- # See the file LICENSE for redistribution information.
- #
- # Copyright (c) 2000
- # Sleepycat Software. All rights reserved.
- #
- # $Id: test083.tcl,v 11.6 2000/12/11 17:24:55 sue Exp $
- #
- # Test 83.
- # Test of DB->key_range
- proc test083 { method {pgsz 512} {maxitems 5000} {step 2} args} {
- source ./include.tcl
- set omethod [convert_method $method]
- set args [convert_args $method $args]
- puts "Test083 $method ($args): Test of DB->key_range"
- if { [is_btree $method] != 1 } {
- puts "tTest083: Skipping for method $method."
- return
- }
- set pgindex [lsearch -exact $args "-pagesize"]
- if { $pgindex != -1 } {
- puts "Test083: skipping for specific pagesizes"
- return
- }
- # If we are using an env, then testfile should just be the db name.
- # Otherwise it is the test directory and the name.
- set eindex [lsearch -exact $args "-env"]
- if { $eindex == -1 } {
- set testfile $testdir/test083.db
- set env NULL
- } else {
- set testfile test083.db
- incr eindex
- set env [lindex $args $eindex]
- }
- # We assume that numbers will be at most six digits wide
- error_check_bad maxitems_range [expr $maxitems > 999999] 1
- # We want to test key_range on a variety of sizes of btree.
- # Start at ten keys and work up to $maxitems keys, at each step
- # multiplying the number of keys by $step.
- for { set nitems 10 } { $nitems <= $maxitems }
- { set nitems [expr $nitems * $step] } {
- puts "tTest083.a: Opening new database"
- cleanup $testdir $env
- set db [eval {berkdb_open -create -truncate -mode 0644}
- -pagesize $pgsz $omethod $args $testfile]
- error_check_good dbopen [is_valid_db $db] TRUE
- t83_build $db $nitems
- t83_test $db $nitems
- error_check_good db_close [$db close] 0
- }
- }
- proc t83_build { db nitems } {
- source ./include.tcl
- puts "tTest083.b: Populating database with $nitems keys"
- set keylist {}
- puts "ttTest083.b.1: Generating key list"
- for { set i 0 } { $i < $nitems } { incr i } {
- lappend keylist $i
- }
- # With randomly ordered insertions, the range of errors we
- # get from key_range can be unpredictably high [#2134]. For now,
- # just skip the randomization step.
- #puts "ttTest083.b.2: Randomizing key list"
- #set keylist [randomize_list $keylist]
- #puts "ttTest083.b.3: Populating database with randomized keys"
- puts "ttTest083.b.2: Populating database"
- set data [repeat . 50]
- foreach keynum $keylist {
- error_check_good db_put [$db put key[format %6d $keynum]
- $data] 0
- }
- }
- proc t83_test { db nitems } {
- # Look at the first key, then at keys about 1/4, 1/2, 3/4, and
- # all the way through the database. Make sure the key_ranges
- # aren't off by more than 10%.
- set dbc [$db cursor]
- error_check_good dbc [is_valid_cursor $dbc $db] TRUE
- puts "tTest083.c: Verifying ranges..."
- for { set i 0 } { $i < $nitems }
- { incr i [expr $nitems / [berkdb random_int 3 16]] } {
- puts "tt...key $i"
- error_check_bad key0 [llength [set dbt [$dbc get -first]]] 0
- for { set j 0 } { $j < $i } { incr j } {
- error_check_bad key$j
- [llength [set dbt [$dbc get -next]]] 0
- }
- set ranges [$db keyrange [lindex [lindex $dbt 0] 0]]
- #puts $ranges
- error_check_good howmanyranges [llength $ranges] 3
- set lessthan [lindex $ranges 0]
- set morethan [lindex $ranges 2]
- set rangesum [expr $lessthan + [lindex $ranges 1] + $morethan]
- roughly_equal $rangesum 1 0.05
- # Wild guess.
- if { $nitems < 500 } {
- set tol 0.3
- } elseif { $nitems > 500 } {
- set tol 0.15
- }
- roughly_equal $lessthan [expr $i * 1.0 / $nitems] $tol
- }
- error_check_good dbc_close [$dbc close] 0
- }
- proc roughly_equal { a b tol } {
- error_check_good "$a =~ $b" [expr $a - $b < $tol] 1
- }