# -*- Tcl -*-
package require nx
::nx::configure defaultMethodCallProtection false
package require nx::test

namespace import ::nx::*
Test parameter count 10

::nsf::method::alias ::nx::Object set -frame object ::set

Class create O -superclass Object {
  :method init {} {
    set ::ObjectDestroy 0
    set ::firstDestroy 0
  }
  :method destroy {} {
    incr ::ObjectDestroy
    #[:info class] dealloc [current]
    next
  }
}

#
# classical simple case
#
set case "simple destroy (1)"
Test case simple-destroy-1
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
C method foo {} {
  puts stderr "==== $::case [current]"
  :destroy
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  ? "[current] set x" 1 "$::case can still access [current]"
  ? {::nsf::object::exists c1} 1 "$::case object still exists in proc"
  ? "set ::firstDestroy" 1 "firstDestroy called"
  ? "set ::ObjectDestroy" 1 "ObjectDestroy called"
}
C create c1
c1 foo

? {::nsf::object::exists c1} 0 "$::case object deleted"
? "set ::firstDestroy" 1 "firstDestroy called"


#
# simple case, destroy does not propagate, c1 survives
#
set case "simple destroy (2), destroy blocks"
Test case simple-destroy-2
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy block"}
C method foo {} {
  puts stderr "==== $::case [current]"
  :destroy
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  ? "[current] set x" 1 "$::case can still access [current]"
  ? {::nsf::object::exists c1} 1 "$::case object still exists in proc"
  ? "set ::firstDestroy" 1 "firstDestroy called"
  ? "set ::ObjectDestroy" 0 "ObjectDestroy called"
}
C create c1
c1 foo

? {::nsf::object::exists c1} 1 "$::case object deleted"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 0 "ObjectDestroy called"

#
# simple object recreate
#
set case "recreate"
Test case recreate
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
C method foo {} {
  puts stderr "==== $::case [current]"
  [:info class] create [current]
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  ? "[current] set x" 1 "$::case can still access [current]"
  ? {::nsf::object::exists c1} 1 "$::case object still exists in proc"
  ? "set ::firstDestroy" 0 "firstDestroy called"
  ? "set ::ObjectDestroy" 0 "ObjectDestroy called"
}
C create c1
c1 foo

? {::nsf::object::exists c1} 1 "$::case object deleted"
? "set ::firstDestroy" 0 "firstDestroy called"

#
# cmd rename to empty, xotcl provides its own rename and calls destroy
# .. like simple case above
#
set case "cmd rename empty (1)"
Test case rename-empty-1
Object create o
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
C method foo {} {
  puts stderr "==== $::case [current]"
  rename [current] ""
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  ? "[current] set x" 1 "$::case can still access [current]"
  ? {::nsf::object::exists c1} 1 "$::case object still exists in proc"
  ? "set ::firstDestroy" 1 "firstDestroy called"
  ? "set ::ObjectDestroy" 1 "ObjectDestroy called"
}
C create c1
c1 foo

? {::nsf::object::exists c1} 0 "$::case object still exists after proc"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 1 "ObjectDestroy called"

#
# cmd rename to empty, xotcl provides its own rename and calls
# destroy, but destroy does not propagate, c1 survives rename, since
# this is the situation like above, as long xotcl's rename is used.
#
set case "cmd rename empty (2)"
Test case rename-empty-2
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy block"}
C method foo {} {
  puts stderr "==== $::case [current]"
  rename [current] ""
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  ? "[current] set x" 1 "$::case can still access [current]"
  ? {::nsf::object::exists c1} 1 "$::case object still exists in proc"
  ? "set ::firstDestroy" 1 "firstDestroy called"
  ? "set ::ObjectDestroy" 0 "ObjectDestroy called"
}
C create c1
c1 foo

#puts stderr ======[c1 set x]
? {::nsf::object::exists c1} 1 "$::case object still exists after proc"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 0 "ObjectDestroy called"

