Add lazy version of load_java_class

This can be used to test the lazy behaviour of bytecode parsing

Author: thk123

unit/testing-utils/load_java_class.cpp

@@ -18,6 +18,32 @@
 
 #include <java_bytecode/java_bytecode_language.h>
 
+/// Go through the process of loading, type-checking and finalising loading a
+/// specific class file to build the symbol table. The functions are converted
+/// using ci_lazy_methods (equivalent to passing --lazy-methods to JBMC)
+/// \param java_class_name: The name of the class file to load. It should not
+///   include the .class extension.
+/// \param class_path: The path to load the class from. Should be relative to
+///   the unit directory.
+/// \param main: The name of the main function or "" to use the default
+///   behaviour to find a main function.
+/// \return The symbol table that is generated by parsing this file.
+symbol_tablet load_java_class_lazy(
+  const std::string &java_class_name,
+  const std::string &class_path,
+  const std::string &main)
+{
+  free_form_cmdlinet lazy_command_line;
+  lazy_command_line.add_flag("lazy-methods");
+
+  return load_java_class(
+    java_class_name,
+    class_path,
+    main,
+    new_java_bytecode_language(),
+    lazy_command_line);
+}
+
 /// Go through the process of loading, type-checking and finalising loading a
 /// specific class file to build the symbol table.
 /// \param java_class_name: The name of the class file to load. It should not

unit/testing-utils/load_java_class.h

@@ -38,4 +38,9 @@ symbol_tablet load_java_class(
   std::unique_ptr<languaget> &&java_lang,
   const cmdlinet &command_line);
 
+symbol_tablet load_java_class_lazy(
+  const std::string &java_class_name,
+  const std::string &class_path,
+  const std::string &main);
+
 #endif // CPROVER_TESTING_UTILS_LOAD_JAVA_CLASS_H