test: Code view ui tests

testing/code_view/data/single_file_files/reference.h

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+#include "header.h"
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+// TEST: reference navigation switches to file - continued
+// START ----------------------------------------------------------------------
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+// RESULT: This file is visible and scrolled here
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+// ACTION: navigate to next reference to go back
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+// END ------------------------------------------------------------------------
+
+void ref_func()
+{
+	Reference ref;
+}