#
# cmd rename other xotcl object to current, 
# xotcl's rename invokes a move 
#
set case "cmd rename object to current"
Test case rename-to-current
Object create o
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
C method foo {} {
  puts stderr "==== $::case [current]"
  rename o [current]
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  ? "[current] set x" 1 "$::case can still access [current]"
  ? {::nsf::object::exists c1} 1 "$::case object still exists in proc"
  ? "set ::firstDestroy" 0 "firstDestroy called"
  ? "set ::ObjectDestroy" 0 "ObjectDestroy called"
}
C create c1
c1 foo

? {::nsf::object::exists c1} 1 "$::case object still exists after proc"
? "set ::firstDestroy" 0 "firstDestroy called"
? "set ::ObjectDestroy" 0 "ObjectDestroy called"

#
# cmd rename other proc to current object, 
# xotcl's rename invokes a move 
#
set case "cmd rename proc to current"
Test case rename-proc-to-current
proc o args {}
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
C method foo {} {
  puts stderr "==== $::case [current]"
  set x [catch {rename o [current]}]
  ? "set _ $x" 1 "$::case tcl refuses to rename into an existing command"
}
C create c1
c1 foo
? {::nsf::object::exists c1} 1 "$::case object still exists after proc"
? "set ::firstDestroy" 0 "firstDestroy called"
? "set ::ObjectDestroy" 0 "ObjectDestroy called"


#
# namespace delete: tcl delays delete until the namespace is not
# active anymore. destroy is called after BBBB. Hypothesis: destroy is
# called only when we are lucky, since C might be destroyed before c1
# by the namespace delete
#

set case "delete parent namespace (1)"
Test case delete-parent-namespace
namespace eval ::test {
  Class create C -superclass O
  C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
  C method foo {} {
    puts stderr "==== $::case [current]"
    namespace delete ::test
    
    puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
    :set x 1
    #
    # If the following line is commented in, the namespace is deleted
    # here. Is there a bug with nsPtr->activationCount
    #
    #? "[current] set x" 1 "$::case can still access [current]"
    puts stderr "BBB"
    puts stderr "???? [current] exists [::nsf::object::exists [current]]"
    ? "::nsf::object::exists [current]" 0 ;# WHY?
    puts stderr "???? [current] exists [::nsf::object::exists [current]]"
    ? "set ::firstDestroy" 0 "firstDestroy called"
    ? "set ::ObjectDestroy" 0 "$::case destroy not yet called"
  }
}
test::C create test::c1
test::c1 foo

? {::nsf::object::exists test::c1} 0  "object still exists after proc"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 1 "destroy was called when poping stack frame"
? {::nsf::object::exists ::test::C} 0  "class still exists after proc"
? {namespace exists ::test::C} 0  "namespace ::test::C still exists after proc"
? {namespace exists ::test} 1  "parent ::test namespace still exists after proc"
? {namespace exists ::xotcl::classes::test::C} 0  "namespace ::xotcl::classes::test::C still exists after proc"

#
# namespace delete: tcl delays delete until the namespace is not
# active anymore. destroy is called after BBBB, but does not
# propagate.  
#
set case "delete parent namespace (2)"
Test case delete-parent-namespace-2
namespace eval ::test {
  ? {namespace exists test::C} 0 "exists test::C"
  Class create C -superclass O
  C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy block"}
  C method foo {} {
    puts stderr "==== $::case [current]"
    namespace delete ::test
    puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
    :set x 1
    #
    # If the following line is commented in, the namespace is deleted
    # here. Is there a bug with nsPtr->activationCount
    #
    #? "[current] set x" 1 "$::case can still access [current]"
    puts stderr "BBBB"
    puts stderr "???? [current] exists [::nsf::object::exists [current]]"
    ? "::nsf::object::exists [current]" 0 "$::case object still exists in proc";# WHY?
    puts stderr "???? [current] exists [::nsf::object::exists [current]]"
    ? "set ::firstDestroy" 0 "firstDestroy called"
    ? "set ::ObjectDestroy" 0  "ObjectDestroy called"; # NOT YET CALLED
  }
}
test::C create test::c1
test::c1 foo

? {::nsf::object::exists test::c1} 0  "$::case object still exists after proc"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 0 "ObjectDestroy called"  ;# toplevel destroy was blocked

