[sql] Import SQLite 3.17.0.

third_party/sqlite/src/test/incrvacuum2.test

 # 2007 May 04
 #
 # The author disclaims copyright to this source code.  In place of
 # a legal notice, here is a blessing:
 #
 #    May you do good and not evil.
 #    May you find forgiveness for yourself and forgive others.
 #    May you share freely, never taking more than you give.
 #
 #***********************************************************************
@@ skipping 116 matching lines @@
   execsql {
     BEGIN;
     DELETE FROM abc;
     PRAGMA incremental_vacuum;
     COMMIT;
   }
 } {}
 
 integrity_check incrvacuum2-3.3
 
-ifcapable wal {
+if {[wal_is_capable]} {
   # At one point, when a specific page was being extracted from the b-tree
   # free-list (e.g. during an incremental-vacuum), all trunk pages that
   # occurred before the specific page in the free-list trunk were being
   # written to the journal or wal file. This is not necessary. Only the 
   # extracted page and the page that contains the pointer to it need to
   # be journalled.
   #
   # This problem was fixed by [d03d63d77e] (just before 3.7.6 release).
   #
   # This test case builds a database containing many free pages. Then runs
@@ skipping 56 matching lines @@
       execsql { PRAGMA wal_checkpoint }
       execsql { PRAGMA incremental_vacuum(1) }
       set newsz [file size test.db-wal]
       if {$newsz>$maxsz} {set maxsz $newsz}
     }
     set maxsz 
   } [expr {32+3*(512+24)}]
 }
 
 finish_test