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Annotation of embedaddon/sqlite3/test/tkt4018.test, revision 1.1.1.1

1.1       misho       1: # 2009 August 20
                      2: #
                      3: # The author disclaims copyright to this source code.  In place of
                      4: # a legal notice, here is a blessing:
                      5: #
                      6: #    May you do good and not evil.
                      7: #    May you find forgiveness for yourself and forgive others.
                      8: #    May you share freely, never taking more than you give.
                      9: #
                     10: #***********************************************************************
                     11: # This file implements regression tests for SQLite library.
                     12: #
                     13: # This file implements tests to verify that ticket #4018 has been
                     14: # fixed.  
                     15: #
                     16: 
                     17: set testdir [file dirname $argv0]
                     18: source $testdir/tester.tcl
                     19: 
                     20: proc testsql {sql} {
                     21:   set fd [open tf_main.tcl w]
                     22:   puts $fd [subst -nocommands {
                     23:     sqlite3_test_control_pending_byte 0x0010000
                     24:     sqlite3 db test.db
                     25:     set rc [catch { db eval {$sql} } msg]
                     26:     puts -nonewline "[set rc] {[set msg]}"
                     27:     flush stdout
                     28:     exit
                     29:   }]
                     30:   close $fd
                     31:   set fd [open "| [info nameofexec] ./tf_main.tcl" r] 
                     32:   set res [read $fd]
                     33:   close $fd
                     34:   return $res
                     35: }
                     36: 
                     37: do_test tkt4018-1.1 {
                     38:   execsql {
                     39:     CREATE TABLE t1(a, b);
                     40:     BEGIN;
                     41:     SELECT * FROM t1;
                     42:   }
                     43: } {}
                     44: 
                     45: # The database is locked by connection [db]. Open and close a second
                     46: # connection to test.db 10000 times. If file-descriptors are not being
                     47: # reused, then the process will quickly exceed its maximum number of
                     48: # file descriptors (1024 by default on linux).
                     49: do_test tkt4018-1.2 {
                     50:   for {set i 0} {$i < 10000} {incr i} {
                     51:     sqlite3 db2 test.db
                     52:     db2 close
                     53:   }
                     54: } {}
                     55: 
                     56: # Now check that connection [db] is still holding a SHARED lock by
                     57: # having a second process try to write the db.
                     58: do_test tkt4018-1.3 {
                     59:   testsql {INSERT INTO t1 VALUES(3, 4)}
                     60: } {1 {database is locked}}
                     61: 
                     62: # Sanity checking. Have [db] release the lock and then retry the
                     63: # INSERT from the previous test case.
                     64: do_test tkt4018-1.4 {
                     65:   db eval COMMIT
                     66:   testsql {INSERT INTO t1 VALUES(3, 4)}
                     67: } {0 {}}
                     68: 
                     69: # Check that reusing a file descriptor cannot change a read-only 
                     70: # connection into a read-write connection.
                     71: do_test tkt4018-2.1 {
                     72:   sqlite3 db2 test.db
                     73:   execsql {INSERT INTO t1 VALUES(1, 2)} db2
                     74: } {}
                     75: do_test tkt4018-2.2 {
                     76:   execsql {
                     77:     BEGIN;
                     78:     SELECT * FROM t1 ORDER BY a;
                     79:   }
                     80: } {1 2 3 4}
                     81: do_test tkt4018-2.3 {
                     82:   db2 close
                     83:   sqlite3 db2 test.db -readonly 1
                     84:   execsql COMMIT
                     85:   catchsql {INSERT INTO t1 VALUES(5, 6)} db2
                     86: } {1 {attempt to write a readonly database}}
                     87: db2 close
                     88: 
                     89: finish_test