#
# controlled namespace delete: xotcl has its own namespace cleanup,
# topological order should be always ok. however, the object o::c1 is
# already deleted, while a method of it is excuted
#
set case "delete parent object (1)"
Test case delete-parent-object
Object create o
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
C method foo {} {
  puts stderr "==== $::case [current]"
  o destroy
  puts stderr "AAAA"
  # the following object::exists call has a problem in Tcl_GetCommandFromObj(), 
  # which tries to access invalid memory
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  #? "[current] set x" 1 "$::case can still access [current]"
  puts stderr "BBBB"
  ? {::nsf::object::exists ::o::c1} 0 "$::case object still exists in proc"
  ? "set ::firstDestroy" 1 "firstDestroy called"
  ? "set ::ObjectDestroy" 1 "ObjectDestroy called"
}
C create o::c1
o::c1 foo

? {::nsf::object::exists ::o::c1} 0 "$::case object o::c1 still exists after proc"
? {::nsf::object::exists o} 0 "$::case object o still exists after proc"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 1 "ObjectDestroy called"

#
# controlled namespace delete: xotcl has its own namespace cleanup.
# destroy does not delegate, but still o::c1 does not survive, since o
# is deleted.
#
set case "delete parent object (2)"
Test case delete-parent-object-2
Object create o
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy block"}
C method foo {} {
  puts stderr "==== $::case [current]"
  o destroy
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  #? "[current] set x" 1 "$::case can still access [current]"
  puts stderr "BBB"
  ? {::nsf::object::exists ::o::c1} 0 "$::case object still exists in proc"
  ? "set ::firstDestroy" 1 "firstDestroy called"
  ? "set ::ObjectDestroy" 0 "ObjectDestroy called"
}
C create o::c1
o::c1 foo

? {::nsf::object::exists ::o::c1} 0 "$::case object still exists after proc"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 0 "ObjectDestroy called"


#
# create an other cmd with the current object's name. 
# xotcl 1.6 crashed on this test
#
set case "redefined current object as proc"
Test case redefined-current-object-as-proc
Object create o
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
C method foo {} {
  puts stderr "==== $::case [current]"
  proc [current] {args} {puts HELLO}
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  #? "[current] set x" 1 "$::case can still access [current]"
  puts stderr "BBB"
  ? "set ::firstDestroy" 1 "firstDestroy called"
  ? "set ::ObjectDestroy" 1 "ObjectDestroy called"
  ? {::nsf::object::exists c1} 0 "$::case object still exists in proc"
}
C create c1
c1 foo

? {::nsf::object::exists c1} 0 "$::case object still exists after proc"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 1 "ObjectDestroy called"



#
# delete the active class
#
set case "delete active class"
Test case delete-active-class
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
C method foo {} {
  puts stderr "==== $::case [current]"
  C destroy
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  #? "[current] set x" 1 "$::case can still access [current]"
  puts stderr "BBB"
  #? [:info class] ::xotcl::Object "object reclassed"
  ? [:info class] ::C "object reclassed?"
  ? "set ::firstDestroy" 0 "firstDestroy called"
  ? "set ::ObjectDestroy" 0 "ObjectDestroy called"
  ? {::nsf::object::exists c1} 1 "object still exists in proc"
  #? {::nsf::is class ::C} 0 "class still exists in proc"
  ? {::nsf::is class ::C} 1 "class still exists in proc"
}
C create c1
c1 foo

? {::nsf::object::exists c1} 1 "object still exists after proc"
? [c1 info class] ::nx::Object "after proc: object reclassed?"
? "set ::firstDestroy" 0 "firstDestroy called"
? "set ::ObjectDestroy" 0 "ObjectDestroy called"

#
# delete active object nested in class
#
set case "delete active object nested in class"
Test case delete-active-object-nested-in-class
Class create C -superclass O
C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
C method foo {} {
  puts stderr "==== $::case [current]"
  C destroy
  puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
  :set x 1
  #? "[current] set x" 1 "$::case can still access [current]"
  puts stderr "BBB"
  #? "set ::firstDestroy" 0 "firstDestroy called"
  ? "set ::firstDestroy" 1 "firstDestroy called"
  #? "set ::ObjectDestroy" 0 "ObjectDestroy called"
  ? "set ::ObjectDestroy" 1 "ObjectDestroy called"
  ? [:info class] ::C "object reclassed"
  #? [:info class] ::xotcl::Object "object reclassed"
  ? {::nsf::object::exists ::C::c1} 1 "object still exists in proc"
  ? {::nsf::is class ::C} 1 "class still exists in proc"
}
C create ::C::c1
C::c1 foo
#puts stderr ======[::nsf::object::exists ::C::c1]
? {::nsf::object::exists ::C::c1} 0 "object still exists after proc"
? {::nsf::is class ::C} 0 "class still exists after proc"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 1 "ObjectDestroy called"

