# This file contains tests for the tclBasic.c source file. Tests appear in
# the same order as the C code that they test. The set of tests is
# currently incomplete since it currently includes only new tests for
# code changed for the addition of Tcl namespaces. Other variable-
# related tests appear in several other test files including
# assocd.test, cmdInfo.test, eval.test, expr.test, interp.test,
# and trace.test.
#
# Sourcing this file into Tcl runs the tests and generates output for
# errors. No output means no errors were found.
#
# Copyright (c) 1997 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: basic.test,v 1.25.2.6 2005/02/10 18:58:36 msofer Exp $
#

package require tcltest 2
namespace import -force ::tcltest::*

testConstraint testcmdtoken [llength [info commands testcmdtoken]]
testConstraint testcmdtrace [llength [info commands testcmdtrace]]
testConstraint testcreatecommand [llength [info commands testcreatecommand]]
testConstraint testevalex [llength [info commands testevalex]]
testConstraint exec [llength [info commands exec]]

# This variable needs to be changed when the major or minor version number for
# Tcl changes.
set tclvers 8.4

catch {namespace delete test_ns_basic}
catch {interp delete test_interp}
catch {rename p ""}
catch {rename q ""}
catch {rename cmd ""}
catch {unset x}

test basic-1.1 {Tcl_CreateInterp, creates interp's global namespace} {
    catch {interp delete test_interp}
    interp create test_interp
    interp eval test_interp {
        namespace eval test_ns_basic {
            proc p {} {
                return [namespace current]
            }
        }
    }
    list [interp eval test_interp {test_ns_basic::p}] \
         [interp delete test_interp]
} {::test_ns_basic {}}

test basic-2.1 {TclHideUnsafeCommands} {emptyTest} {
} {}

test basic-3.1 {Tcl_CallWhenDeleted: see dcall.test} {emptyTest} {
} {}

test basic-4.1 {Tcl_DontCallWhenDeleted: see dcall.test} {emptyTest} {
} {}

test basic-5.1 {Tcl_SetAssocData: see assoc.test} {emptyTest} {
} {}

test basic-6.1 {Tcl_DeleteAssocData: see assoc.test} {emptyTest} {
} {}

test basic-7.1 {Tcl_GetAssocData: see assoc.test} {emptyTest} {
} {}

test basic-8.1 {Tcl_InterpDeleted} {emptyTest} {
} {}

test basic-9.1 {Tcl_DeleteInterp: see interp.test} {emptyTest} {
} {}

test basic-10.1 {DeleteInterpProc, destroys interp's global namespace} {
    catch {interp delete test_interp}
    interp create test_interp
    interp eval test_interp {
        namespace eval test_ns_basic {
            namespace export p
            proc p {} {
                return [namespace current]
            }
        }
        namespace eval test_ns_2 {
            namespace import ::test_ns_basic::p
            variable v 27
            proc q {} {
                variable v
                return "[p] $v"
            }
        }
    }
    list [interp eval test_interp {test_ns_2::q}] \
         [interp eval test_interp {namespace delete ::}] \
         [catch {interp eval test_interp {set a 123}} msg] $msg \
         [interp delete test_interp]
} {{::test_ns_basic 27} {} 1 {invalid command name "set"} {}}

test basic-11.1 {HiddenCmdsDeleteProc, invalidate cached refs to deleted hidden cmd} {
    catch {interp delete test_interp}
    interp create test_interp
    interp eval test_interp {
        proc p {} {
            return 27
        }
    }
    interp alias {} localP test_interp p
    list [interp eval test_interp {p}] \
         [localP] \
         [test_interp hide p] \
         [catch {localP} msg] $msg \
         [interp delete test_interp] \
         [catch {localP} msg] $msg
} {27 27 {} 1 {invalid command name "p"} {} 1 {invalid command name "localP"}}

