stasis-aries-wal/test/lladd/check_operations.c

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---*/
#include <config.h>
#include <check.h>
#include <assert.h>

#include <lladd/transactional.h>
#include <lladd/bufferManager.h>

#include "../check_includes.h"

#define LOG_NAME   "check_operations.log"
/**
   Assuming that the Tset() operation is implemented correctly, checks
   that doUpdate, redoUpdate and undoUpdate are working correctly, for
   operations that use physical logging.

   @todo Now that writes + lsn updates are atomic, this test case probably breaks. 
*/
START_TEST(operation_physical_do_undo) {
  int xid = 1;
  recordid rid;
  lsn_t lsn = 2;
  int buf;
  int arg;
  LogEntry * setToTwo;

  Tinit();
  
  rid  = ralloc(xid, 1, sizeof(int));
  buf = 1;
  arg = 2;

  DEBUG("A\n");
  setToTwo = allocUpdateLogEntry(-1, xid, OPERATION_SET, rid, (void*)&arg, sizeof(int), (void*)&buf);

  /* Do, undo and redo operation without updating the LSN field of the page. */

  /*  writeLSN(lsn, rid.page); */
  DEBUG("B\n");
  writeRecord(xid, lsn, rid, &buf);

  setToTwo->LSN = 10;
  
  DEBUG("C\n");
  doUpdate(setToTwo);  /* PAGE LSN= 10, value = 2. */

  readRecord(xid, rid, &buf);

  fail_unless(buf == 2, NULL);



  DEBUG("D\n");

  fail_unless(10 == readLSN(rid.page), "page lsn not set correctly.");

  setToTwo->LSN = 5;

  undoUpdate(setToTwo, 8);  /* Should succeed, CLR LSN is too low, but undoUpdate only checks the log entry. */

  readRecord(xid, rid, &buf);

  fail_unless(buf == 1, NULL);
  
  DEBUG("E\n");
  redoUpdate(setToTwo);
  

  readRecord(xid, rid, &buf);

  fail_unless(buf == 1, NULL);
  
  /*  writeLSN(3,rid.page); */

  /* Now, simulate scenarios from normal operation:
         do the operation, and update the LSN, (update happens)
	 then undo, and update the LSN again.  (undo happens)
	 attempt a redo, don't update lsn      (nothing happens)

     Lower the LSN
         attempt redo                          (redo succeeds)

  */

  lsn = 0;
  buf = 1;

  /*  writeLSN(lsn, rid.page); */
  writeRecord(xid, lsn, rid, &buf);

  /* Trace of test: 

  PAGE LSN     LOG LSN      CLR LSN    TYPE        SUCCEED?
              
  2             10          -          do write    YES      (C) 
  10             5          8          undo write  YES      (D)
  8              5          -          redo write  NO       (E)
  8             10          -          redo write  YES      (F)
 .......  and so on.
  */


  setToTwo->LSN = 10;
  
  DEBUG("F\n");
  redoUpdate(setToTwo);
  /*  writeLSN(setToTwo->LSN, rid.page); */

  readRecord(xid, rid, &buf);

  fail_unless(buf == 2, NULL);

  DEBUG("G undo set to 2\n");
  undoUpdate(setToTwo, 20);        /* Succeeds -- 20 is the 'CLR' entry's lsn.*/

  readRecord(xid, rid, &buf);

  fail_unless(buf == 1, NULL);
  
  DEBUG("H don't redo set to 2\n");
  redoUpdate(setToTwo);        /* Fails */

  readRecord(xid, rid, &buf);

  fail_unless(buf == 1, NULL);
  

  writeRecord(xid, 0, rid, &buf); /* reset the page's LSN. */
  /*  writeLSN(0,rid.page); */

  DEBUG("I redo set to 2\n");
  redoUpdate(setToTwo);        /* Succeeds */

  readRecord(xid, rid, &buf);

  fail_unless(buf == 2, NULL);

  Tdeinit();
}
END_TEST


/** 
  Add suite declarations here
*/
Suite * check_suite(void) {
  Suite *s = suite_create("operations");
  /* Begin a new test */
  TCase *tc = tcase_create("operations_simple");

  /* Sub tests are added, one per line, here */
  tcase_add_test(tc, operation_physical_do_undo);

  /* --------------------------------------------- */
  tcase_add_checked_fixture(tc, setup, teardown);
  suite_add_tcase(s, tc);


  return s;
}

#include "../check_setup.h"