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test/shared6.test
255 строк6 KB
mistachkin
Add retry logic for AV defense to winOpen. Also, refactor test suite to allow the key Tcl file operations (e.g. copy and delete) to be retried.
02 авг 2011, 04:57
02 авг 2011, 04:57fda06be
# 2009 April 01
#
# 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.
#
#***********************************************************************
#
# $Id: shared6.test,v 1.4 2009/06/05 17:09:12 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !shared_cache { finish_test ; return }

do_test shared6-1.1.1 {
  execsql {
    CREATE TABLE t1(a, b);
    CREATE TABLE t2(c, d);
    CREATE TABLE t3(e, f);
  }
  db close
} {}
do_test shared6-1.1.2 {
  set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
  sqlite3_enable_shared_cache
} {1}

do_test shared6-1.1.3 {
  sqlite3 db1 test.db
  sqlite3 db2 test.db
} {}

# Exclusive shared-cache locks. Test the following:
#
#   1.2.1: If [db1] has an exclusive lock, [db2] cannot read.
#   1.2.2: If [db1] has an exclusive lock, [db1] can read.
#   1.2.3: If [db1] has a non-exclusive write-lock, [db2] can read.
# 
do_test shared6-1.2.1 {
  execsql { SELECT * FROM t1 } db2    ;# Cache a compiled statement
  execsql { BEGIN EXCLUSIVE } db1
  catchsql { SELECT * FROM t1 } db2   ;# Execute the cached compiled statement
} {1 {database table is locked}}
do_test shared6-1.2.2 {
  execsql { SELECT * FROM t1 } db1
} {}
do_test shared6-1.2.3 {
  execsql {
    COMMIT;
    BEGIN;
    INSERT INTO t2 VALUES(3, 4);
  } db1
  execsql { SELECT * FROM t1 } db2
} {}
do_test shared6-1.2.X {
  execsql { COMMIT } db1
} {}

# Regular shared-cache locks. Verify the following:
#
#   1.3.1: If [db1] has a write-lock on t1, [db1] can read from t1.
#   1.3.2: If [db1] has a write-lock on t1, [db2] can read from t2.
#   1.3.3: If [db1] has a write-lock on t1, [db2] cannot read from t1.
#   1.3.4: If [db1] has a write-lock on t1, [db2] cannot write to t1.
#   1.3.5: If [db1] has a read-lock on t1, [db2] can read from t1.
#   1.3.6: If [db1] has a read-lock on t1, [db2] cannot write to t1.
#
do_test shared6-1.3.1 {
  execsql {
    BEGIN;
    INSERT INTO t1 VALUES(1, 2);
  } db1
  execsql { SELECT * FROM t1 } db1
} {1 2}
do_test shared6-1.3.2 {
  execsql { SELECT * FROM t2 } db2
} {3 4}
do_test shared6-1.3.3 {
  catchsql { SELECT * FROM t1 } db2
} {1 {database table is locked: t1}}
do_test shared6-1.3.4 {
  catchsql { INSERT INTO t2 VALUES(1, 2) } db2
} {1 {database table is locked}}
do_test shared6-1.3.5 {
  execsql {
    COMMIT;
    BEGIN;
    SELECT * FROM t1;
  } db1
  execsql { SELECT * FROM t1 } db2
} {1 2}
do_test shared6-1.3.5 {
  catchsql { INSERT INTO t1 VALUES(5, 6) } db2
} {1 {database table is locked: t1}}
do_test shared6-1.3.X {
  execsql { COMMIT } db1
} {}

# Read-uncommitted mode.
#
# For these tests, connection [db2] is in read-uncommitted mode.
#
#   1.4.1: If [db1] has a write-lock on t1, [db2] can still read from t1.
#   1.4.2: If [db1] has a write-lock on the db schema (sqlite_master table), 
#          [db2] cannot read from the schema.
#   1.4.3: If [db1] has a read-lock on t1, [db2] cannot write to t1.
#
do_test shared6-1.4.1 {
  execsql { PRAGMA read_uncommitted = 1 } db2
  execsql {
    BEGIN;
    INSERT INTO t1 VALUES(5, 6);
  } db1
  execsql { SELECT * FROM t1 } db2
} {1 2 5 6}
do_test shared6-1.4.2 {
  execsql { CREATE TABLE t4(a, b) } db1
  catchsql { SELECT * FROM t1 } db2
} {1 {database table is locked}}
do_test shared6-1.4.3 {
  execsql {
    COMMIT;
    BEGIN;
    SELECT * FROM t1;
  } db1
  catchsql { INSERT INTO t1 VALUES(7, 8) } db2
} {1 {database table is locked: t1}}

