Unit utility for symbol types

Author: thk123

unit/testing-utils/require_type.cpp

@@ -289,3 +289,19 @@ require_type::require_java_non_generic_class(const typet &class_type)
 
   return java_class_type;
 }
+
+/// Verify a given type is a symbol type, optionally with a specific identifier
+/// \param type: The type to check
+/// \param identifier: The identifier the symbol type should have
+/// \return The cast version of the input type
+const symbol_typet &
+require_type::require_symbol(const typet &type, const irep_idt &identifier)
+{
+  REQUIRE(type.id() == ID_symbol);
+  const symbol_typet &result = to_symbol_type(type);
+  if(identifier != "")
+  {
+    REQUIRE(result.get_identifier() == identifier);
+  }
+  return result;
+}

unit/testing-utils/require_type.h

@@ -25,6 +25,9 @@ namespace require_type
 pointer_typet
 require_pointer(const typet &type, const optionalt<typet> &subtype);
 
+const symbol_typet &
+require_symbol(const typet &type, const irep_idt &identifier = "");
+
 struct_typet::componentt require_component(
   const struct_typet &struct_type,
   const irep_idt &component_name);