gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/fuzzer2.test (about)

     1  # 2016 February 4
     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  # The focus of the tests is the word-fuzzer virtual table. The tests
    12  # in this file are slower than those in fuzzer1.test. So this file does
    13  # not run as part of veryquick.test etc.
    14  #
    15  
    16  set testdir [file dirname $argv0]
    17  source $testdir/tester.tcl
    18  
    19  ifcapable !vtab {
    20    finish_test
    21    return
    22  }
    23  
    24  set ::testprefix fuzzer2
    25  load_static_extension db fuzzer
    26  
    27  #-------------------------------------------------------------------------
    28  # This test uses a fuzzer table with many rules. There is one rule to
    29  # map each possible two character string, where characters are lower-case
    30  # letters used in the English language, to all other possible two character
    31  # strings. In total, (26^4)-(26^2) mappings (the subtracted term represents
    32  # the no-op mappings discarded automatically by the fuzzer).
    33  #
    34  #
    35  do_execsql_test 1.1.1 {
    36    DROP TABLE IF EXISTS x1;
    37    DROP TABLE IF EXISTS x1_rules;
    38    CREATE TABLE x1_rules(ruleset, cFrom, cTo, cost);
    39  }
    40  puts "This test is slow - perhaps around 7 seconds on an average pc"
    41  do_test 1.1.2 {
    42    set LETTERS {a b c d e f g h i j k l m n o p q r s t u v w x y z}
    43    set cost 1
    44    db transaction {
    45      foreach c1 $LETTERS { 
    46        foreach c2 $LETTERS { 
    47          foreach c3 $LETTERS { 
    48            foreach c4 $LETTERS { 
    49              db eval {INSERT INTO x1_rules VALUES(0, $c1||$c2, $c3||$c4, $cost)}
    50              set cost [expr ($cost%1000) + 1]
    51            }
    52          }
    53        }
    54      }
    55      db eval {UPDATE x1_rules SET cost = 20 WHERE cost<20 AND cFrom!='xx'}
    56    }
    57  } {}
    58  
    59  do_execsql_test 1.2 {
    60    SELECT count(*) FROM x1_rules WHERE cTo!=cFrom;
    61  } [expr 26*26*26*26 - 26*26]
    62  
    63  do_execsql_test 1.2.1 {
    64    CREATE VIRTUAL TABLE x1 USING fuzzer(x1_rules);
    65    SELECT word FROM x1 WHERE word MATCH 'xx' LIMIT 10;
    66  } {xx hw hx hy hz ia ib ic id ie}
    67  do_execsql_test 1.2.2 {
    68    SELECT cTo FROM x1_rules WHERE cFrom='xx' 
    69    ORDER BY cost asc, rowid asc LIMIT 9;
    70  } {hw hx hy hz ia ib ic id ie}
    71  
    72  finish_test