ensure robustness against malformed runtime class name

TestComponentCSharp/Class.cpp

@@ -1274,16 +1274,16 @@ namespace winrt::TestComponentCSharp::implementation
  throw hresult_not_implemented();
  }
 
- struct native_properties1 : winrt::implements<native_properties1, TestComponentCSharp::IProperties1>
+ TestComponentCSharp::IProperties1 Class::NativeProperties1()
  {
- int32_t ReadWriteProperty()
+ struct native_properties1 : winrt::implements<native_properties1, TestComponentCSharp::IProperties1>
  {
- return 42;
- }
- };
+ int32_t ReadWriteProperty()
+ {
+ return 42;
+ }
+ };
 
- TestComponentCSharp::IProperties1 Class::NativeProperties1()
- {
  return winrt::make<native_properties1>();
  }
 
@@ -1293,17 +1293,17 @@ namespace winrt::TestComponentCSharp::implementation
  virtual HRESULT __stdcall GetService(int32_t* type, int32_t* service) noexcept = 0;
  };
 
- struct service_provider : winrt::implements<service_provider, WF::IInspectable, IServiceProviderInterop>
+ WF::IInspectable Class::ServiceProvider()
  {
- HRESULT __stdcall GetService(int32_t* type, int32_t* service) noexcept override
+ struct service_provider : winrt::implements<service_provider, WF::IInspectable, IServiceProviderInterop>
  {
- *service = 42;
- return 0;
- }
- };
+ HRESULT __stdcall GetService(int32_t* type, int32_t* service) noexcept override
+ {
+ *service = 42;
+ return 0;
+ }
+ };
 
- WF::IInspectable Class::ServiceProvider()
- {
  return winrt::make<service_provider>();
  }
 
@@ -1330,5 +1330,18 @@ namespace winrt::TestComponentCSharp::implementation
  DataErrorsChangedEventArgs args(detach_abi(mock), take_ownership_from_abi_t());
  _dataErrorsChanged(*this, args);
  }
+
+ WF::IInspectable Class::BadRuntimeClassName()
+ {
+ struct bad_runtime_classname : winrt::implements<bad_runtime_classname, WF::IInspectable>
+ {
+ hstring GetRuntimeClassName()
+ {
+ return L"BadRuntimeClassName<T>";
+ }
+ };
+
+ return winrt::make<bad_runtime_classname>();
+ }
 }
 

TestComponentCSharp/Class.h

@@ -336,6 +336,8 @@ namespace winrt::TestComponentCSharp::implementation
  void ErrorsChanged(winrt::event_token const& token) noexcept;
  Windows::Foundation::Collections::IIterable<Windows::Foundation::IInspectable> GetErrors(hstring const& propertyName);
  void RaiseDataErrorChanged();
+
+ static Windows::Foundation::IInspectable BadRuntimeClassName();
  };
 }
 

TestComponentCSharp/TestComponentCSharp.idl

@@ -330,6 +330,8 @@ namespace TestComponentCSharp
 
  // INotifyDataErrorInfo
  void RaiseDataErrorChanged();
+
+ static Object BadRuntimeClassName{ get; };
  }
 
  [threading(sta), marshaling_behavior(standard)]

UnitTest/TestComponentCSharp_Tests.cs

@@ -478,8 +478,11 @@ public void TestCustomProjections()
  IntPtr service;
  serviceProvider.GetService(IntPtr.Zero, out service);
  Assert.Equal(new IntPtr(42), service);
- }
 
+ // Ensure robustness with bad runtime class names (parsing errors, type not found, etc)
+ var badRuntimeClassName = Class.BadRuntimeClassName;
+ Assert.NotNull(badRuntimeClassName);
+ }
 
  [Fact]
  public void TestKeyValuePair()