# NB: More tests about hide/expose are found in interp.test

test basic-12.1 {Tcl_HideCommand, names of hidden cmds can't have namespace qualifiers} {
    catch {interp delete test_interp}
    interp create test_interp
    interp eval test_interp {
        namespace eval test_ns_basic {
            proc p {} {
                return [namespace current]
            }
        }
    }
    list [catch {test_interp hide test_ns_basic::p x} msg] $msg \
	 [catch {test_interp hide x test_ns_basic::p} msg1] $msg1 \
         [interp delete test_interp]
} {1 {can only hide global namespace commands (use rename then hide)} 1 {cannot use namespace qualifiers in hidden command token (rename)} {}}

test basic-12.2 {Tcl_HideCommand, a hidden cmd remembers its containing namespace} {
    catch {namespace delete test_ns_basic}
    catch {rename cmd ""}
    proc cmd {} {   ;# note that this is global
        return [namespace current]
    }
    namespace eval test_ns_basic {
        proc hideCmd {} {
            interp hide {} cmd
        }
        proc exposeCmd {} {
            interp expose {} cmd
        }
        proc callCmd {} {
            cmd
        }
    }
    list [test_ns_basic::callCmd] \
         [test_ns_basic::hideCmd] \
         [catch {cmd} msg] $msg \
         [test_ns_basic::exposeCmd] \
         [test_ns_basic::callCmd] \
         [namespace delete test_ns_basic]
} {:: {} 1 {invalid command name "cmd"} {} :: {}}

test basic-13.1 {Tcl_ExposeCommand, a command stays in the global namespace and can not go to another namespace} {
    catch {namespace delete test_ns_basic}
    catch {rename cmd ""}
    proc cmd {} {   ;# note that this is global
        return [namespace current]
    }
    namespace eval test_ns_basic {
        proc hideCmd {} {
            interp hide {} cmd
        }
        proc exposeCmdFailing {} {
            interp expose {} cmd ::test_ns_basic::newCmd
        }
        proc exposeCmdWorkAround {} {
            interp expose {} cmd;
	    rename cmd ::test_ns_basic::newCmd;
        }
        proc callCmd {} {
            cmd
        }
    }
    list [test_ns_basic::callCmd] \
         [test_ns_basic::hideCmd] \
         [catch {test_ns_basic::exposeCmdFailing} msg] $msg \
         [test_ns_basic::exposeCmdWorkAround] \
         [test_ns_basic::newCmd] \
         [namespace delete test_ns_basic]
} {:: {} 1 {can not expose to a namespace (use expose to toplevel, then rename)} {} ::test_ns_basic {}}
test basic-13.2 {Tcl_ExposeCommand, invalidate cached refs to cmd now being exposed} {
    catch {rename p ""}
    catch {rename cmd ""}
    proc p {} {
        cmd
    }
    proc cmd {} {
        return 42
    }
    list [p] \
         [interp hide {} cmd] \
         [proc cmd {} {return Hello}] \
         [cmd] \
         [rename cmd ""] \
         [interp expose {} cmd] \
         [p]
} {42 {} {} Hello {} {} 42}

test basic-14.1 {Tcl_CreateCommand, new cmd goes into a namespace specified in its name, if any} {testcreatecommand} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    list [testcreatecommand create] \
	 [test_ns_basic::createdcommand] \
	 [testcreatecommand delete]
} {{} {CreatedCommandProc in ::test_ns_basic} {}}
test basic-14.2 {Tcl_CreateCommand, namespace code ignore single ":"s in middle or end of names} {testcreatecommand} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    catch {rename value:at: ""}
    list [testcreatecommand create2] \
	 [value:at:] \
	 [testcreatecommand delete2]
} {{} {CreatedCommandProc2 in ::} {}}

test basic-15.1 {Tcl_CreateObjCommand, new cmd goes into a namespace specified in its name, if any} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    namespace eval test_ns_basic {}
    proc test_ns_basic::cmd {} {  ;# proc requires that ns already exist
        return [namespace current]
    }
    list [test_ns_basic::cmd] \
         [namespace delete test_ns_basic]
} {::test_ns_basic {}}

