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Merge pull request #35 from AaronRobinsonMSFT/failure_test_case
Failure test cases.
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DllImportGenerator/DllImportGenerator.Test/CompileFails.cs
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using Microsoft.CodeAnalysis; | ||
using System.Collections.Generic; | ||
using Xunit; | ||
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namespace DllImportGenerator.Test | ||
{ | ||
public class CompileFails | ||
{ | ||
public static IEnumerable<object[]> CodeSnippetsToCompile() | ||
{ | ||
yield return new object[] { CodeSnippets.UserDefinedPrefixedAttributes, 3 }; | ||
} | ||
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[Theory] | ||
[MemberData(nameof(CodeSnippetsToCompile))] | ||
public void ValidateSnippets(string source, int failCount) | ||
{ | ||
Compilation comp = TestUtils.CreateCompilation(source); | ||
TestUtils.AssertPreSourceGeneratorCompilation(comp); | ||
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var newComp = TestUtils.RunGenerators(comp, out var generatorDiags, new Microsoft.Interop.DllImportGenerator()); | ||
Assert.Empty(generatorDiags); | ||
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var newCompDiags = newComp.GetDiagnostics(); | ||
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// Verify the compilation failed with missing impl. | ||
int missingImplCount = 0; | ||
foreach (var diag in newCompDiags) | ||
{ | ||
if ("CS8795".Equals(diag.Id)) | ||
{ | ||
missingImplCount++; | ||
} | ||
} | ||
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Assert.Equal(failCount, missingImplCount); | ||
} | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
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using Microsoft.CodeAnalysis; | ||
using Microsoft.CodeAnalysis.CSharp; | ||
using System.Collections.Immutable; | ||
using System.Linq; | ||
using System.Reflection; | ||
using Xunit; | ||
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namespace DllImportGenerator.Test | ||
{ | ||
internal static class TestUtils | ||
{ | ||
/// <summary> | ||
/// Assert the pre-srouce generator compilation has only | ||
/// the expected failure diagnostics. | ||
/// </summary> | ||
/// <param name="comp"></param> | ||
public static void AssertPreSourceGeneratorCompilation(Compilation comp) | ||
{ | ||
var compDiags = comp.GetDiagnostics(); | ||
foreach (var diag in compDiags) | ||
{ | ||
Assert.True( | ||
"CS8795".Equals(diag.Id) // Partial method impl missing | ||
|| "CS0234".Equals(diag.Id) // Missing type or namespace - GeneratedDllImportAttribute | ||
|| "CS0246".Equals(diag.Id) // Missing type or namespace - GeneratedDllImportAttribute | ||
|| "CS8019".Equals(diag.Id)); // Unnecessary using | ||
} | ||
} | ||
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/// <summary> | ||
/// Create a compilation given source | ||
/// </summary> | ||
/// <param name="source">Source to compile</param> | ||
/// <param name="outputKind">Output type</param> | ||
/// <returns>The resulting compilation</returns> | ||
public static Compilation CreateCompilation(string source, OutputKind outputKind = OutputKind.DynamicallyLinkedLibrary) | ||
=> CSharpCompilation.Create("compilation", | ||
new[] { CSharpSyntaxTree.ParseText(source, new CSharpParseOptions(LanguageVersion.Preview)) }, | ||
new[] { MetadataReference.CreateFromFile(typeof(Binder).GetTypeInfo().Assembly.Location) }, | ||
new CSharpCompilationOptions(outputKind)); | ||
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/// <summary> | ||
/// Run the supplied generators on the compilation. | ||
/// </summary> | ||
/// <param name="comp">Compilation target</param> | ||
/// <param name="diagnostics">Resulting diagnostics</param> | ||
/// <param name="generators">Source generator instances</param> | ||
/// <returns>The resulting compilation</returns> | ||
public static Compilation RunGenerators(Compilation comp, out ImmutableArray<Diagnostic> diagnostics, params ISourceGenerator[] generators) | ||
{ | ||
CreateDriver(comp, generators).RunFullGeneration(comp, out var d, out diagnostics); | ||
return d; | ||
} | ||
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private static GeneratorDriver CreateDriver(Compilation c, params ISourceGenerator[] generators) | ||
=> new CSharpGeneratorDriver(c.SyntaxTrees.First().Options, | ||
ImmutableArray.Create(generators), | ||
null, | ||
ImmutableArray<AdditionalText>.Empty); | ||
} | ||
} |
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