# Commands covered:  trace
#
# 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.
# 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: trace.test,v 1.9 2000/08/25 20:39:32 ericm Exp $

if {[lsearch [namespace children] ::tcltest] == -1} {
    package require tcltest
    namespace import -force ::tcltest::*
}

proc traceScalar {name1 name2 op} {

    unset x
    set info
} {x {} unset}

# Array tracing on variables
test trace-5.1 {array traces fire on accesses via [array]} {
    catch {unset x}
    set x(b) 2
    trace add variable x array traceArray2
    set ::info {}
    array set x {a 1}
    set ::info
} {x {} array}
test trace-5.2 {array traces do not fire on normal accesses} {
    catch {unset x}
    set x(b) 2
    trace add variable x array traceArray2
    set ::info {}
    set x(a) 1
    set x(b) $x(a)
    set ::info
} {}
test trace-5.3 {array traces do not outlive variable} {
    catch {unset x}
    trace add variable x array traceArray2
    set ::info {}
    set x(a) 1
    unset x
    array set x {a 1}
    set ::info
} {}
test trace-5.4 {array traces properly listed in trace information} {
    catch {unset x}
    trace add variable x array traceArray2
    set result [trace list variable x]
    set result
} [list [list array traceArray2]]
test trace-5.5 {array traces properly listed in trace information} {
    catch {unset x}
    trace variable x a traceArray2
    set result [trace vinfo x]
    set result
} [list [list a traceArray2]]
test trace-5.6 {array traces don't fire on scalar variables} {
    catch {unset x}
    set x foo
    trace add variable x array traceArray2
    set ::info {}
    catch {array set x {a 1}}
    set ::info
} {}
test trace-5.7 {array traces fire for undefined variables} {
    catch {unset x}
    trace add variable x array traceArray2
    set ::info {}
    array set x {a 1}
    set ::info
} {x {} array}
    
# Trace multiple trace types at once.

test trace-5.1 {multiple ops traced at once} {
    catch {unset x}
    set info {}
    trace add variable x {read write unset} traceProc
    catch {set x}