Method setUp

test/simpledb/LockingTest.java:30–59

Set up initial resources for each unit test.

()

   * Set up initial resources for each unit test.
   */
  @Before public void setUp() throws Exception {
    super.setUp();

    // clear all state from the buffer pool
    bp = Database.resetBufferPool(BufferPool.DEFAULT_PAGES);

    // create a new empty HeapFile and populate it with three pages.
    // we should be able to add 504 tuples on an empty page.
    TransactionId tid = new TransactionId();
    for (int i = 0; i < 1025; ++i) {
      empty.insertTuple(tid, Utility.getHeapTuple(i, 2));
    }

    // if this fails, complain to the TA
    assertEquals(3, empty.numPages());

    this.p0 = new HeapPageId(empty.getId(), 0);
    this.p1 = new HeapPageId(empty.getId(), 1);
      PageId p2 = new HeapPageId(empty.getId(), 2);
    this.tid1 = new TransactionId();
    this.tid2 = new TransactionId();

    // forget about locks associated to tid, so they don't conflict with
    // test cases
    bp.getPage(tid, p0, Permissions.READ_WRITE).markDirty(true, tid);
    bp.getPage(tid, p1, Permissions.READ_WRITE).markDirty(true, tid);
    bp.getPage(tid, p2, Permissions.READ_WRITE).markDirty(true, tid);
    bp.flushAllPages();
    bp = Database.resetBufferPool(BufferPool.DEFAULT_PAGES);
  }

  /**
   * Generic unit test structure for BufferPool.getPage() assuming locking.