gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/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  
    15  set testdir [file dirname $argv0]
    16  source $testdir/tester.tcl
    17  
    18  ifcapable !tclvar {
    19    finish_test
    20    return
    21  }
    22  
    23  # Create a table to work with.
    24  #
    25  execsql { 
    26    CREATE TABLE t1(t text, b blob)
    27  }
    28  proc substr-test {id string i1 i2 result} {
    29    db eval {
    30      DELETE FROM t1;
    31      INSERT INTO t1(t) VALUES($string)
    32    }
    33    do_test substr-$id.1 [subst {
    34      execsql {
    35        SELECT substr(t, $i1, $i2) FROM t1
    36      }
    37    }] [list $result]
    38    set qstr '[string map {' ''} $string]'
    39    do_test substr-$id.2 [subst {
    40      execsql {
    41        SELECT substring($qstr, $i1, $i2)
    42      }
    43    }] [list $result]
    44  }
    45  proc subblob-test {id hex i1 i2 hexresult} {
    46    db eval "
    47      DELETE FROM t1;
    48      INSERT INTO t1(b) VALUES(x'$hex')
    49    "
    50    do_test substr-$id.1 [subst {
    51      execsql {
    52        SELECT hex(substr(b, $i1, $i2)) FROM t1
    53      }
    54    }] [list $hexresult]
    55    do_test substr-$id.2 [subst {
    56      execsql {
    57        SELECT hex(substring(x'$hex', $i1, $i2))
    58      }
    59    }] [list $hexresult]
    60  }
    61  
    62  # Basic SUBSTR functionality
    63  #
    64  substr-test 1.1 abcdefg 1 1 a
    65  substr-test 1.2 abcdefg 2 1 b
    66  substr-test 1.3 abcdefg 1 2 ab
    67  substr-test 1.4 abcdefg 1 100 abcdefg
    68  substr-test 1.5 abcdefg 0 2 a
    69  substr-test 1.6 abcdefg -1 1 g
    70  substr-test 1.7 abcdefg -1 10 g
    71  substr-test 1.8 abcdefg -5 3 cde
    72  substr-test 1.9 abcdefg -7 3 abc
    73  substr-test 1.10 abcdefg -100 98 abcde
    74  substr-test 1.11 abcdefg 5 -1 d
    75  substr-test 1.12 abcdefg 5 -4 abcd
    76  substr-test 1.13 abcdefg 5 -5 abcd
    77  substr-test 1.14 abcdefg -5 -1 b
    78  substr-test 1.15 abcdefg -5 -2 ab
    79  substr-test 1.16 abcdefg -5 -3 ab
    80  substr-test 1.17 abcdefg 100 200 {}
    81  substr-test 1.18 abcdefg 200 100 {}
    82  
    83  # Make sure NULL is returned if any parameter is NULL
    84  #
    85  do_test substr-1.90 {
    86    db eval {SELECT ifnull(substr(NULL,1,1),'nil')}
    87  } nil
    88  do_test substr-1.91 {
    89    db eval {SELECT ifnull(substr(NULL,1),'nil')}
    90  } nil
    91  do_test substr-1.92 {
    92    db eval {SELECT ifnull(substr('abcdefg',NULL,1),'nil')}
    93  } nil
    94  do_test substr-1.93 {
    95    db eval {SELECT ifnull(substring('abcdefg',NULL),'nil')}
    96  } nil
    97  do_test substr-1.94 {
    98    db eval {SELECT ifnull(substr('abcdefg',1,NULL),'nil')}
    99  } nil
   100  
   101  # Make sure everything works with long unicode characters
   102  #
   103  substr-test 2.1 \u1234\u2345\u3456 1 1 \u1234
   104  substr-test 2.2 \u1234\u2345\u3456 2 1 \u2345
   105  substr-test 2.3 \u1234\u2345\u3456 1 2 \u1234\u2345
   106  substr-test 2.4 \u1234\u2345\u3456 -1 1 \u3456
   107  substr-test 2.5 a\u1234b\u2345c\u3456c -5 3 b\u2345c
   108  substr-test 2.6 a\u1234b\u2345c\u3456c -2 -3 b\u2345c
   109  
   110  # Basic functionality for BLOBs
   111  #
   112  subblob-test 3.1 61626364656667 1 1 61
   113  subblob-test 3.2 61626364656667 2 1 62
   114  subblob-test 3.3 61626364656667 1 2 6162
   115  subblob-test 3.4 61626364656667 1 100 61626364656667
   116  subblob-test 3.5 61626364656667 0 2 61
   117  subblob-test 3.6 61626364656667 -1 1 67
   118  subblob-test 3.7 61626364656667 -1 10 67
   119  subblob-test 3.8 61626364656667 -5 3 636465
   120  subblob-test 3.9 61626364656667 -7 3 616263
   121  subblob-test 3.10 61626364656667 -100 98 6162636465
   122  subblob-test 3.11 61626364656667 100 200 {}
   123  subblob-test 3.12 61626364656667 200 100 {}
   124  
   125  # If these blobs were strings, then they would contain multi-byte
   126  # characters.  But since they are blobs, the substr indices refer
   127  # to bytes.
   128  #
   129  subblob-test 4.1 61E188B462E28D8563E3919663 1 1 61
   130  subblob-test 4.2 61E188B462E28D8563E3919663 2 1 E1
   131  subblob-test 4.3 61E188B462E28D8563E3919663 1 2 61E1
   132  subblob-test 4.4 61E188B462E28D8563E3919663 -2 1 96
   133  subblob-test 4.5 61E188B462E28D8563E3919663 -5 4 63E39196
   134  subblob-test 4.6 61E188B462E28D8563E3919663 -100 98 61E188B462E28D8563E391 
   135  
   136  # Two-argument SUBSTR
   137  #
   138  proc substr-2-test {id string idx result} {
   139    db eval {
   140      DELETE FROM t1;
   141      INSERT INTO t1(t) VALUES($string)
   142    }
   143    do_test substr-$id.1 [subst {
   144      execsql {
   145        SELECT substr(t, $idx) FROM t1
   146      }
   147    }] [list $result]
   148    set qstr '[string map {' ''} $string]'
   149    do_test substr-$id.2 [subst {
   150      execsql {
   151        SELECT substring($qstr, $idx)
   152      }
   153    }] [list $result]
   154  }
   155  substr-2-test 5.1 abcdefghijklmnop 5 efghijklmnop
   156  substr-2-test 5.2 abcdef -5 bcdef
   157  
   158  finish_test