gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/rdonly.test (about)

     1  # 2007 April 24
     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 make sure SQLite treats a database
    14  # as readonly if its write version is set to  high.
    15  #
    16  # $Id: rdonly.test,v 1.2 2008/07/08 10:19:58 danielk1977 Exp $
    17  
    18  set testdir [file dirname $argv0]
    19  source $testdir/tester.tcl
    20  
    21  # Do not use a codec for tests in this file, as the database file is
    22  # manipulated directly using tcl scripts (using the [hexio_write] command).
    23  #
    24  do_not_use_codec
    25  
    26  # Create a database.
    27  #
    28  do_test rdonly-1.1 {
    29    execsql {
    30      CREATE TABLE t1(x);
    31      INSERT INTO t1 VALUES(1);
    32      SELECT * FROM t1;
    33    }
    34  } {1}
    35  
    36  # EVIDENCE-OF: R-29639-16887 The sqlite3_db_readonly(D,N) interface
    37  # returns 1 if the database N of connection D is read-only, 0 if it is
    38  # read/write, or -1 if N is not the name of a database on connection D.
    39  #
    40  do_test rdonly-1.1.1 {
    41    sqlite3_db_readonly db main
    42  } {0}
    43  
    44  # Changes the write version from 1 to 3.  Verify that the database
    45  # can be read but not written.
    46  #
    47  do_test rdonly-1.2 {
    48    db close
    49    hexio_get_int [hexio_read test.db 18 1]
    50  } 1
    51  do_test rdonly-1.3 {
    52    hexio_write test.db 18 03
    53    sqlite3 db test.db
    54    execsql {
    55      SELECT * FROM t1;
    56    }
    57  } {1}
    58  do_test rdonly-1.3.1 {
    59    sqlite3_db_readonly db main
    60  } {1}
    61  do_test rdonly-1.4 {
    62    catchsql {
    63      INSERT INTO t1 VALUES(2)
    64    }
    65  } {1 {attempt to write a readonly database}}
    66  
    67  # Change the write version back to 1.  Verify that the database
    68  # is read-write again.
    69  #
    70  do_test rdonly-1.5 {
    71    db close
    72    hexio_write test.db 18 01
    73    sqlite3 db test.db
    74    catchsql {
    75      INSERT INTO t1 VALUES(2);
    76      SELECT * FROM t1;
    77    }
    78  } {0 {1 2}}
    79  
    80  # Now, after connection [db] has loaded the database schema, modify the
    81  # write-version of the file (and the change-counter, so that the 
    82  # write-version is reloaded). This way, SQLite does not discover that
    83  # the database is read-only until after it is locked.
    84  #
    85  set ro_version 02
    86  ifcapable wal { set ro_version 03 }
    87  do_test rdonly-1.6 {
    88    hexio_write test.db 18 $ro_version     ; # write-version
    89    hexio_write test.db 24 11223344        ; # change-counter
    90    catchsql {
    91      INSERT INTO t1 VALUES(2);
    92    }
    93  } {1 {attempt to write a readonly database}}
    94  
    95  finish_test