# Commands covered:  append lappend

#

# 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) 1994-1996 Sun Microsystems, Inc.

# Copyright (c) 1998-1999 by Scriptics Corporation.

#

# See the file "license.terms" for information on usage and redistribution

# of this file, and for a DISCLAIMER OF ALL WARRANTIES.

#

# RCS: @(#) $Id: append.test,v 1.7.12.1 2006/10/05 11:44:04 msofer Exp $

if {[lsearch [namespace children] ::tcltest] == -1} {

    package require tcltest

    namespace import -force ::tcltest::*

}

catch {unset x}

test append-1.1 {append command} {

    catch {unset x}

    list [append x 1 2 abc "long string"] $x

} {{12abclong string} {12abclong string}}

test append-1.2 {append command} {

    set x ""

    list [append x first] [append x second] [append x third] $x

} {first firstsecond firstsecondthird firstsecondthird}

test append-1.3 {append command} {

    set x "abcd"

    append x

} abcd

test append-2.1 {long appends} {

    set x ""

    for {set i 0} {$i < 1000} {set i [expr $i+1]} {

	append x "foobar "

    }

    set y "foobar"

    set y "$y $y $y $y $y $y $y $y $y $y"

    set y "$y $y $y $y $y $y $y $y $y $y"

    set y "$y $y $y $y $y $y $y $y $y $y "

    expr {$x == $y}

} 1

test append-3.1 {append errors} {

    list [catch {append} msg] $msg

} {1 {wrong # args: should be "append varName ?value value ...?"}}

test append-3.2 {append errors} {

    set x ""

    list [catch {append x(0) 44} msg] $msg

} {1 {can't set "x(0)": variable isn't array}}

test append-3.3 {append errors} {

    catch {unset x}

    list [catch {append x} msg] $msg

} {1 {can't read "x": no such variable}}

test append-4.1 {lappend command} {

    catch {unset x}

    list [lappend x 1 2 abc "long string"] $x

} {{1 2 abc {long string}} {1 2 abc {long string}}}

test append-4.2 {lappend command} {

    set x ""

    list [lappend x first] [lappend x second] [lappend x third] $x

} {first {first second} {first second third} {first second third}}

test append-4.3 {lappend command} {

    proc foo {} {

	global x

	set x old

	unset x

	lappend x new

    }

    set result [foo]

    rename foo {}

    set result

} {new}

test append-4.4 {lappend command} {

    set x {}

    lappend x \{\  abc

} {\{\  abc}

test append-4.5 {lappend command} {

    set x {}

    lappend x \{ abc

} {\{ abc}

test append-4.6 {lappend command} {

    set x {1 2 3}

    lappend x

} {1 2 3}

test append-4.7 {lappend command} {

    set x "a\{"

    lappend x abc

} "a\\\{ abc"

test append-4.8 {lappend command} {

    set x "\\\{"

    lappend x abc

} "\\{ abc"

test append-4.9 {lappend command} {

    set x " \{"

    list [catch {lappend x abc} msg] $msg

} {1 {unmatched open brace in list}}

test append-4.10 {lappend command} {

    set x "	\{"

    list [catch {lappend x abc} msg] $msg

} {1 {unmatched open brace in list}}

test append-4.11 {lappend command} {

    set x "\{\{\{"

    list [catch {lappend x abc} msg] $msg

} {1 {unmatched open brace in list}}

test append-4.12 {lappend command} {

    set x "x \{\{\{"

    list [catch {lappend x abc} msg] $msg

} {1 {unmatched open brace in list}}

test append-4.13 {lappend command} {

    set x "x\{\{\{"

    lappend x abc

} "x\\\{\\\{\\\{ abc"

test append-4.14 {lappend command} {

    set x " "

    lappend x abc

} "abc"

test append-4.15 {lappend command} {

    set x "\\ "

    lappend x abc

} "{ } abc"

test append-4.16 {lappend command} {

    set x "x "

    lappend x abc

} "x abc"

test append-4.17 {lappend command} {

    catch {unset x}

    lappend x

} {}

test append-4.18 {lappend command} {

    catch {unset x}

    lappend x {}

} {{}}

test append-4.19 {lappend command} {

    catch {unset x}

    lappend x(0)

} {}

test append-4.20 {lappend command} {

    catch {unset x}

    lappend x(0) abc

} {abc}

unset x

test append-4.21 {lappend command} {

    set x \"

    list [catch {lappend x} msg] $msg

} {1 {unmatched open quote in list}}

test append-4.22 {lappend command} {

    set x \"

    list [catch {lappend x abc} msg] $msg

} {1 {unmatched open quote in list}}

proc check {var size} {

    set l [llength $var]

    if {$l != $size} {

	return "length mismatch: should have been $size, was $l"

    }

    for {set i 0} {$i < $size} {set i [expr $i+1]} {

	set j [lindex $var $i]

	if {$j != "item $i"} {

	    return "element $i should have been \"item $i\", was \"$j\""

	}

    }

    return ok

}

test append-5.1 {long lappends} {

    catch {unset x}

    set x ""

    for {set i 0} {$i < 300} {set i [expr $i+1]} {

	lappend x "item $i"

    }

    check $x 300

} ok

test append-6.1 {lappend errors} {

    list [catch {lappend} msg] $msg

} {1 {wrong # args: should be "lappend varName ?value value ...?"}}

test append-6.2 {lappend errors} {

    set x ""

    list [catch {lappend x(0) 44} msg] $msg

} {1 {can't set "x(0)": variable isn't array}}

test append-7.1 {lappend-created var and error in trace on that var} {

    catch {rename foo ""}

    catch {unset x}

    trace variable x w foo

    proc foo {} {global x; unset x}

    catch {lappend x 1}

    proc foo {args} {global x; unset x}

    info exists x

    set x

    lappend x 1

    list [info exists x] [catch {set x} msg] $msg

} {0 1 {can't read "x": no such variable}}

test append-7.2 {lappend var triggers read trace} {

    catch {unset myvar}

    catch {unset ::result}

    trace variable myvar r foo

    proc foo {args} {append ::result $args}

    lappend myvar a

    list [catch {set ::result} msg] $msg

} {0 {myvar {} r}}

test append-7.3 {lappend var triggers read trace, array var} {

    # The behavior of read triggers on lappend changed in 8.0 to

    # not trigger them, and was changed back in 8.4.

    catch {unset myvar}

    catch {unset ::result}

    trace variable myvar r foo

    proc foo {args} {append ::result $args}

    lappend myvar(b) a

    list [catch {set ::result} msg] $msg

} {0 {myvar b r}}

test append-7.4 {lappend var triggers read trace, array var exists} {

    catch {unset myvar}

    catch {unset ::result}

    set myvar(0) 1

    trace variable myvar r foo

    proc foo {args} {append ::result $args}

    lappend myvar(b) a

    list [catch {set ::result} msg] $msg

} {0 {myvar b r}}

test append-7.5 {append var does not trigger read trace} {

    catch {unset myvar}

    catch {unset ::result}

    trace variable myvar r foo

    proc foo {args} {append ::result $args}

    append myvar a

    info exists ::result

} {0}

catch {unset i x result y}

catch {rename foo ""}

catch {rename check ""}

# cleanup

::tcltest::cleanupTests

return