#
Test case nesting-destroy {
  Object create x
  Object create x::y
  x destroy
  ? {::nsf::object::exists x} 0 "parent object gone"
  ? {::nsf::object::exists x::y} 0 "child object gone"
}

Test case deleting-aliased-object1 {
  Object create o
  Object create o2
  # behave like an ensemble: aliased object has self of the caller
  ::nsf::object::property o2 keepcallerself 1
  ::nsf::method::alias o a o2
  ? {o a} ::o2 "call object via alias"
  ? {o info method type a} alias
  ## the ensemble-object needs per-object methods
  o2 method info args {:info {*}$args}
  o2 method set args {:set {*}$args}
  ? {o a info vars} "" "call info on aliased object"
  ? {o set x 10} 10   "set variable on object"
  ? {o info vars} x   "query vars"
  ? {o a info vars} x  "query vars via alias"
  ? {o a set x} 10     "set var via alias"
  o2 destroy
  #? {o a info vars} "Trying to dispatch deleted object via method 'a'" "1st call on deleted object"
  #? {o a info vars} "::o: unable to dispatch method 'a'" "2nd call on deleted object"
  ? {o a info vars} {target "o2" of alias a apparently disappeared} "1st call on deleted object"
  ? {o a info vars} {target "o2" of alias a apparently disappeared} "2nd call on deleted object"
}

Test case deleting-aliased-object2 {
  Object create o
  Object create o2
  # The methods of the aliased object have their own self
  ::nsf::method::alias o a o2
  ? {o a} ::o2 "call object via alias"
  ? {o info method type a} alias
  # In order to avoid recursive calles, we have to provide the
  # selector for the method definitions in nx::Object
  o2 method info args {: ::nsf::classes::nx::Object::info {*}$args}
  o2 method set args {: ::nsf::classes::nx::Object::set {*}$args}

  ? {o a info vars} ""   "call info on aliased object"
  ? {o set x 10} 10     "set variable on object o"
  ? {o info vars} x     "query vars of o"
  ? {o a info vars} ""  "query vars via alias (from o2)"
  ? {o a set y 1} 1     "set var via alias (on o2)"
  ? {o a info vars} y   "query vars via alias (from o2)"
  o2 destroy
  #? {o a info vars} "Trying to dispatch deleted object via method 'a'" "1st call on deleted object"
  #? {o a info vars} "::o: unable to dispatch method 'a'" "2nd call on deleted object"
  ? {o a info vars} {target "o2" of alias a apparently disappeared} "1st call on deleted object"
  ? {o a info vars} {target "o2" of alias a apparently disappeared} "2nd call on deleted object"
}

set case "deleting object with alias to object"
Test case deleting-object-with-alias-to-object
Object create o
Object create o3
::nsf::method::alias o x o3
o destroy
? {::nsf::object::exists o} 0 "parent object gone"
? {::nsf::object::exists o3} 1 "aliased object still here"
o3 destroy
? {::nsf::object::exists o3} 0 "aliased object destroyed"

set case "create an alias, and delete cmd via aggregation"
Test case create-alias-delete-via-aggregation
Object create o
Object create o3
::nsf::method::alias o x o3
#o::x destroy
o3 destroy
? {o x foo} {target "o3" of alias x apparently disappeared}
#? {o x foo} {Trying to dispatch deleted object via method 'x'}
? {::nsf::object::exists o3} 0 "aliased object destroyed"
o destroy

#
# create an alias, and recreate obj
#
Test case create-alias-and-recreate-obj {
  Object create o
  Object create o3
  o alias x o3
  Object create o3
  o3 method set args {: ::nsf::classes::nx::Object::set {*}$args}
  o x set a 13
  ? {o x set a} 13 "aliased object works after recreate"
}

