[sql] Import reference version of SQLite 3.10.2.

third_party/sqlite/sqlite-src-3100200/ext/fts5/test/fts5near.test

+# 2014 Jan 08
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# Tests focused on the NEAR operator.
+#
+
+source [file join [file dirname [info script]] fts5_common.tcl]
+set testprefix fts5near
+
+# If SQLITE_ENABLE_FTS5 is defined, omit this file.
+ifcapable !fts5 {
+  finish_test
+  return
+}
+
+proc do_near_test {tn doc near res} {
+  uplevel [list do_execsql_test $tn "
+    DELETE FROM t1;
+    INSERT INTO t1 VALUES('$doc');
+    SELECT count(*) FROM t1 WHERE t1 MATCH '$near';
+  " $res]
+}
+
+execsql { 
+  CREATE VIRTUAL TABLE t1 USING fts5(x, tokenize = "ascii tokenchars '.'") 
+}
+
+do_near_test 1.1 ". . a . . . b . ." { NEAR(a b, 5) } 1
+do_near_test 1.2 ". . a . . . b . ." { NEAR(a b, 4) } 1
+do_near_test 1.3 ". . a . . . b . ." { NEAR(a b, 3) } 1
+do_near_test 1.4 ". . a . . . b . ." { NEAR(a b, 2) } 0
+
+do_near_test 1.5 ". . a . . . b . ." { NEAR(b a, 5) } 1
+do_near_test 1.6 ". . a . . . b . ." { NEAR(b a, 4) } 1
+do_near_test 1.7 ". . a . . . b . ." { NEAR(b a, 3) } 1
+do_near_test 1.8 ". . a . . . b . ." { NEAR(b a, 2) } 0
+
+do_near_test 1.9  ". a b . . . c . ." { NEAR("a b" c, 3) } 1
+do_near_test 1.10 ". a b . . . c . ." { NEAR("a b" c, 2) } 0
+do_near_test 1.11 ". a b . . . c . ." { NEAR(c "a b", 3) } 1
+do_near_test 1.12 ". a b . . . c . ." { NEAR(c "a b", 2) } 0
+
+do_near_test 1.13 ". a b . . . c d ." { NEAR(a+b c+d, 3) } 1
+do_near_test 1.14 ". a b . . . c d ." { NEAR(a+b c+d, 2) } 0
+do_near_test 1.15 ". a b . . . c d ." { NEAR(c+d a+b, 3) } 1
+do_near_test 1.16 ". a b . . . c d ." { NEAR(c+d a+b, 2) } 0
+
+do_near_test 1.17 ". a b . . . c d ." { NEAR(a b c d, 5) } 1
+do_near_test 1.18 ". a b . . . c d ." { NEAR(a b c d, 4) } 0
+do_near_test 1.19 ". a b . . . c d ." { NEAR(a+b c d, 4) } 1
+
+do_near_test 1.20 "a b c d e f g h i" { NEAR(b+c a+b+c+d i, 5) } 1
+do_near_test 1.21 "a b c d e f g h i" { NEAR(b+c a+b+c+d i, 4) } 0
+
+do_near_test 1.22 "a b c d e f g h i" { NEAR(a+b+c+d i b+c, 5) } 1
+do_near_test 1.23 "a b c d e f g h i" { NEAR(a+b+c+d i b+c, 4) } 0
+
+do_near_test 1.24 "a b c d e f g h i" { NEAR(i a+b+c+d b+c, 5) } 1
+do_near_test 1.25 "a b c d e f g h i" { NEAR(i a+b+c+d b+c, 4) } 0
+
+
+finish_test
+