# Commands covered:  rename
#
# This file contains a collection of tests for one or more of the Tcl
# built-in commands.  Sourcing this file into Tcl runs the tests and
# generates output for errors.  No output means no errors were found.
#
# Copyright (c) 1991-1993 The Regents of the University of California.
# Copyright (c) 1994 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# RCS: @(#) $Id: rename.test,v 1.2 2001/09/14 01:43:47 zlaski Exp $

if {[string compare test [info procs test]] == 1} then {source defs}

# Must eliminate the "unknown" command while the test is running,
# especially if the test is being run in a program with its
# own special-purpose unknown command.

catch {rename unknown unknown.old}

catch {rename r2 {}}
proc r1 {} {return "procedure r1"}
rename r1 r2
test rename-1.1 {simple renaming} {
    r2
} {procedure r1}
test rename-1.2 {simple renaming} {
    list [catch r1 msg] $msg
} {1 {invalid command name "r1"}}
rename r2 {}
test rename-1.3 {simple renaming} {
    list [catch r2 msg] $msg
} {1 {invalid command name "r2"}}

# The test below is tricky because it renames a built-in command.
# It's possible that the test procedure uses this command, so must
# restore the command before calling test again.

rename list l.new
set a [catch list msg1]
set b [l.new a b c]
rename l.new list
set c [catch l.new msg2]
set d [list 111 222]
test rename-2.1 {renaming built-in command} {
    list $a $msg1 $b $c $msg2 $d
} {1 {invalid command name "list"} {a b c} 1 {invalid command name "l.new"} {111 222}}

test rename-3.1 {error conditions} {
    list [catch {rename r1} msg] $msg $errorCode
} {1 {wrong # args: should be "rename oldName newName"} NONE}
test rename-3.2 {error conditions} {
    list [catch {rename r1 r2 r3} msg] $msg $errorCode
} {1 {wrong # args: should be "rename oldName newName"} NONE}
test rename-3.3 {error conditions} {
    proc r1 {} {}
    proc r2 {} {}
    list [catch {rename r1 r2} msg] $msg
} {1 {can't rename to "r2": command already exists}}
test rename-3.4 {error conditions} {
    catch {rename r1 {}}
    catch {rename r2 {}}
    list [catch {rename r1 r2} msg] $msg
} {1 {can't rename "r1": command doesn't exist}}
test rename-3.5 {error conditions} {
    catch {rename _non_existent_command {}}
    list [catch {rename _non_existent_command {}} msg] $msg
} {1 {can't delete "_non_existent_command": command doesn't exist}}

catch {rename unknown {}}
catch {rename unknown.old unknown}

if {[info command testdel] == "testdel"} {
    test rename-4.1 {reentrancy issues with command deletion and renaming} {
	set x {}
	testdel {} foo {lappend x deleted; rename bar {}; lappend x [info command bar]}
	rename foo bar
	lappend x |
	rename bar {}
	set x
    } {| deleted {}}
    test rename-4.2 {reentrancy issues with command deletion and renaming} {
	set x {}
	testdel {} foo {lappend x deleted; rename foo bar}
	rename foo {}
	set x
    } {deleted}
    test rename-4.3 {reentrancy issues with command deletion and renaming} {
	set x {}
	testdel {} foo {lappend x deleted; testdel {} foo {lappend x deleted2}}
	rename foo {}
	lappend x |
	rename foo {}
	set x
    } {deleted | deleted2}
    test rename-4.4 {reentrancy issues with command deletion and renaming} {
	set x {}
	testdel {} foo {lappend x deleted; rename foo bar}
	rename foo {}
	lappend x | [info command bar]
    } {deleted | {}}
    test rename-4.5 {reentrancy issues with command deletion and renaming} {
	set env(value) before
	interp create foo
	testdel foo cmd {set env(value) deleted}
	interp delete foo
	set env(value)
    } {deleted}
    test rename-4.6 {reentrancy issues with command deletion and renaming} {
	proc kill args {
	    interp delete foo
	}
	set env(value) before
	interp create foo
	foo alias kill kill
	testdel foo cmd {set env(value) deleted; kill}
	list [catch {foo eval {rename cmd {}}} msg] $msg $env(value)
    } {0 {} deleted}
    test rename-4.7 {reentrancy issues with command deletion and renaming} {
	proc kill args {
	    interp delete foo
	}
	set env(value) before
	interp create foo
	foo alias kill kill
	testdel foo cmd {set env(value) deleted; kill}
	list [catch {interp delete foo} msg] $msg $env(value)
    } {0 {} deleted}
}

# Save the unknown procedure which is modified by the following test.

catch {rename unknown unknown.old}

test rename-5.1 {repeated rename deletion and redefinition of same command} {
    set SAVED_UNKNOWN "proc unknown "
    append SAVED_UNKNOWN "\{[info args unknown.old]\} "
    append SAVED_UNKNOWN "\{[info body unknown.old]\}"

    for {set i 0} {$i < 10} {incr i} {
        eval $SAVED_UNKNOWN
        tcl_wordBreakBefore "" 0
        rename tcl_wordBreakBefore {}
        rename unknown {}
    }
} {}

catch {rename unknown {}}
catch {rename unknown.old unknown}


test rename-6.1 {old code invalidated (epoch incremented) when cmd with compile proc is renamed } {
    proc x {} {
        set a 123
        set b [incr a]
    }
    x
    rename incr incr.old
    proc incr {} {puts "new incr called!"}
    catch {x} msg
    set msg
} {called "incr" with too many arguments}

catch {rename incr {}}
catch {rename incr.old incr}

# Make the file return an empty string (cleaner.).

set x ""