#
# create an alias on the class level, double aliasing, delete aliased
# object
#
Test case create-alias-on-class-delete-aliased-obj {
  Class create C
  Object create o
  Object create o3

  ::nsf::object::property o keepcallerself 1
  ::nsf::object::property o3 keepcallerself 1
  o alias a o3
  C alias b o

  o3 method set args {: ::nsf::classes::nx::Object::set {*}$args}
  o method set args {: ::nsf::classes::nx::Object::set {*}$args}

  C create c1
  ? {c1 b set B 2} 2 "call 1st level"
  ? {c1 b a set A 3} 3 "call 2nd level"
  
  ? {c1 set B} 2 "call 1st level ok"
  ? {c1 set A} 3 "call 2nd level ok"
  o destroy
  #? {c1 b} "Trying to dispatch deleted object via method 'b'" "call via alias to deleted object"
  ? {c1 b} {target "o" of alias b apparently disappeared} "call via alias to deleted object"
}

#
# create an alias on the class level, double aliasing, destroy class
#
Test case create-alias-on-class-destroy-class {
  Class create C
  Object create o
  Object create o3
  o alias a o3
  C alias b o
  C create c1
  C destroy
  ? {::nsf::object::exists o} 1 "object o still here"
  ? {::nsf::object::exists o3} 1 "object o3 still here"
}

#
# test cases where preexisting namespaces are re-used
#

Test case module {
  # create a namespace with an object/class in it
  namespace eval ::module { Object create foo }
  
  # reuse the namespace for a class/object
  Class create ::module

  ? {::nsf::is class ::module} 1

  # delete the object/class ... and namespace
  ::module destroy

  ? {::nsf::is class ::module} 0
}

Test case namespace-import {

  namespace eval ::module {
    Class create Foo {
      :create foo
    }
    namespace export Foo foo
  }
  Class create ::module {
    :create mod1
  }
  ? {::nsf::is class ::module::Foo} 1
  ? {::nsf::is class ::module::foo} 0
  ? {::nsf::object::exists ::module::foo} 1
  ? {::nsf::is class ::module} 1

  Object create ::o { :require namespace }
  namespace eval ::o {namespace import ::module::*}

  ? {::nsf::is class ::o::Foo} 1
  ? {::nsf::object::exists ::o::foo} 1

  # do not destroy namespace imported objects/classes
  ::o destroy

  ? {::nsf::is class ::o::Foo} 0
  ? {::nsf::object::exists ::o::foo} 0

  ? {::nsf::is class ::module::Foo} 1
  ? {::nsf::object::exists ::module::foo} 1

  ::module destroy
}

# to avoid CallDirectly, we could activate this line
::nx::Class create M {:method dealloc args {next}}
Test case delete-parent-namespace-dealloc
namespace eval ::test {
  Class create C -superclass O
  C method destroy {} {incr ::firstDestroy; puts stderr "  *** [current] destroy"; next}
  C method foo {} {
    puts stderr "==== $::case [current]"
    namespace delete ::test
    puts stderr "AAAA [current] exists [::nsf::object::exists [current]]"
    :set x 1
    #
    # If the following line is commented in, the namespace is deleted
    # here. Is there a bug with nsPtr->activationCount
    #
    #? "[current] set x" 1 "$::case can still access [current]"
    puts stderr "???? [current] exists [::nsf::object::exists [current]]"
    ? "::nsf::object::exists [current]" 0 ;# WHY?
    puts stderr "???? [current] exists [::nsf::object::exists [current]]"
    ? "set ::firstDestroy" 0 "firstDestroy called"
    ? "set ::ObjectDestroy" 0 "$::case destroy not yet called"
  }
}
test::C create test::c1
test::c1 foo
? {::nsf::object::exists test::c1} 0  "object still exists after proc"
? "set ::firstDestroy" 1 "firstDestroy called"
? "set ::ObjectDestroy" 1 "destroy was called when poping stack frame"
? {::nsf::object::exists ::test::C} 0  "class still exists after proc"
? {namespace exists ::test::C} 0  "namespace ::test::C still exists after proc"
? {namespace exists ::test} 1  "parent ::test namespace still exists after proc"
? {namespace exists ::xotcl::classes::test::C} 0  "namespace ::xotcl::classes::test::C still exists after proc"

