@Test
public void testExec2() {

    NodeValue v = NodeValue.makeNode("<http://www.opengis.net/def/crs/EPSG/0/27700> LINESTRING(0 0, 10 10, 5 5)", WKTDatatype.INSTANCE);
    ConvexHullFF instance = new ConvexHullFF();
    NodeValue expResult = NodeValue.makeNode("<http://www.opengis.net/def/crs/EPSG/0/27700> LINESTRING(0 0, 10 10)", WKTDatatype.INSTANCE);
    NodeValue result = instance.exec(v);
    assertEquals(expResult, result);
}