@Test
public void testGetFileString()
{

    assertEquals("Eurasia/N49E011", instance.getFileString(49, 11));
    assertEquals("Eurasia/N52W002", instance.getFileString(52.268157, -1.230469));
    assertEquals("Africa/S06E034", instance.getFileString(-5.965754, 34.804687));
    assertEquals("Australia/S29E131", instance.getFileString(-28.304381, 131.484375));
    assertEquals("South_America/S09W045", instance.getFileString(-9, -45));
    assertEquals("South_America/S10W046", instance.getFileString(-9.1, -45.1));
    assertEquals("South_America/S10W045", instance.getFileString(-9.6, -45));
    assertEquals("South_America/S28W071", instance.getFileString(-28, -71));
    assertEquals("South_America/S29W072", instance.getFileString(-28.88316, -71.070557));
}