofExpression = (TypeOfExpressionSyntax) expr;
var typeSymbol = semanticModel.GetSymbolInfo (typeofExpression.Type).Symbol;
return typeSymbol?.GetDisplayName () ?? string.Empty;
default:
Assert.True (false, "Unsupported expr kind " + expr.Kind ());
return null!;
}
}
public static Dictionary<string, ExpressionSyntax> GetAttributeArguments (AttributeSyntax attribute)
{
Dictionary<string, ExpressionSyntax> arguments = new Dictionary<string, ExpressionSyntax> ();
int ordinal = 0;
foreach (var argument in attribute.ArgumentList!.Arguments) {
string argName;
if (argument.NameEquals != null) {
argName = argument.NameEquals.ChildNodes ().OfType<IdentifierNameSyntax> ().First ().Identifier.ValueText;
} else if (argument.NameColon is NameColonSyntax nameColon) {
argName = nameColon.Name.Identifier.ValueText;
} else {
argName = "#" + ordinal.ToString ();
ordinal++;
}
arguments.Add (argName, argument.Expression);
}
return arguments;
}
public static IEnumerable<string> GetTestFiles ()
{
GetDirectoryPaths (out var rootSourceDir, out _);
foreach (var subDir in Directory.EnumerateDirectories (rootSourceDir, "*", SearchOption.AllDirectories)) {
var subDirName = Path.GetFileName (subDir);
switch (subDirName) {
case "bin":
case "obj":
case "Properties":
case "Dependencies":
case "Individual":
continue;
}
foreach (var file in Directory.EnumerateFiles (subDir, "*.cs")) {
yield return file;
}
}
}
public static (string, string)[] UseMSBuildProperties (params string[] MSBuildProperties)
{
return MSBuildProperties.Select (msbp => ($"build_property.{msbp}", "true")).ToArray ();
}
public static string GetRepoRoot ()
{
return Directory.GetParent (ThisFile ())!.Parent!.Parent!.FullName;
string ThisFile ([CallerFilePath] string path = "") => path;
}
public static string GetMemberSyntaxFullName (MemberDeclarationSyntax member)
{
StringBuilder fullName = new ();
var parent = member.Parent;
while (parent is ClassDeclarationSyntax parentClass) {
fullName.Insert (0, ".");
fullName.Insert (0, parentClass.Identifier.ToString ());
parent = parentClass.Parent;
}
fullName.Append (GetMemberSyntaxName (member));
return fullName.ToString ();
}
public static string GetMemberSyntaxName (MemberDeclarationSyntax member) =>
member switch {
MethodDeclarationSyntax method => method.Identifier.ToString (),
PropertyDeclarationSyntax property => property.Identifier.ToString (),
FieldDeclarationSyntax field => field.Declaration.Variables.Single ().Identifier.ToString (),
EventDeclarationSyntax @event => @event.Identifier.ToString (),
ClassDeclarationSyntax @class => @class.Identifier.ToString (),
ConstructorDeclarationSyntax ctor => ctor.Modifiers.Any (t => t.Text == "static") ? ".cctor" : ".ctor",
_ => "UnknownMember"
};
}
}
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