TestDataFromName.java

import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestName;

import static org.junit.Assert.assertEquals;

public class TestDataFromName
{
	@Rule
	public TestName testName = new TestName();

	@Test
	public void testHello_Aaron()
	{

		// use TestName Rule to get the current method name
		String methodName = testName.getMethodName();

		// get everything after the underscore
		String parameter = methodName.substring(methodName.indexOf("_")+1);

		// execute code to test
		String result = greeting(parameter);

		// check result
		assertEquals(result, "Hello, Aaron");
	}

	public String greeting(String name) {
		if (name == null)
		{
			name = "World";
		}

		return "Hello, " + name;
	}
}