@Test
public void testAdditionalProperty() {

  Properties p = new Properties();
  p.put("p2", "v2");
  MockInterpreterA intp = new MockInterpreterA(p);
  assertEquals(2, intp.getProperty().size());
  assertEquals("v1", intp.getProperty().get("p1"));
  assertEquals("v1", intp.getProperty("p1"));
  assertEquals("v2", intp.getProperty().get("p2"));
  assertEquals("v2", intp.getProperty("p2"));
}