UA-.NETStandard/Tests/Opc.Ua.SourceGeneration.Stack.Tests/StackGenerationAssemblyTests.cs

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using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using NUnit.Framework;

namespace Opc.Ua.SourceGeneration.Tests
{
    [TestFixture]
    [Category("SourceGenerator")]
    [SetCulture("en-us")]
    [SetUICulture("en-us")]
    public class StackGenerationAssemblyTests
    {
        [Test]
        public void GeneratorWithUnsupportedAssemblyNameReportsError()
        {
            var generator = new StackSourceGenerator();
            var host = new StackSourceGeneratorHoist(generator);

            CSharpCompilation compilation = OptimizationLevel.Debug
                .CreateCompilation("UnknownAssembly")
                .AddCode(
                    new Dictionary<string, string>().WithOpcUaCoreStubs(),
                    LanguageVersion.Latest);

            GeneratorDriver driver = CSharpGeneratorDriver.Create(host);
            driver = driver.RunGeneratorsAndUpdateCompilation(
                compilation,
                out Compilation outputCompilation,
                out ImmutableArray<Diagnostic> diagnostics);

            GeneratorDriverRunResult runResult = driver.GetRunResult();
            GeneratorRunResult generatorResult = runResult.Results[0];

            Assert.That(generatorResult.Exception, Is.Null);
            Assert.That(generatorResult.Diagnostics.Any(d =>
                d.Id == "STACKGEN001"), Is.True);
        }

        [Test]
        public void GeneratorWithOpcUaCoreTypesAssemblyNameProducesModels()
        {
            var generator = new StackSourceGenerator();
            var host = new StackSourceGeneratorHoist(generator);

            CSharpCompilation compilation = OptimizationLevel.Debug
                .CreateCompilation("Opc.Ua.Core.Types")
                .AddCode(
                    new Dictionary<string, string>().WithOpcUaCoreStubs(),
                    LanguageVersion.Latest);

            GeneratorDriver driver = CSharpGeneratorDriver.Create(host);
            driver = driver.RunGeneratorsAndUpdateCompilation(
                compilation,
                out _,
                out _);

            GeneratorDriverRunResult runResult = driver.GetRunResult();
            GeneratorRunResult generatorResult = runResult.Results[0];

            Assert.That(generatorResult.Exception, Is.Null);
            Assert.That(generatorResult.GeneratedSources, Is.Not.Empty);
        }

        [Test]
        public void GeneratorWithOpcUaCoreAssemblyNameProducesStack()
        {
            var generator = new StackSourceGenerator();
            var host = new StackSourceGeneratorHoist(generator);

            CSharpCompilation compilation = OptimizationLevel.Debug
                .CreateCompilation("Opc.Ua.Core")
                .AddCode(
                    new Dictionary<string, string>().WithOpcUaCoreStubs(),
                    LanguageVersion.Latest);

            GeneratorDriver driver = CSharpGeneratorDriver.Create(host);
            driver = driver.RunGeneratorsAndUpdateCompilation(
                compilation,
                out _,
                out _);

            GeneratorDriverRunResult runResult = driver.GetRunResult();
            GeneratorRunResult generatorResult = runResult.Results[0];

            Assert.That(generatorResult.Exception, Is.Null);
            Assert.That(generatorResult.GeneratedSources, Is.Not.Empty);
        }

        [Test]
        public void GeneratorWithOldLanguageVersionReportsError()
        {
            var generator = new StackSourceGenerator();
            var host = new StackSourceGeneratorHoist(generator);

            CSharpCompilation compilation = OptimizationLevel.Debug
                .CreateCompilation("Opc.Ua.Test")
                .AddCode(
                    new Dictionary<string, string>().WithOpcUaCoreStubs(),
                    LanguageVersion.CSharp12);

            GeneratorDriver driver = CSharpGeneratorDriver.Create(host);
            driver = driver.RunGeneratorsAndUpdateCompilation(
                compilation,
                out Compilation outputCompilation,
                out ImmutableArray<Diagnostic> diagnostics);

            GeneratorDriverRunResult runResult = driver.GetRunResult();
            GeneratorRunResult generatorResult = runResult.Results[0];

            Assert.That(generatorResult.Exception, Is.Null);
            Assert.That(generatorResult.Diagnostics.Any(d =>
                d.Id == "STACKGEN001"), Is.True);
            Assert.That(generatorResult.GeneratedSources, Is.Empty);
        }

        [Test]
        public void GeneratorWithReleaseOptimizationProducesOutput()
        {
            var generator = new StackSourceGenerator();
            var host = new StackSourceGeneratorHoist(generator);

            CSharpCompilation compilation = OptimizationLevel.Release
                .CreateCompilation("Opc.Ua.Test")
                .AddCode(
                    new Dictionary<string, string>().WithOpcUaCoreStubs(),
                    LanguageVersion.Latest);

            GeneratorDriver driver = CSharpGeneratorDriver.Create(host);
            driver = driver.RunGeneratorsAndUpdateCompilation(
                compilation,
                out _,
                out _);

            GeneratorDriverRunResult runResult = driver.GetRunResult();
            GeneratorRunResult generatorResult = runResult.Results[0];

            Assert.That(generatorResult.Exception, Is.Null);
            Assert.That(generatorResult.GeneratedSources, Is.Not.Empty);
        }
    }
}