Test case destroy-during-init {
  # create class
  nx::Class create Foo {
    :public method bar {} {return 1}
    :public method baz {} {return 2}
  }
  
  # create object
  Foo create f1 { :bar; :baz; :destroy } 

  ? {info command f1} "" "explicit destroy of object"

  set c [nx::Class new {
    :public method bar {} {return 1}
    :public method baz {} {return 2}
    :new { :bar; :baz; :destroy }
    :destroy
  }]

  ? [list info command $c] "" "explicit destroy of class"

  # create new class and object and cleanup everything
  set x [nx::Class new {
    :volatile
    :public method bar {} {return 1}
    :public method baz {} {return 2}
    :new { :volatile; :bar; :baz }
  }]
  
  ? [list info command $x] "" "destroy via volatile"
  
  set x [nx::Class new -volatile {
    :public method bar {} {return 1}
    :public method baz {} {return 2}
    :new { :volatile; :bar; :baz }
  }]
  
  ? [list info command $x] $x "destroy via volatile method"

  # create new class and object and cleanup everything + 2 filters

  ::nx::Object public method f1 args {next}
  ::nx::Object public method f2 args {next}
  ::nx::Object filter {f1 f2}

  set x [nx::Class new {
    :volatile
    :public method bar {} {return 1}
    :public method baz {} {return 2}
    :new { :volatile; :bar; :baz }
  }]
  
  ? [list info command $x] "" "destroy via volatile + 2 filters"
  
  set x [nx::Class new -volatile {
    :public method bar {} {return 1}
    :public method baz {} {return 2}
    :new { :volatile; :bar; :baz }
  }]
  
  ? [list info command $x] $x "destroy via volatile method + 2 filters"

  ::nx::Object filter ""
}

Test case nested-ordered-composite {
  # The following test case an explicit deletion/redefinition of an
  # toplevel object (o1) will cause the implicit deletion of a nested
  # object o1::o2. The object o2 has as well several included objects,
  # containing an "ordered composite". The deletion of the ordered
  # compostite causes the (explicit) deletion of its siblings (all
  # children of o1::o2). This is actually a stress test for the deletion
  # of o2's namespace, since the loop over its children will be
  # confronted with the deletion of indirectly deleted items (deleted by
  # the deletion of the ordered composite).

  Class create C {
    :property os
    :public method destroy {} {
      #puts stderr "[self] destroy ${:os}"
      foreach o ${:os} {
	if {[::nsf::object::exists $o]} {
	  #puts stderr "--D $o destroy"
	  $o destroy
	}
	next
      }
    }
  }
  #
  # 10 siblings of oc1:
  # deletion order in bucket: 8 4 10 9 5 1 6 2 oc1 7 3
  # oc1 deletes 7 and 3, fine
  # ... loop might run into an epoched cmd -> might crash
  #

  set c 0
  for {set i 0} {$i < 10} {incr i} {
    set os [list]
    for {set j 0} {$j < 10} {incr j} {lappend os ::o1::o2::[incr c]}
    Object create ::o1
    Object create ::o1::o2
    foreach o $os {Object create $o}
    C create ::o1::o2::oc1 -os $os
    ? {llength [o1 info children]} 1
    ? {llength [o1::o2 info children]} 11
  }

  ### 20 siblings of oc1 (has to be >12):
  # deletion order in bucket: 17 18 1 20 19 2 3 4 5 6 7 8 9 19 11 oc1 12 13 14 15 16
  # oc1 deletes 12 13 14 15 16
  # after destroy of oc1 
  #  a) NextHashEntry(hSearch) returns valid looking hPtr
  #  b) Tcl_GetHashValue(hPtr) returns garbage (uninitialized memory?) instead of cmd
  # --> might crash
  # 
  set c 0
  for {set i 0} {$i < 10} {incr i} {
    set os [list]
    for {set j 0} {$j < 20} {incr j} {lappend os ::o1::o2::[incr c]}
    Object create ::o1
    Object create ::o1::o2
    foreach o $os {Object create $o}
    C create ::o1::o2::oc1 -os $os
    ? {llength [o1 info children]} 1
    ? {llength [o1::o2 info children]} 21
  }

