xref: /sqlite-3.40.0/test/substr.test (revision cd7274ce) 
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 1.3 2007/10/12 19:11:55 drh Exp $
15
16set testdir [file dirname $argv0]
17source $testdir/tester.tcl
18
19ifcapable !tclvar {
20  finish_test
21  return
22}
23
24# Create a table to work with.
25#
26execsql {
27  CREATE TABLE t1(t text, b blob)
28}
29proc substr-test {id string i1 i2 result} {
30  db eval {
31    DELETE FROM t1;
32    INSERT INTO t1(t) VALUES($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 $result]
45}
46proc subblob-test {id hex i1 i2 hexresult} {
47  db eval "
48    DELETE FROM t1;
49    INSERT INTO t1(b) VALUES(x'$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 $hexresult]
61}
62
63# Basic SUBSTR functionality
64#
65substr-test 1.1 abcdefg 1 1 a
66substr-test 1.2 abcdefg 2 1 b
67substr-test 1.3 abcdefg 1 2 ab
68substr-test 1.4 abcdefg 1 100 abcdefg
69substr-test 1.5 abcdefg 0 1 a
70substr-test 1.6 abcdefg -1 1 g
71substr-test 1.7 abcdefg -1 10 g
72substr-test 1.8 abcdefg -5 3 cde
73substr-test 1.9 abcdefg -7 3 abc
74substr-test 1.10 abcdefg -100 98 abcde
75
76# Make sure everything works with long unicode characters
77#
78substr-test 2.1 \u1234\u2345\u3456 1 1 \u1234
79substr-test 2.2 \u1234\u2345\u3456 2 1 \u2345
80substr-test 2.3 \u1234\u2345\u3456 1 2 \u1234\u2345
81substr-test 2.4 \u1234\u2345\u3456 -1 1 \u3456
82substr-test 2.5 a\u1234b\u2345c\u3456c -5 3 b\u2345c
83
84# Basic functionality for BLOBs
85#
86subblob-test 3.1 61626364656667 1 1 61
87subblob-test 3.2 61626364656667 2 1 62
88subblob-test 3.3 61626364656667 1 2 6162
89subblob-test 3.4 61626364656667 1 100 61626364656667
90subblob-test 3.5 61626364656667 0 1 61
91subblob-test 3.6 61626364656667 -1 1 67
92subblob-test 3.7 61626364656667 -1 10 67
93subblob-test 3.8 61626364656667 -5 3 636465
94subblob-test 3.9 61626364656667 -7 3 616263
95subblob-test 3.10 61626364656667 -100 98 6162636465
96
97# If these blobs were strings, then they would contain multi-byte
98# characters.  But since they are blobs, the substr indices refer
99# to bytes.
100#
101subblob-test 4.1 61E188B462E28D8563E3919663 1 1 61
102subblob-test 4.2 61E188B462E28D8563E3919663 2 1 E1
103subblob-test 4.3 61E188B462E28D8563E3919663 1 2 61E1
104subblob-test 4.4 61E188B462E28D8563E3919663 -2 1 96
105subblob-test 4.5 61E188B462E28D8563E3919663 -5 4 63E39196
106subblob-test 4.6 61E188B462E28D8563E3919663 -100 98 61E188B462E28D8563E391
107
108# Two-argument SUBSTR
109#
110proc substr-2-test {id string idx result} {
111  db eval {
112    DELETE FROM t1;
113    INSERT INTO t1(t) VALUES($string)
114  }
115  do_test substr-$id.1 [subst {
116    execsql {
117      SELECT substr(t, $idx) FROM t1
118    }
119  }] [list $result]
120  set qstr '[string map {' ''} $string]'
121  do_test substr-$id.2 [subst {
122    execsql {
123      SELECT substr($qstr, $idx)
124    }
125  }] [list $result]
126}
127substr-2-test 5.1 abcdefghijklmnop 5 efghijklmnop
128substr-2-test 5.2 abcdef -5 bcdef
129
130finish_test
131