modernc.org/cc@v1.0.1/v2/testdata/_sqlite/test/substr.test (about)

     1  # 2007 May 14
     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.  The
    12  # focus of this file is testing the built-in SUBSTR() functions.
    13  #
    14  # $Id: substr.test,v 1.7 2009/02/03 13:10:54 drh Exp $
    15  
    16  set testdir [file dirname $argv0]
    17  source $testdir/tester.tcl
    18  
    19  ifcapable !tclvar {
    20    finish_test
    21    return
    22  }
    23  
    24  # Create a table to work with.
    25  #
    26  execsql { 
    27    CREATE TABLE t1(t text, b blob)
    28  }
    29  proc substr-test {id string i1 i2 result} {
    30    db eval {
    31      DELETE FROM t1;
    32      INSERT INTO t1(t) VALUES($string)
    33    }
    34    do_test substr-$id.1 [subst {
    35      execsql {
    36        SELECT substr(t, $i1, $i2) FROM t1
    37      }
    38    }] [list $result]
    39    set qstr '[string map {' ''} $string]'
    40    do_test substr-$id.2 [subst {
    41      execsql {
    42        SELECT substr($qstr, $i1, $i2)
    43      }
    44    }] [list $result]
    45  }
    46  proc subblob-test {id hex i1 i2 hexresult} {
    47    db eval "
    48      DELETE FROM t1;
    49      INSERT INTO t1(b) VALUES(x'$hex')
    50    "
    51    do_test substr-$id.1 [subst {
    52      execsql {
    53        SELECT hex(substr(b, $i1, $i2)) FROM t1
    54      }
    55    }] [list $hexresult]
    56    do_test substr-$id.2 [subst {
    57      execsql {
    58        SELECT hex(substr(x'$hex', $i1, $i2))
    59      }
    60    }] [list $hexresult]
    61  }
    62  
    63  # Basic SUBSTR functionality
    64  #
    65  substr-test 1.1 abcdefg 1 1 a
    66  substr-test 1.2 abcdefg 2 1 b
    67  substr-test 1.3 abcdefg 1 2 ab
    68  substr-test 1.4 abcdefg 1 100 abcdefg
    69  substr-test 1.5 abcdefg 0 2 a
    70  substr-test 1.6 abcdefg -1 1 g
    71  substr-test 1.7 abcdefg -1 10 g
    72  substr-test 1.8 abcdefg -5 3 cde
    73  substr-test 1.9 abcdefg -7 3 abc
    74  substr-test 1.10 abcdefg -100 98 abcde
    75  substr-test 1.11 abcdefg 5 -1 d
    76  substr-test 1.12 abcdefg 5 -4 abcd
    77  substr-test 1.13 abcdefg 5 -5 abcd
    78  substr-test 1.14 abcdefg -5 -1 b
    79  substr-test 1.15 abcdefg -5 -2 ab
    80  substr-test 1.16 abcdefg -5 -3 ab
    81  substr-test 1.17 abcdefg 100 200 {}
    82  substr-test 1.18 abcdefg 200 100 {}
    83  
    84  # Make sure NULL is returned if any parameter is NULL
    85  #
    86  do_test substr-1.90 {
    87    db eval {SELECT ifnull(substr(NULL,1,1),'nil')}
    88  } nil
    89  do_test substr-1.91 {
    90    db eval {SELECT ifnull(substr(NULL,1),'nil')}
    91  } nil
    92  do_test substr-1.92 {
    93    db eval {SELECT ifnull(substr('abcdefg',NULL,1),'nil')}
    94  } nil
    95  do_test substr-1.93 {
    96    db eval {SELECT ifnull(substr('abcdefg',NULL),'nil')}
    97  } nil
    98  do_test substr-1.94 {
    99    db eval {SELECT ifnull(substr('abcdefg',1,NULL),'nil')}
   100  } nil
   101  
   102  # Make sure everything works with long unicode characters
   103  #
   104  substr-test 2.1 \u1234\u2345\u3456 1 1 \u1234
   105  substr-test 2.2 \u1234\u2345\u3456 2 1 \u2345
   106  substr-test 2.3 \u1234\u2345\u3456 1 2 \u1234\u2345
   107  substr-test 2.4 \u1234\u2345\u3456 -1 1 \u3456
   108  substr-test 2.5 a\u1234b\u2345c\u3456c -5 3 b\u2345c
   109  substr-test 2.6 a\u1234b\u2345c\u3456c -2 -3 b\u2345c
   110  
   111  # Basic functionality for BLOBs
   112  #
   113  subblob-test 3.1 61626364656667 1 1 61
   114  subblob-test 3.2 61626364656667 2 1 62
   115  subblob-test 3.3 61626364656667 1 2 6162
   116  subblob-test 3.4 61626364656667 1 100 61626364656667
   117  subblob-test 3.5 61626364656667 0 2 61
   118  subblob-test 3.6 61626364656667 -1 1 67
   119  subblob-test 3.7 61626364656667 -1 10 67
   120  subblob-test 3.8 61626364656667 -5 3 636465
   121  subblob-test 3.9 61626364656667 -7 3 616263
   122  subblob-test 3.10 61626364656667 -100 98 6162636465
   123  subblob-test 3.11 61626364656667 100 200 {}
   124  subblob-test 3.12 61626364656667 200 100 {}
   125  
   126  # If these blobs were strings, then they would contain multi-byte
   127  # characters.  But since they are blobs, the substr indices refer
   128  # to bytes.
   129  #
   130  subblob-test 4.1 61E188B462E28D8563E3919663 1 1 61
   131  subblob-test 4.2 61E188B462E28D8563E3919663 2 1 E1
   132  subblob-test 4.3 61E188B462E28D8563E3919663 1 2 61E1
   133  subblob-test 4.4 61E188B462E28D8563E3919663 -2 1 96
   134  subblob-test 4.5 61E188B462E28D8563E3919663 -5 4 63E39196
   135  subblob-test 4.6 61E188B462E28D8563E3919663 -100 98 61E188B462E28D8563E391 
   136  
   137  # Two-argument SUBSTR
   138  #
   139  proc substr-2-test {id string idx result} {
   140    db eval {
   141      DELETE FROM t1;
   142      INSERT INTO t1(t) VALUES($string)
   143    }
   144    do_test substr-$id.1 [subst {
   145      execsql {
   146        SELECT substr(t, $idx) FROM t1
   147      }
   148    }] [list $result]
   149    set qstr '[string map {' ''} $string]'
   150    do_test substr-$id.2 [subst {
   151      execsql {
   152        SELECT substr($qstr, $idx)
   153      }
   154    }] [list $result]
   155  }
   156  substr-2-test 5.1 abcdefghijklmnop 5 efghijklmnop
   157  substr-2-test 5.2 abcdef -5 bcdef
   158  
   159  finish_test