public void testBounds() throws IOException { BoundsVisitor boundsVisitor1 = new BoundsVisitor(); fc.accepts(boundsVisitor1, null); BoundsVisitor boundsVisitor2 = new BoundsVisitor(); fc2.accepts(boundsVisitor2, null); Envelope env1 = new Envelope(1, 5, 0, 4); CalcResult boundsResult1 = boundsVisitor1.getResult(); assertEquals(env1, boundsResult1.toEnvelope()); Envelope env2 = new Envelope(4, 13, 3, 10); CalcResult boundsResult2 = boundsVisitor2.getResult(); assertEquals(env2, boundsResult2.toEnvelope()); CalcResult boundsResult3 = boundsResult2.merge(boundsResult1); Envelope env3 = new Envelope(1, 13, 0, 10); assertEquals(env3, boundsResult3.toEnvelope()); // test empty collection boundsVisitor1.reset(null); empty.accepts(boundsVisitor1, null); assertEquals(CalcResult.NULL_RESULT, boundsVisitor1.getResult()); // test merge assertSame(boundsResult2, boundsVisitor1.getResult().merge(boundsResult2)); assertSame(boundsResult2, boundsResult2.merge(boundsVisitor1.getResult())); }