CppEditor: Tweak test infrastructure

... so we can re-use the "follow symbol" test cases with clangd.

Call Creator like this (clangd needs to be version 12 or later):
$ QTC_CLANGD=<path to clangd> qtcreator -test
'CppEditor,*Follow*,*Switch*' -test 'ClangCodeModel,*dummy*'

During testing, some invalid code in the test cases was uncovered and
fixed.

Change-Id: I9dc650fdba2a27600e6a550420ee873f6fb31d23
Reviewed-by: David Schulz <david.schulz@qt.io>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/plugins/cppeditor/cppeditortestcase.h b/src/plugins/cppeditor/cppeditortestcase.h
index 6eb9821bdd..519b7cbafd 100644
--- a/src/plugins/cppeditor/cppeditortestcase.h
+++ b/src/plugins/cppeditor/cppeditortestcase.h
@@ -62,12 +62,17 @@ public:
     TestCase(bool runGarbageCollector = true);
     ~TestCase();
 
+    void setUseClangd();
+
     static bool openCppEditor(const QString &fileName,
                               CppEditor **editor,
                               CppEditorWidget **editorWidget = 0);
 
     static CPlusPlus::Document::Ptr waitForRehighlightedSemanticDocument(
             CppEditorWidget *editorWidget);
+
+private:
+    const bool m_prevUseClangd;
 };
 
 } // namespace Tests