ClangTools: Simplify clazy test

...in order to not run into parse errors in qstring.h involving

  * C++17
  * >= Qt 5.14
  * stdlibc++ of gcc 5.3/5.4

Change-Id: I8c06f90a88a4dd18503a81b68433604eb3bc9556
Reviewed-by: Cristian Adam <cristian.adam@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/clangtools/clangtoolsunittests.cpp

@@ -159,7 +159,7 @@ void ClangToolsUnitTests::testProject_data()
     // Test that tidy and clazy diagnostics are emitted for the same project.
     addTestRow("clangtidy_clazy/clangtidy_clazy.pro",
                1 /*tidy*/ + 1 /*clazy*/,
-               configFor("misc-unconventional-assign-operator", "base-class-event"));
+               configFor("misc-unconventional-assign-operator", "qgetenv"));
 }
 
 void ClangToolsUnitTests::addTestRow(const QByteArray &relativeFilePath,

src/plugins/clangtools/unit-tests/clangtidy_clazy/clazy_example.cpp

@@ -23,19 +23,11 @@
 **
 ****************************************************************************/
 
-#include <QCoreApplication>
+#include <QByteArray>
+#include <QtGlobal>
 
-// -Wclazy-ctor-missing-parent-argument
-class TestObject : public QObject
+void test()
 {
-    Q_OBJECT
-
-public:
-    TestObject();
-
-    bool event(QEvent *) override
-    {
-        // -Wclazy-base-class-event
-        return false;
-    }
-};
+    // -Wclazy-qgetenv
+    qgetenv("Foo").isEmpty();
+}