do_test shared6-1.X {
  db1 close
  db2 close
} {}

#-------------------------------------------------------------------------
# The following tests - shared6-2.* - test that two database connections
# that connect to the same file using different VFS implementations do
# not share a cache.
#
if {$::tcl_platform(platform) eq "unix"} {
  do_test shared6-2.1 {
    sqlite3 db1 test.db -vfs unix
    sqlite3 db2 test.db -vfs unix
    sqlite3 db3 test.db -vfs unix-none
    sqlite3 db4 test.db -vfs unix-none
  } {}

  do_test shared6-2.2 {
    execsql { BEGIN; INSERT INTO t1 VALUES(9, 10); } db1
    catchsql { SELECT * FROM t1 } db2
  } {1 {database table is locked: t1}}
  do_test shared6-2.3 {
    execsql { SELECT * FROM t1 } db3
  } {1 2 5 6}

  do_test shared6-2.3 {
    execsql { COMMIT } db1
    execsql { BEGIN; INSERT INTO t1 VALUES(11, 12); } db3
    catchsql { SELECT * FROM t1 } db4
  } {1 {database table is locked: t1}}

  do_test shared6-2.4 {
    execsql { SELECT * FROM t1 } db1
  } {1 2 5 6 9 10}

  do_test shared6-2.5 {
    execsql { COMMIT } db3
  } {}

  do_test shared6-2.X {
    db1 close
    db2 close
    db3 close
    db4 close
  } {}
}

#-------------------------------------------------------------------------
# Test that it is possible to open an exclusive transaction while 
# already holding a read-lock on the database file. And that it is
# not possible if some other connection holds such a lock.
#
do_test shared6-3.1 {
  sqlite3 db1 test.db
  sqlite3 db2 test.db
  sqlite3 db3 test.db
} {}
db1 eval {SELECT * FROM t1} {
  # Within this block [db1] is holding a read-lock on t1. Test that
  # this means t1 cannot be written by [db2].
  #
  do_test shared6-3.2 {
    catchsql { INSERT INTO t1 VALUES(1, 2) } db2
  } {1 {database table is locked: t1}}

  do_test shared6-3.3 {
    execsql { BEGIN EXCLUSIVE } db1
  } {}
  break
}
do_test shared6-3.4 {
  catchsql { SELECT * FROM t1 } db2
} {1 {database schema is locked: main}}
do_test shared6-3.5 {
  execsql COMMIT db1
} {}
db2 eval {SELECT * FROM t1} {
  do_test shared6-3.6 {
    catchsql { BEGIN EXCLUSIVE } db1
  } {1 {database table is locked}}
  break
}
do_test shared6-3.7 {
  execsql { BEGIN } db1
  execsql { BEGIN } db2
} {}
db2 eval {SELECT * FROM t1} {
  do_test shared6-3.8 {
    catchsql { INSERT INTO t1 VALUES(1, 2) } db1
  } {1 {database table is locked: t1}}
  break
}
do_test shared6-3.9 {
  execsql { BEGIN ; ROLLBACK } db3
} {}
do_test shared6-3.10 {
  catchsql { SELECT * FROM t1 } db3
} {1 {database table is locked}}
do_test shared6-3.X {
  db1 close
  db2 close
  db3 close
} {}

do_test shared6-4.1 {
  #forcedelete test.db test.db-journal
  sqlite3 db1 test.db
  sqlite3 db2 test.db

  set ::STMT [sqlite3_prepare_v2 db1 "SELECT * FROM t1" -1 DUMMY]
  execsql { CREATE TABLE t5(a, b) } db2
} {}
do_test shared6-4.2 {
  sqlite3_finalize $::STMT
} {SQLITE_OK}
do_test shared6-4.X {
  
  db1 close
  db2 close
} {}

sqlite3_enable_shared_cache $::enable_shared_cache
finish_test