public static async Task <TSyntax> FromTemplate <TSyntax>(TemplateProvider provider, string name, object templateData = null)
where TSyntax : CSharpSyntaxNode
{
provider = provider ?? throw new ArgumentNullException(nameof(provider));
name = name ?? throw new ArgumentNullException(name, nameof(name));
string template = await provider.ReadTemplate(name, templateData);
if (string.IsNullOrEmpty(template))
{
throw new ArgumentException($"The template provided by '{name}' does not represent a valid C# syntax tree.");
}
var tree = CSharpSyntaxTree.ParseText(template);
var root = tree.GetRootAsync();
if (root.Result is CompilationUnitSyntax compilationUnit)
{
var member = compilationUnit.Members.OfType <TSyntax>().FirstOrDefault();
if (member is object)
{
return(member);
}
}
throw new InvalidOperationException($"The template does not represent a {typeof(TSyntax).Name}.");
}
public async Task FromTemplate_ReturnsTemplate_AsTargetSyntax()
{
// Arrange
var provider = TemplateProvider.FromAssembly(
typeof(CodeGenStructTests).Assembly,
"Alium.CodeGeneration");
// Act
var @class = await CodeGen.FromTemplate <ClassDeclarationSyntax>(provider, "TestClass");
// Assert
Assert.NotNull(@class);
}
