How do you test code that uses MethodHandles?

Testing code that uses MethodHandles in Java can be a bit tricky due to their dynamic nature. MethodHandles are part of the java.lang.invoke package, and they provide a low-level mechanism for looking up and invoking methods, fields, and constructors dynamically. Below are some approaches to test code using MethodHandles effectively.

Example of Testing MethodHandles


        // Example Java code using MethodHandles
        import java.lang.invoke.MethodHandle;
        import java.lang.invoke.MethodHandles;
        import java.lang.invoke.MethodType;

        public class Example {
            public String greet(String name) {
                return "Hello, " + name;
            }

            public MethodHandle getGreetMethodHandle() throws Throwable {
                MethodType methodType = MethodType.methodType(String.class, String.class);
                MethodHandles.Lookup lookup = MethodHandles.lookup();
                return lookup.findVirtual(Example.class, "greet", methodType);
            }
        }
        
        // Testing the MethodHandle
        public class ExampleTest {
            public static void main(String[] args) throws Throwable {
                Example example = new Example();
                MethodHandle methodHandle = example.getGreetMethodHandle();
                
                String result = (String) methodHandle.invoke(example, "World");
                System.out.println(result); // Outputs: Hello, World
            }
        }

How do you test code that uses MethodHandles?

Example of Testing MethodHandles

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How do you test code that uses MethodHandles?

Example of Testing MethodHandles

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