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      1 # 2011 January 27
      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 script is testing the FTS3 module.
     13 #
     14 
     15 set testdir [file dirname $argv0]
     16 source $testdir/tester.tcl
     17 ifcapable !fts3 { finish_test ; return }
     18 set ::testprefix fts3comp1
     19 
     20 # Create a pretend compression system. 
     21 #
     22 # Each time the [zip] function is called, an entry is added to the ::strings
     23 # array mapping from an integer key to the string argument to zip. The key
     24 # is returned. Later on, when the key is passed to [unzip], the original
     25 # string is retrieved from the ::strings array and returned.
     26 #
     27 set next_x 0
     28 proc zip {x} {
     29  incr ::next_x
     30  set ::strings($::next_x) $x
     31  return $::next_x
     32 }
     33 proc unzip {x} {
     34   return $::strings($x)
     35 }
     36 
     37 foreach {tn zip unzip} {
     38   1   zip   unzip
     39   2   {z.i.p!!}    {un "zip"}
     40 } {
     41 
     42   set next_x 0
     43   catch {db close}
     44   forcedelete test.db
     45   sqlite3 db test.db
     46   db func $zip zip
     47   db func $unzip unzip
     48   
     49   # Create a table that uses zip/unzip. Check that content inserted into
     50   # the table can be read back (using a full-scan query). Check that the
     51   # underlying %_content table contains the compressed (integer) values.
     52   #
     53   do_execsql_test 1.$tn.0 "
     54     CREATE VIRTUAL TABLE t1 USING fts4(
     55       a, b, 
     56       compress='$zip', uncompress='$unzip'
     57     );
     58   "
     59   do_execsql_test 1.$tn.1 {
     60     INSERT INTO t1 VALUES('one two three', 'two four six');
     61     SELECT a, b FROM t1;
     62   } {{one two three} {two four six}}
     63   do_execsql_test 1.$tn.2 {
     64     SELECT c0a, c1b FROM t1_content;
     65   } {1 2}
     66   
     67   # Insert another row and check that it can be read back. Also that the
     68   # %_content table still contains all compressed content. This time, try
     69   # full-text index and by-docid queries too.
     70   #
     71   do_execsql_test 1.$tn.3 {
     72     INSERT INTO t1 VALUES('three six nine', 'four eight twelve');
     73     SELECT a, b FROM t1;
     74   } {{one two three} {two four six} {three six nine} {four eight twelve}}
     75   do_execsql_test 1.$tn.4 {
     76     SELECT c0a, c1b FROM t1_content;
     77   } {1 2 3 4}
     78   
     79   do_execsql_test 1.$tn.5 {
     80     SELECT a, b FROM t1 WHERE docid = 2
     81   } {{three six nine} {four eight twelve}}
     82   do_execsql_test 1.$tn.6 {
     83     SELECT a, b FROM t1 WHERE t1 MATCH 'two'
     84   } {{one two three} {two four six}}
     85   
     86   # Delete a row and check that the full-text index is correctly updated.
     87   # Inspect the full-text index using an fts4aux table.
     88   #
     89   do_execsql_test 1.$tn.7 {
     90     CREATE VIRTUAL TABLE terms USING fts4aux(t1);
     91     SELECT term, documents, occurrences FROM terms WHERE col = '*';
     92   } {
     93     eight 1 1    four 2 2    nine 1 1    one 1 1 
     94     six 2 2      three 2 2   twelve 1 1  two 1 2
     95   }
     96   do_execsql_test 1.$tn.8 {
     97     DELETE FROM t1 WHERE docid = 1;
     98     SELECT term, documents, occurrences FROM terms WHERE col = '*';
     99   } {
    100     eight 1 1   four 1 1    nine 1 1 
    101     six 1 1     three 1 1   twelve 1 1
    102   }
    103   do_execsql_test 1.$tn.9 { SELECT c0a, c1b FROM t1_content } {3 4}
    104 }
    105 
    106 # Test that is an error to specify just one of compress and uncompress.
    107 #
    108 do_catchsql_test 2.1 {
    109   CREATE VIRTUAL TABLE t2 USING fts4(x, compress=zip)
    110 } {1 {missing uncompress parameter in fts4 constructor}}
    111 do_catchsql_test 2.2 {
    112   CREATE VIRTUAL TABLE t2 USING fts4(x, uncompress=unzip)
    113 } {1 {missing compress parameter in fts4 constructor}}
    114 
    115 finish_test
    116