CppTools: Tests: Fix leaking IAssistProposal and SymbolSearcher

Change-Id: Ic81a5df88d17375cf0087213d84443845bfd38cc
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/cpptools/cpptoolstestcase.h

@@ -41,8 +41,13 @@ namespace CPlusPlus {
 class Document;
 class Snapshot;
 }
+
 namespace Core { class IEditor; }
-namespace TextEditor { class BaseTextEditor; }
+
+namespace TextEditor {
+class BaseTextEditor;
+class IAssistProposal;
+}
 
 namespace CppTools {
 namespace Tests {
@@ -108,6 +113,17 @@ private:
     bool m_writtenSuccessfully;
 };
 
+// Normally the proposal is deleted by the ProcessorRunner or the
+// GenericProposalWidget, but in tests we usually don't make use of them.
+class CPPTOOLS_EXPORT IAssistProposalScopedPointer
+{
+public:
+    IAssistProposalScopedPointer(TextEditor::IAssistProposal *proposal);
+    ~IAssistProposalScopedPointer();
+
+    QScopedPointer<TextEditor::IAssistProposal> d;
+};
+
 } // namespace Tests
 } // namespace CppTools