public async Task UpdateReturnsChanges()
{
const string Code = @"
_ = GeneratedCode.$$S;
_ = ""Hello world!""";
const string Path = @"Test.cs";
var reference = new TestGeneratorReference(context =>
{
// NOTE: Don't actually do this in a real generator. This is just for test
// code. Do not use this as an example of what to do in production.
var syntax = context.Compilation.SyntaxTrees.Single().GetRoot().DescendantNodes().OfType <LiteralExpressionSyntax>().SingleOrDefault();
if (syntax != null)
{
context.AddSource("GeneratedSource", @"
class GeneratedCode
{
public static string S = " + syntax.ToString() + @";
}");
}
});
TestFile testFile = new TestFile(Path, Code);
TestHelpers.AddProjectToWorkspace(SharedOmniSharpTestHost.Workspace,
"project.csproj",
new[] { "netcoreapp3.1" },
new[] { testFile },
analyzerConfigFiles: null,
otherFiles: null,
ImmutableArray.Create <AnalyzerReference>(reference));
var point = testFile.Content.GetPointFromPosition();
var gotoDefRequest = new GotoDefinitionRequest {
FileName = Path, Line = point.Line, Column = point.Offset
};
var gotoDefResponse = (await SharedOmniSharpTestHost
.GetRequestHandler <GotoDefinitionServiceV2>(OmniSharpEndpoints.V2.GotoDefinition)
.Handle(gotoDefRequest)).Definitions.Single();
var initialContent = await SharedOmniSharpTestHost
.GetRequestHandler <SourceGeneratedFileService>(OmniSharpEndpoints.SourceGeneratedFile)
.Handle(new SourceGeneratedFileRequest()
{
ProjectGuid = gotoDefResponse.SourceGeneratedFileInfo.ProjectGuid,
DocumentGuid = gotoDefResponse.SourceGeneratedFileInfo.DocumentGuid
});
Assert.Contains("Hello world!", initialContent.Source);
var updateRequest = new UpdateSourceGeneratedFileRequest
{
DocumentGuid = gotoDefResponse.SourceGeneratedFileInfo.DocumentGuid,
ProjectGuid = gotoDefResponse.SourceGeneratedFileInfo.ProjectGuid
};
var updateHandler = SharedOmniSharpTestHost.GetRequestHandler <SourceGeneratedFileService>(OmniSharpEndpoints.UpdateSourceGeneratedFile);
var updatedResponse = await updateHandler.Handle(updateRequest);
Assert.Null(updatedResponse.Source);
Assert.Equal(UpdateType.Unchanged, updatedResponse.UpdateType);
var updateBufferHandler = SharedOmniSharpTestHost.GetRequestHandler <UpdateBufferService>(OmniSharpEndpoints.UpdateBuffer);
_ = await updateBufferHandler.Handle(new()
{
FileName = Path,
Buffer = Code.Replace("Hello world!", "Goodbye!")
});
updatedResponse = await updateHandler.Handle(updateRequest);
Assert.Equal(UpdateType.Modified, updatedResponse.UpdateType);
Assert.Contains("Goodbye!", updatedResponse.Source);
Assert.DoesNotContain("Hello world!", updatedResponse.Source);
_ = await updateBufferHandler.Handle(new()
{
FileName = Path,
Buffer = @"_ = GeneratedCode.S;"
});
updatedResponse = await updateHandler.Handle(updateRequest);
Assert.Equal(UpdateType.Deleted, updatedResponse.UpdateType);
Assert.Null(updatedResponse.Source);
}