//
// Verify that intersect() properly handles maps containing extent
// buffers whose positions and limits are not necessarily equal to (resp.)
// 0 and their capacities.
//
// This test recreates the circumstances of a bug observed while testing
// the ExtentBufferStreamer class.
//
@Test
public void testIntersectChopped() {
ByteBuffer b03_06 = ByteBuffer.wrap("def".getBytes());
ByteBuffer b09_12 = ByteBuffer.wrap("jkl".getBytes());
ByteBuffer b15_18 = ByteBuffer.wrap("pqr".getBytes());
ExtentBuffer eb03_06 = new ExtentBuffer(3L, b03_06);
ExtentBuffer eb09_12 = new ExtentBuffer(9L, b09_12);
ExtentBuffer eb15_18 = new ExtentBuffer(15L, b15_18);
ExtentBufferMap fullMap = new ExtentBufferMap();
fullMap.put(eb03_06);
fullMap.put(eb09_12);
fullMap.put(eb15_18);
//
// Shorten the middle buffer in the map.
//
eb09_12.position(1).limit(2);
//
// Intersect fullMap against an extent that will chop up the first
// contained extent buffer and leave the second two intact.
//
ExtentBufferMap choppedMap = fullMap.intersect(new ExtentImpl(4L, 30L));
ExtentBuffer eb = choppedMap.get(9L);
assertNotNull("chopped map should still contain the middle extent", eb);
assertEquals("middle extent should have position 1", eb.position(), 1);
assertEquals("middle extent should have limit 2", eb.limit(), 2);
}
