[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/test/fts3expr2.test

-# 2009 January 1
-#
-# 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.
-#
-#*************************************************************************
-# This file implements regression tests for SQLite library.  The
-# focus of this script is testing the FTS3 module syntax parser.
-#
-# $Id: fts3expr2.test,v 1.2 2009/06/05 17:09:12 drh Exp $
-#
-
-set testdir [file dirname $argv0]
-source $testdir/tester.tcl
-
-# If SQLITE_ENABLE_FTS3 is defined, omit this file.
-ifcapable !fts3 {
-  finish_test
-  return
-}
-
-# Test overview:
-# 
-#   The tests in this file are pseudo-randomly generated. They test
-#   the fts3 match expression parser via the test interface
-#   SQL function "fts3_exprtest" (see comments in fts3_expr.c).
-#
-#   Each test case works as follows:
-#   
-#     1. A random expression tree is generated using proc [random_expr_tree].
-#     2. The expression tree is converted to the text of an equivalent
-#        fts3 expression using proc [tree_to_expr].
-#     3. The test SQL function "fts3_exprtest" is used to parse the 
-#        expression text generated in step (2), returning a parsed expression
-#        tree.
-#     4. Test that the tree returned in step (3) matches that generated in 
-#        step (1).
-#
-#   In step (2), 4 different fts3 expressions are created from each 
-#   expression tree by varying the following boolean properties:
-#
-#     * Whether or not superflous parenthesis are included. i.e. if
-#       "a OR b AND (c OR d)" or "a OR (b AND (c OR d))" is generated.
-#
-#     * Whether or not explict AND operators are used. i.e. if
-#     "a OR b AND c" or "a OR b c" is generated.
-#
-
-set sqlite_fts3_enable_parentheses 1
-
-proc strip_phrase_data {L} {
-  if {[lindex $L 0] eq "PHRASE"} {
-    return [list P [lrange $L 3 end]]
-  }
-  return [list \
-    [lindex $L 0] \
-    [strip_phrase_data [lindex $L 1]] \
-    [strip_phrase_data [lindex $L 2]] \
-  ]
-}
-proc test_fts3expr2 {expr} {
-  strip_phrase_data [
-    db one {SELECT fts3_exprtest('simple', $expr, 'a', 'b', 'c')}
-  ]
-}
-
-proc rnd {nMax} { expr {int(rand()*$nMax)} }
-
-proc random_phrase {} {
-  set phrases [list one two three four "one two" "three four"]
-  list P [lindex $phrases [rnd [llength $phrases]]]
-}
-
-# Generate and return a pseudo-random expression tree. Using the same 
-# format returned by the [test_fts3expr2] proc.
-#
-proc random_expr_tree {iHeight} {
-  if {$iHeight==0 || [rnd 3]==0} {
-    return [random_phrase]
-  }
-
-  set operators [list NEAR NOT AND OR]
-  set op [lindex $operators [rnd 4]]
-
-  if {$op eq "NEAR"} {
-    set iDistance [rnd 15]
-    return [list $op/$iDistance [random_phrase] [random_phrase]]
-  }
-
-  set iNH [expr {$iHeight - 1}]
-  return [list $op [random_expr_tree $iNH] [random_expr_tree $iNH]]
-}
-
-# Given an expression tree, generate a corresponding expression.
-#
-proc tree_to_expr {tree all_brackets implicit_and} {
-  set prec(NOT) 2
-  set prec(AND) 3
-  set prec()    3
-  set prec(OR)  4
-
-  set op [lindex $tree 0]
-
-  if {$op eq "P"} {
-    set phrase [lindex $tree 1]
-    if {[llength $phrase]>1} {
-      return "\"$phrase\""
-    } else {
-      return $phrase
-    }
-  }
-
-  if {$op eq "NEAR/10"} {
-    set op "NEAR"
-  }
-  if {$op eq "AND" && $implicit_and} {
-    set op ""
-  }
-
-  set lhs [lindex $tree 1]
-  set rhs [lindex $tree 2]
-  set zLeft  [tree_to_expr $lhs $all_brackets $implicit_and]
-  set zRight [tree_to_expr $rhs $all_brackets $implicit_and]
-
-  set iPrec 5
-  set iLeftPrec 0
-  set iRightPrec 0
-
-  catch {set iPrec      $prec($op)}
-  catch {set iLeftPrec  $prec([lindex $lhs 0])}
-  catch {set iRightPrec $prec([lindex $rhs 0])}
-
-  if {$iLeftPrec > $iPrec || $all_brackets} {
-    set zLeft "($zLeft)"
-  } 
-  if {$iRightPrec >= $iPrec || $all_brackets} {
-    set zRight "($zRight)"
-  } 
-
-  return "$zLeft $op $zRight"
-}
-
-proc do_exprparse_test {name expr tree} {
-  uplevel do_test $name [list "test_fts3expr2 {$expr}"] [list $tree]
-}
-
-for {set iTest 1} {$iTest<500} {incr iTest} {
-  set t [random_expr_tree 4]
-
-  set e1 [tree_to_expr $t 0 0]
-  set e2 [tree_to_expr $t 0 1]
-  set e3 [tree_to_expr $t 1 0]
-  set e4 [tree_to_expr $t 1 1]
-
-  do_exprparse_test fts3expr2-$iTest.1 $e1 $t
-  do_exprparse_test fts3expr2-$iTest.2 $e2 $t
-  do_exprparse_test fts3expr2-$iTest.3 $e3 $t
-  do_exprparse_test fts3expr2-$iTest.4 $e4 $t
-}
-
-set sqlite_fts3_enable_parentheses 0
-finish_test