factor/extra/trees/splay/splay-tests.factor

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! Copyright (c) 2005 Mackenzie Straight.
! See http://factorcode.org/license.txt for BSD license.
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USING: assocs fry grouping kernel math random sequences sets
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tools.test trees.splay ;
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IN: trees.splay.tests
: randomize-numeric-splay-tree ( splay-tree -- )
100 <iota> [ drop 100 random of drop ] with each ;
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: make-numeric-splay-tree ( n -- splay-tree )
<iota> <splay> [ '[ dup _ set-at ] each ] keep ;
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{ t } [
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100 make-numeric-splay-tree dup randomize-numeric-splay-tree
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[ drop ] { } assoc>map [ < ] monotonic?
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] unit-test
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{ 10 } [ 10 make-numeric-splay-tree keys length ] unit-test
{ 10 } [ 10 make-numeric-splay-tree values length ] unit-test
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{ f } [ <splay> f 4 pick set-at 4 of ] unit-test
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! Ensure that f can be a value
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{ t } [ <splay> f 4 pick set-at 4 swap key? ] unit-test
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{
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{ { 1 "a" } { 2 "b" } { 3 "c" } { 4 "d" } { 5 "e" } { 6 "f" } }
} [
{
{ 4 "d" } { 5 "e" } { 6 "f" }
{ 1 "a" } { 2 "b" } { 3 "c" }
} >splay >alist
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] unit-test
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{ 0 } [
100 <iota> [ dup zip >splay ] keep
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[ over delete-at ] each assoc-size
] unit-test
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: test-tree ( -- tree )
SPLAY{
{ 7 "seven" }
{ 9 "nine" }
{ 4 "four" }
{ 4 "replaced four" }
{ 7 "replaced seven" }
} clone ;
! test assoc-size
{ 3 } [ test-tree assoc-size ] unit-test
{ 2 } [ test-tree 9 over delete-at assoc-size ] unit-test
! Test that converting trees doesn't give linked lists
{
SPLAY{ { 1 1 } { 3 3 } { 2 2 } }
} [ SPLAY{ { 1 1 } { 3 3 } { 2 2 } } >splay ] unit-test