xref: /sqlite-3.40.0/test/substr.test (revision 1335ec7d) 
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
15set testdir [file dirname $argv0]
16source $testdir/tester.tcl
17
18ifcapable !tclvar {
19  finish_test
20  return
21}
22
23# Create a table to work with.
24#
25execsql {
26  CREATE TABLE t1(t text, b blob)
27}
28proc substr-test {id string i1 i2 result} {
29  db eval {
30    DELETE FROM t1;
31    INSERT INTO t1(t) VALUES($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 $result]
44}
45proc subblob-test {id hex i1 i2 hexresult} {
46  db eval "
47    DELETE FROM t1;
48    INSERT INTO t1(b) VALUES(x'$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#
64substr-test 1.1 abcdefg 1 1 a
65substr-test 1.2 abcdefg 2 1 b
66substr-test 1.3 abcdefg 1 2 ab
67substr-test 1.4 abcdefg 1 100 abcdefg
68substr-test 1.5 abcdefg 0 2 a
69substr-test 1.6 abcdefg -1 1 g
70substr-test 1.7 abcdefg -1 10 g
71substr-test 1.8 abcdefg -5 3 cde
72substr-test 1.9 abcdefg -7 3 abc
73substr-test 1.10 abcdefg -100 98 abcde
74substr-test 1.11 abcdefg 5 -1 d
75substr-test 1.12 abcdefg 5 -4 abcd
76substr-test 1.13 abcdefg 5 -5 abcd
77substr-test 1.14 abcdefg -5 -1 b
78substr-test 1.15 abcdefg -5 -2 ab
79substr-test 1.16 abcdefg -5 -3 ab
80substr-test 1.17 abcdefg 100 200 {}
81substr-test 1.18 abcdefg 200 100 {}
82
83# Make sure NULL is returned if any parameter is NULL
84#
85do_test substr-1.90 {
86  db eval {SELECT ifnull(substr(NULL,1,1),'nil')}
87} nil
88do_test substr-1.91 {
89  db eval {SELECT ifnull(substr(NULL,1),'nil')}
90} nil
91do_test substr-1.92 {
92  db eval {SELECT ifnull(substr('abcdefg',NULL,1),'nil')}
93} nil
94do_test substr-1.93 {
95  db eval {SELECT ifnull(substring('abcdefg',NULL),'nil')}
96} nil
97do_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#
103substr-test 2.1 \u1234\u2345\u3456 1 1 \u1234
104substr-test 2.2 \u1234\u2345\u3456 2 1 \u2345
105substr-test 2.3 \u1234\u2345\u3456 1 2 \u1234\u2345
106substr-test 2.4 \u1234\u2345\u3456 -1 1 \u3456
107substr-test 2.5 a\u1234b\u2345c\u3456c -5 3 b\u2345c
108substr-test 2.6 a\u1234b\u2345c\u3456c -2 -3 b\u2345c
109
110# Basic functionality for BLOBs
111#
112subblob-test 3.1 61626364656667 1 1 61
113subblob-test 3.2 61626364656667 2 1 62
114subblob-test 3.3 61626364656667 1 2 6162
115subblob-test 3.4 61626364656667 1 100 61626364656667
116subblob-test 3.5 61626364656667 0 2 61
117subblob-test 3.6 61626364656667 -1 1 67
118subblob-test 3.7 61626364656667 -1 10 67
119subblob-test 3.8 61626364656667 -5 3 636465
120subblob-test 3.9 61626364656667 -7 3 616263
121subblob-test 3.10 61626364656667 -100 98 6162636465
122subblob-test 3.11 61626364656667 100 200 {}
123subblob-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#
129subblob-test 4.1 61E188B462E28D8563E3919663 1 1 61
130subblob-test 4.2 61E188B462E28D8563E3919663 2 1 E1
131subblob-test 4.3 61E188B462E28D8563E3919663 1 2 61E1
132subblob-test 4.4 61E188B462E28D8563E3919663 -2 1 96
133subblob-test 4.5 61E188B462E28D8563E3919663 -5 4 63E39196
134subblob-test 4.6 61E188B462E28D8563E3919663 -100 98 61E188B462E28D8563E391
135
136# Two-argument SUBSTR
137#
138proc 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}
155substr-2-test 5.1 abcdefghijklmnop 5 efghijklmnop
156substr-2-test 5.2 abcdef -5 bcdef
157
158finish_test
159