  # similar to above, but this time partial deletes occur
  set c 0
  for {set i 0} {$i < 10} {incr i} {
    set os [list]
    for {set j 0} {$j < 20} {incr j} {lappend os ::o1::o2::[incr c]}
    Object create ::o1
    Object create ::o1::o2
    foreach o $os {Object create $o}
    C create ::o1::o2::ocX -os {}
    C create ::o1::o2::ocY -os $os
    ? {llength [o1 info children]} 1
    ? {llength [o1::o2 info children]} 22
  }
}


#
# The following tests the deletion order triggering implict
# deletions. This caused a crash in nsf 2.0b2.
#

package req nx::serializer

nx::Test case class-object-property {
  Class create C {
    :class property x
    :property a:int
  }

  ? {::nsf::object::exists ::C} 1
  ? {::nsf::object::exists ::C::slot} 1
  
  set s(C) [C serialize]
  C destroy

  ? {::nsf::object::exists ::C} 0
  ? {::nsf::object::exists ::C::slot} 0

  eval $s(C)

  ? {::nsf::object::exists ::C} 1
  ? {::nsf::object::exists ::C::slot} 1

  C::slot destroy
  ? {::nsf::object::exists ::C} 1
  ? {::nsf::object::exists ::C::slot} 0

  C destroy
  ? {::nsf::object::exists ::C} 0
}

nx::Test case unset-traces-during-cleanup {
  global i
  set i [interp create]
  $i eval {
    package req nx
    nx::Object create o {
      set :x 100
      ::trace add variable :x unset "[list set ::X ${:x}];#"
    }
  }

  ? {$i eval {info exists ::X}} 0
  $i eval {::nsf::finalize -keepvars}
  ? {$i eval {info exists ::X}} 1
  ? {$i eval {set ::X}} 100

  interp delete $i
  unset i
}

nx::Test case unset-traces-during-cleanup-with-destroy {
  #
  # Make sure that a very-late destroy (in the unset trace) does not
  # fire ... and does not cause any side effects.
  #
  global i
  set i [interp create]
  $i eval {
    package req nx
    nx::Object create o {
      :public method destroy args {
	incr ::X
	next
      } 
      set :x 100
      ::trace add variable :x unset "[list ::incr ::X]; [list [self] destroy];#"
    }
  }

  ? {$i eval {info exists ::X}} 0
  $i eval {::nsf::finalize -keepvars}
  ? {$i eval {info exists ::X}} 1
  ? {$i eval {set ::X}} 2

  interp delete $i
  unset i
}

nx::Test case unset-traces-during-cleanup-with-destroy-2 {
  #
  # We are safe when trying to delete the base class/metaclass ...
  #
  global i
  set i [interp create]
  $i eval {
    package req nx
    nx::Object create o {
      set :x _
      ::trace add variable :x unset "[list catch [list ::nx::Object destroy] msg1]; [list catch [list ::nx::Class destroy] msg2]; set ::MSG \[list \$msg1 \$msg2\];#"
    }
  }
  
  ? {$i eval {info exists ::MSG}} 0
  $i eval {::nsf::finalize -keepvars}
  ? {$i eval {info exists ::MSG}} 1
  ? {$i eval {set ::MSG}} [list "Cannot destroy base class ::nx::Object" "Cannot destroy base class ::nx::Class"]

  interp delete $i
  unset i
}

nx::Test case unset-traces-during-cleanup-with-reset {
  #
  # Check for leaks ...
  #
  global i
  set i [interp create]
  $i eval {
    package req nx
    nx::Object create o {
      set :x 100
      ::trace add variable :x unset "[list ::nsf::var::set [self] x ${:x}];#"
    }
  }

  ? {$i eval {::nsf::object::exists ::o}} 1
  ? {$i eval {info commands ::o}} ::o
  $i eval {::nsf::finalize -keepvars}
  ? {$i eval {info commands ::o}} ""

  interp delete $i
  unset i
}