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Additional test cases and requirements marks for the unlikely(),

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likelihood() and instr() functions.

FossilOrigin-Name: 5f01cd36ee8678a07b79f9e01855daffb6bb8c43
This commit is contained in:
drh
2013-10-11 16:35:49 +00:00
parent 4f99189051
commit 3432daa8b2
7 changed files with 150 additions and 14 deletions
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45
test/instr.test
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@ -11,6 +11,11 @@
# This file implements regression tests for SQLite library. The
# focus of this file is testing the built-in INSTR() functions.
#
# EVIDENCE-OF: R-27549-59611 The instr(X,Y) function finds the first
# occurrence of string Y within string X and returns the number of prior
# characters plus 1, or 0 if Y is nowhere found within X.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
@ -199,12 +204,48 @@ do_test instr-1.54 {
do_test instr-1.55 {
db eval {SELECT instr(x'78c3a4e282ac79','y');}
} {4}
do_test instr-1.56 {
# EVIDENCE-OF: R-46421-32541 Or, if X and Y are both BLOBs, then
# instr(X,Y) returns one more than the number bytes prior to the first
# occurrence of Y, or 0 if Y does not occur anywhere within X.
#
do_test instr-1.56.1 {
db eval {SELECT instr(x'78c3a4e282ac79',x'79');}
} {7}
do_test instr-1.57 {
do_test instr-1.56.2 {
db eval {SELECT instr(x'78c3a4e282ac79',x'7a');}
} {0}
do_test instr-1.56.3 {
db eval {SELECT instr(x'78c3a4e282ac79',x'78');}
} {1}
do_test instr-1.56.3 {
db eval {SELECT instr(x'78c3a4e282ac79',x'a4');}
} {3}
# EVIDENCE-OF: R-17329-35644 If both arguments X and Y to instr(X,Y) are
# non-NULL and are not BLOBs then both are interpreted as strings.
#
do_test instr-1.57.1 {
db eval {SELECT instr('xä€y',x'79');}
} {4}
do_test instr-1.57.2 {
db eval {SELECT instr('xä€y',x'a4');}
} {0}
do_test instr-1.57.3 {
db eval {SELECT instr(x'78c3a4e282ac79','y');}
} {4}
# EVIDENCE-OF: R-14708-27487 If either X or Y are NULL in instr(X,Y)
# then the result is NULL.
#
do_execsql_test instr-1.60 {
SELECT coalesce(instr(NULL,'abc'), 999);
} {999}
do_execsql_test instr-1.61 {
SELECT coalesce(instr('abc',NULL), 999);
} {999}
do_execsql_test instr-1.62 {
SELECT coalesce(instr(NULL,NULL), 999);
} {999}
finish_test