! Copyright 2007, 2008 Ryan Murphy, Slava Pestov
-! See http://factorcode.org/license.txt for BSD license.
+! See https://factorcode.org/license.txt for BSD license.
USING: arrays kernel math namespaces tools.test
heaps heaps.private math.parser random assocs sequences sorting
accessors math.order locals ;
[ <min-heap> heap-pop ] must-fail
[ <max-heap> heap-pop ] must-fail
-[ t ] [ <min-heap> heap-empty? ] unit-test
-[ f ] [ <min-heap> 1 t pick heap-push heap-empty? ] unit-test
-[ t ] [ <max-heap> heap-empty? ] unit-test
-[ f ] [ <max-heap> 1 t pick heap-push heap-empty? ] unit-test
+{ t } [ <min-heap> heap-empty? ] unit-test
+{ f } [ <min-heap> 1 t pick heap-push heap-empty? ] unit-test
+{ t } [ <max-heap> heap-empty? ] unit-test
+{ f } [ <max-heap> 1 t pick heap-push heap-empty? ] unit-test
! Binary Min Heap
{ 1 2 3 4 5 6 } [ 0 left 0 right 1 left 1 right 2 left 2 right ] unit-test
{ t } [ t 5 f <entry> t 3 f <entry> T{ min-heap } heap-compare ] unit-test
{ f } [ t 5 f <entry> t 3 f <entry> T{ max-heap } heap-compare ] unit-test
-[ t 2 ] [ <min-heap> t 300 pick heap-push t 200 pick heap-push t 400 pick heap-push t 3 pick heap-push t 2 pick heap-push heap-pop ] unit-test
+{ t 2 } [ <min-heap> t 300 pick heap-push t 200 pick heap-push t 400 pick heap-push t 3 pick heap-push t 2 pick heap-push heap-pop ] unit-test
-[ t 1 ] [ <min-heap> t 300 pick heap-push t 200 pick heap-push t 400 pick heap-push t 3 pick heap-push t 2 pick heap-push t 1 pick heap-push heap-pop ] unit-test
+{ t 1 } [ <min-heap> t 300 pick heap-push t 200 pick heap-push t 400 pick heap-push t 3 pick heap-push t 2 pick heap-push t 1 pick heap-push heap-pop ] unit-test
-[ t 400 ] [ <max-heap> t 300 pick heap-push t 200 pick heap-push t 400 pick heap-push t 3 pick heap-push t 2 pick heap-push t 1 pick heap-push heap-pop ] unit-test
+{ t 400 } [ <max-heap> t 300 pick heap-push t 200 pick heap-push t 400 pick heap-push t 3 pick heap-push t 2 pick heap-push t 1 pick heap-push heap-pop ] unit-test
-[ 0 ] [ <max-heap> heap-size ] unit-test
-[ 1 ] [ <max-heap> t 1 pick heap-push heap-size ] unit-test
+{ 0 } [ <max-heap> heap-size ] unit-test
+{ 1 } [ <max-heap> t 1 pick heap-push heap-size ] unit-test
+
+DEFER: (assert-heap-invariant)
+
+: heapdata-compare ( m n heap -- ? )
+ [ data>> [ nth ] curry bi@ ] keep heap-compare ; inline
+
+: ((assert-heap-invariant)) ( parent child heap heap-size -- )
+ pick over < [
+ [ [ heapdata-compare f assert= ] 2keep ] dip
+ (assert-heap-invariant)
+ ] [ 4drop ] if ;
+
+: (assert-heap-invariant) ( n heap heap-size -- )
+ [ dup left dup 1 + ] 2dip
+ [ ((assert-heap-invariant)) ] 2curry bi-curry@ bi ;
+
+: assert-heap-invariant ( heap -- )
+ dup heap-empty? [ drop ]
+ [ 0 swap dup heap-size (assert-heap-invariant) ] if ;
: heap-sort ( alist heap -- keys )
- [ heap-push-all ] keep heap-pop-all ;
+ [ heap-push-all ] keep dup assert-heap-invariant heap-pop-all ;
: random-alist ( n -- alist )
- iota [
+ <iota> [
drop 32 random-bits dup number>string
] H{ } map>assoc >alist ;
: test-entry-indices ( n -- ? )
random-alist
<min-heap> [ heap-push-all ] keep
- data>> dup length iota swap [ index>> ] map sequence= ;
+ dup assert-heap-invariant
+ data>> dup length <iota> swap [ index>> ] map sequence= ;
14 [
[ t ] swap [ 2^ test-entry-indices ] curry unit-test
] each-integer
-: sort-entries ( entries -- entries' )
- [ key>> ] sort-with ;
-
: delete-test ( n -- obj1 obj2 )
[
random-alist
<min-heap> [ heap-push-all ] keep
dup data>> clone swap
] keep 3 /i [ 2dup [ delete-random ] dip heap-delete ] times
+ dup assert-heap-invariant
data>>
[ [ key>> ] map ] bi@
- [ natural-sort ] bi@ ;
+ [ sort ] bi@ ;
11 [
[ t ] swap [ 2^ delete-test sequence= ] curry unit-test
] each-integer
+
+[| |
+ <min-heap> :> heap
+ t 1 heap heap-push* :> entry
+ heap heap-pop 2drop
+ t 2 heap heap-push
+ entry heap heap-delete ] [ bad-heap-delete? ] must-fail-with
+
+[| |
+ <min-heap> :> heap
+ t 1 heap heap-push* :> entry
+ t 2 heap heap-push
+ heap heap-pop 2drop
+ entry heap heap-delete ] [ bad-heap-delete? ] must-fail-with
+
+[| |
+ <min-heap> :> heap
+ t 1 heap heap-push* :> entry
+ t 2 heap heap-push
+ entry heap heap-delete
+ entry heap heap-delete ] [ bad-heap-delete? ] must-fail-with
+
+[| |
+ <min-heap> :> heap
+ t 0 heap heap-push
+ t 1 heap heap-push* :> entry
+ entry heap heap-delete
+ entry heap heap-delete ] [ bad-heap-delete? ] must-fail-with