76 lines
1.6 KiB
Plaintext
76 lines
1.6 KiB
Plaintext
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# 2012 August 6
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set ::testprefix index5
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do_test 1.1 {
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execsql {
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PRAGMA page_size = 1024;
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CREATE TABLE t1(x);
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BEGIN;
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}
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for {set i 0} {$i < 100000} {incr i} {
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execsql { INSERT INTO t1 VALUES(randstr(100,100)) }
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}
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execsql COMMIT
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execsql {
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CREATE INDEX i1 ON t1(x);
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DROP INDEX I1;
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PRAGMA main.page_size;
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}
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} {1024}
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db close
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testvfs tvfs
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tvfs filter xWrite
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tvfs script write_cb
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proc write_cb {xCall file handle iOfst args} {
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if {[file tail $file]=="test.db"} {
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lappend ::write_list [expr $iOfst/1024]
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}
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}
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do_test 1.2 {
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sqlite3 db test.db -vfs tvfs
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set ::write_list [list]
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execsql { CREATE INDEX i1 ON t1(x) }
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} {}
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do_test 1.3 {
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set nForward 0
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set nBackward 0
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set nNoncont 0
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set iPrev [lindex $::write_list 0]
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for {set i 1} {$i < [llength $::write_list]} {incr i} {
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set iNext [lindex $::write_list $i]
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if {$iNext==($iPrev+1)} {
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incr nForward
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} elseif {$iNext==($iPrev-1)} {
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incr nBackward
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} else {
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incr nNoncont
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}
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set iPrev $iNext
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}
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puts -nonewline \
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" (forward=$nForward, back=$nBackward, noncontiguous=$nNoncont)"
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expr {$nForward > 2*($nBackward + $nNoncont)}
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} {1}
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db close
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tvfs delete
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finish_test
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