VarargsTest.java

package bsh;

import org.junit.Assert;
import org.junit.Test;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class VarargsTest {

	@Test
	public void calling_java_varargs_method_should_be_possible() throws Exception {
		final Interpreter interpreter = new Interpreter();
		interpreter.set("helper", new ClassWithVarargMethods());
		@SuppressWarnings({"unchecked"})
		final List<Object> list = (List<Object>) interpreter.eval("helper.list(1,2,3)");
		Assert.assertEquals(Arrays.<Object>asList(1,2,3), list);
	}


	@Test
	public void calling_java_varargs_wit_old_syntax_should_be_possible() throws Exception {
		final Interpreter interpreter = new Interpreter();
		interpreter.set("helper", new ClassWithVarargMethods());
		@SuppressWarnings({"unchecked"})
		final List<Object> list = (List<Object>) interpreter.eval("helper.list(new Object[] {1,2,3})");
		Assert.assertEquals(Arrays.<Object>asList(1,2,3), list);
	}


	public static class ClassWithVarargMethods {

		public List<Object> list(final Object ... args) {
			return new ArrayList<Object>(Arrays.asList(args));
		}


		public List<Object> list(final List<Object> list, final Object ... args) {
			list.addAll(Arrays.asList(args));
			return list;
		}
	}
}