Clang: Add a disabled test for highlighting

In the example below, "var" is highlighted as a function, but it should
be highlighted as a local variable.

  struct OtherOperator { void operator()(int); };
  void g(OtherOperator o, int var)
  {
      o(var);
  }

This is due to a libclang bug.

Change-Id: I7c9fcad6f16c25191d31fc330e969ebd282d4869
Reviewed-by: David Schulz <david.schulz@qt.io>

tests/unit/unittest/data/highlightingmarks.cpp

@@ -559,3 +559,9 @@ using N::goo;
 #endif
 
 #include <new>
+
+struct OtherOperator { void operator()(int); };
+void g(OtherOperator o, int var)
+{
+    o(var);
+}

tests/unit/unittest/highlightingmarks-test.cpp

@@ -1135,6 +1135,14 @@ TEST_F(HighlightingMarks, PreprocessorInclusionDirectiveWithKeyword)
     ASSERT_THAT(infos[3], HasOnlyType(HighlightingType::StringLiteral));
 }
 
+// This test should pass once https://bugs.llvm.org//show_bug.cgi?id=12972 is resolved.
+TEST_F(HighlightingMarks, DISABLED_VariableInOperatorFunctionCall)
+{
+    const auto infos = translationUnit.highlightingMarksInRange(sourceRange(566, 12));
+
+    ASSERT_THAT(infos[2], HasOnlyType(HighlightingType::LocalVariable));
+}
+
 Data *HighlightingMarks::d;
 
 void HighlightingMarks::SetUpTestCase()