/** Unit test for HeapFile.readPage() */
@Test
public void readPage() throws Exception {
HeapPageId pid = new HeapPageId(hf.getId(), 0);
HeapPage page = (HeapPage) hf.readPage(pid);
// NOTE(ghuo): we try not to dig too deeply into the Page API here; we
// rely on HeapPageTest for that. perform some basic checks.
assertEquals(484, page.getNumEmptySlots());
assertTrue(page.isSlotUsed(1));
assertFalse(page.isSlotUsed(20));
}
/** Unit test for HeapFile.getId() */
@Test
public void getId() throws Exception {
int id = hf.getId();
// NOTE(ghuo): the value could be anything. test determinism, at least.
assertEquals(id, hf.getId());
assertEquals(id, hf.getId());
HeapFile other = SystemTestUtil.createRandomHeapFile(1, 1, null, null);
assertTrue(id != other.getId());
}
public void open() throws DbException, TransactionAbortedException {
// some code goes here
if (i_pos != null) {
i = i_pos;
} else {
Catalog gc = Database.getCatalog();
HeapFile file = (HeapFile) gc.getDbFile(tableid);
i = file.iterator(tid);
}
i.open();
}
public HeapFileIterator(TransactionId tid, HeapFile file) {
_transactionId = tid;
_file = file;
_currentPageId = 0;
_numPages = _file.numPages();
// System.out.println("numpages "+_numPages);
}
@Test
public void testIteratorClose() throws Exception {
// make more than 1 page. Previous closed iterator would start fetching
// from page 1.
HeapFile twoPageFile = SystemTestUtil.createRandomHeapFile(2, 520, null, null);
DbFileIterator it = twoPageFile.iterator(tid);
it.open();
assertTrue(it.hasNext());
it.close();
try {
it.next();
fail("expected exception");
} catch (NoSuchElementException e) {
}
// close twice is harmless
it.close();
}
private Page readPage(int pageNumber)
throws DbException, TransactionAbortedException, IOException {
// File == table because we do one file per table
// System.out.println("readpage:"+_file.id()+" page:"+pageNumber);
int tableId = _file.id();
int pageId = pageNumber;
// System.out.println("Page is now "+pageNumber);
HeapPageId pid = new HeapPageId(tableId, pageId);
return Database.getBufferPool().getPage(_transactionId, pid, Permissions.READ_ONLY);
}
@Test
public void testIteratorBasic() throws Exception {
HeapFile smallFile = SystemTestUtil.createRandomHeapFile(2, 3, null, null);
DbFileIterator it = smallFile.iterator(tid);
// Not open yet
assertFalse(it.hasNext());
try {
it.next();
fail("expected exception");
} catch (NoSuchElementException e) {
}
it.open();
int count = 0;
while (it.hasNext()) {
System.out.println(count);
assertNotNull(it.next());
count += 1;
}
assertEquals(3, count);
it.close();
}
/** Unit test for HeapFile.numPages() */
@Test
public void numPages() throws Exception {
assertEquals(1, hf.numPages());
// assertEquals(1, empty.numPages());
}
/** Unit test for HeapFile.getTupleDesc() */
@Test
public void getTupleDesc() throws Exception {
assertEquals(td, hf.getTupleDesc());
}