sl@0: # 2007 May 14
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: # This file implements regression tests for SQLite library.  The
sl@0: # focus of this file is testing the built-in SUBSTR() functions.
sl@0: #
sl@0: # $Id: substr.test,v 1.3 2007/10/12 19:11:55 drh Exp $
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: ifcapable !tclvar {
sl@0:   finish_test
sl@0:   return
sl@0: }
sl@0: 
sl@0: # Create a table to work with.
sl@0: #
sl@0: execsql { 
sl@0:   CREATE TABLE t1(t text, b blob)
sl@0: }
sl@0: proc substr-test {id string i1 i2 result} {
sl@0:   db eval {
sl@0:     DELETE FROM t1;
sl@0:     INSERT INTO t1(t) VALUES($string)
sl@0:   }
sl@0:   do_test substr-$id.1 [subst {
sl@0:     execsql {
sl@0:       SELECT substr(t, $i1, $i2) FROM t1
sl@0:     }
sl@0:   }] [list $result]
sl@0:   set qstr '[string map {' ''} $string]'
sl@0:   do_test substr-$id.2 [subst {
sl@0:     execsql {
sl@0:       SELECT substr($qstr, $i1, $i2)
sl@0:     }
sl@0:   }] [list $result]
sl@0: }
sl@0: proc subblob-test {id hex i1 i2 hexresult} {
sl@0:   db eval "
sl@0:     DELETE FROM t1;
sl@0:     INSERT INTO t1(b) VALUES(x'$hex')
sl@0:   "
sl@0:   do_test substr-$id.1 [subst {
sl@0:     execsql {
sl@0:       SELECT hex(substr(b, $i1, $i2)) FROM t1
sl@0:     }
sl@0:   }] [list $hexresult]
sl@0:   do_test substr-$id.2 [subst {
sl@0:     execsql {
sl@0:       SELECT hex(substr(x'$hex', $i1, $i2))
sl@0:     }
sl@0:   }] [list $hexresult]
sl@0: }
sl@0: 
sl@0: # Basic SUBSTR functionality
sl@0: #
sl@0: substr-test 1.1 abcdefg 1 1 a
sl@0: substr-test 1.2 abcdefg 2 1 b
sl@0: substr-test 1.3 abcdefg 1 2 ab
sl@0: substr-test 1.4 abcdefg 1 100 abcdefg
sl@0: substr-test 1.5 abcdefg 0 1 a
sl@0: substr-test 1.6 abcdefg -1 1 g
sl@0: substr-test 1.7 abcdefg -1 10 g
sl@0: substr-test 1.8 abcdefg -5 3 cde
sl@0: substr-test 1.9 abcdefg -7 3 abc
sl@0: substr-test 1.10 abcdefg -100 98 abcde
sl@0: 
sl@0: # Make sure everything works with long unicode characters
sl@0: #
sl@0: substr-test 2.1 \u1234\u2345\u3456 1 1 \u1234
sl@0: substr-test 2.2 \u1234\u2345\u3456 2 1 \u2345
sl@0: substr-test 2.3 \u1234\u2345\u3456 1 2 \u1234\u2345
sl@0: substr-test 2.4 \u1234\u2345\u3456 -1 1 \u3456
sl@0: substr-test 2.5 a\u1234b\u2345c\u3456c -5 3 b\u2345c
sl@0: 
sl@0: # Basic functionality for BLOBs
sl@0: #
sl@0: subblob-test 3.1 61626364656667 1 1 61
sl@0: subblob-test 3.2 61626364656667 2 1 62
sl@0: subblob-test 3.3 61626364656667 1 2 6162
sl@0: subblob-test 3.4 61626364656667 1 100 61626364656667
sl@0: subblob-test 3.5 61626364656667 0 1 61
sl@0: subblob-test 3.6 61626364656667 -1 1 67
sl@0: subblob-test 3.7 61626364656667 -1 10 67
sl@0: subblob-test 3.8 61626364656667 -5 3 636465
sl@0: subblob-test 3.9 61626364656667 -7 3 616263
sl@0: subblob-test 3.10 61626364656667 -100 98 6162636465
sl@0: 
sl@0: # If these blobs were strings, then they would contain multi-byte
sl@0: # characters.  But since they are blobs, the substr indices refer
sl@0: # to bytes.
sl@0: #
sl@0: subblob-test 4.1 61E188B462E28D8563E3919663 1 1 61
sl@0: subblob-test 4.2 61E188B462E28D8563E3919663 2 1 E1
sl@0: subblob-test 4.3 61E188B462E28D8563E3919663 1 2 61E1
sl@0: subblob-test 4.4 61E188B462E28D8563E3919663 -2 1 96
sl@0: subblob-test 4.5 61E188B462E28D8563E3919663 -5 4 63E39196
sl@0: subblob-test 4.6 61E188B462E28D8563E3919663 -100 98 61E188B462E28D8563E391 
sl@0: 
sl@0: # Two-argument SUBSTR
sl@0: #
sl@0: proc substr-2-test {id string idx result} {
sl@0:   db eval {
sl@0:     DELETE FROM t1;
sl@0:     INSERT INTO t1(t) VALUES($string)
sl@0:   }
sl@0:   do_test substr-$id.1 [subst {
sl@0:     execsql {
sl@0:       SELECT substr(t, $idx) FROM t1
sl@0:     }
sl@0:   }] [list $result]
sl@0:   set qstr '[string map {' ''} $string]'
sl@0:   do_test substr-$id.2 [subst {
sl@0:     execsql {
sl@0:       SELECT substr($qstr, $idx)
sl@0:     }
sl@0:   }] [list $result]
sl@0: }
sl@0: substr-2-test 5.1 abcdefghijklmnop 5 efghijklmnop
sl@0: substr-2-test 5.2 abcdef -5 bcdef
sl@0: 
sl@0: finish_test