test basic-16.1 {TclInvokeStringCommand} {emptyTest} {
} {}

test basic-17.1 {TclInvokeObjCommand} {emptyTest} {
} {}

test basic-18.1 {TclRenameCommand, name of existing cmd can have namespace qualifiers} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    catch {rename cmd ""}
    namespace eval test_ns_basic {
        proc p {} {
            return "p in [namespace current]"
        }
    }
    list [test_ns_basic::p] \
         [rename test_ns_basic::p test_ns_basic::q] \
         [test_ns_basic::q] 
} {{p in ::test_ns_basic} {} {p in ::test_ns_basic}}
test basic-18.2 {TclRenameCommand, existing cmd must be found} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    list [catch {rename test_ns_basic::p test_ns_basic::q} msg] $msg
} {1 {can't rename "test_ns_basic::p": command doesn't exist}}
test basic-18.3 {TclRenameCommand, delete cmd if new name is empty} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    namespace eval test_ns_basic {
        proc p {} {
            return "p in [namespace current]"
        }
    }
    list [info commands test_ns_basic::*] \
         [rename test_ns_basic::p ""] \
         [info commands test_ns_basic::*]
} {::test_ns_basic::p {} {}}
test basic-18.4 {TclRenameCommand, bad new name} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    namespace eval test_ns_basic {
        proc p {} {
            return "p in [namespace current]"
        }
    }
    rename test_ns_basic::p :::george::martha
} {}
test basic-18.5 {TclRenameCommand, new name must not already exist} {
    namespace eval test_ns_basic {
        proc q {} {
            return 42
        }
    }
    list [catch {rename test_ns_basic::q :::george::martha} msg] $msg
} {1 {can't rename to ":::george::martha": command already exists}}
test basic-18.6 {TclRenameCommand, check for command shadowing by newly renamed cmd} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    catch {rename p ""}
    catch {rename q ""}
    proc p {} {
        return "p in [namespace current]"
    }
    proc q {} {
        return "q in [namespace current]"
    }
    namespace eval test_ns_basic {
        proc callP {} {
            p
        }
    }
    list [test_ns_basic::callP] \
         [rename q test_ns_basic::p] \
         [test_ns_basic::callP]
} {{p in ::} {} {q in ::test_ns_basic}}

test basic-19.1 {Tcl_SetCommandInfo} {emptyTest} {
} {}

test basic-20.1 {Tcl_GetCommandInfo, names for commands created inside namespaces} {testcmdtoken} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    catch {rename p ""}
    catch {rename q ""}
    catch {unset x}
    set x [namespace eval test_ns_basic::test_ns_basic2 {
        # the following creates a cmd in the global namespace
        testcmdtoken create p
    }]
    list [testcmdtoken name $x] \
         [rename ::p q] \
         [testcmdtoken name $x]
} {{p ::p} {} {q ::q}}
test basic-20.2 {Tcl_GetCommandInfo, names for commands created outside namespaces} {testcmdtoken} {
    catch {rename q ""}
    set x [testcmdtoken create test_ns_basic::test_ns_basic2::p]
    list [testcmdtoken name $x] \
         [rename test_ns_basic::test_ns_basic2::p q] \
         [testcmdtoken name $x]
} {{p ::test_ns_basic::test_ns_basic2::p} {} {q ::q}}

test basic-21.1 {Tcl_GetCommandName} {emptyTest} {
} {}

test basic-22.1 {Tcl_GetCommandFullName} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    namespace eval test_ns_basic1 {
        namespace export cmd*
        proc cmd1 {} {}
        proc cmd2 {} {}
    }
    namespace eval test_ns_basic2 {
        namespace export *
        namespace import ::test_ns_basic1::*
        proc p {} {}
    }
    namespace eval test_ns_basic3 {
        namespace import ::test_ns_basic2::*
        proc q {} {}
        list [namespace which -command foreach] \
             [namespace which -command q] \
             [namespace which -command p] \
             [namespace which -command cmd1] \
             [namespace which -command ::test_ns_basic2::cmd2]
    }
} {::foreach ::test_ns_basic3::q ::test_ns_basic3::p ::test_ns_basic3::cmd1 ::test_ns_basic2::cmd2}

test basic-23.1 {Tcl_DeleteCommand} {emptyTest} {
} {}

test basic-24.1 {Tcl_DeleteCommandFromToken, invalidate all compiled code if cmd has compile proc} {
    catch {interp delete test_interp}
    catch {unset x}
    interp create test_interp
    interp eval test_interp {
        proc useSet {} {
            return [set a 123]
        }
    }
    set x [interp eval test_interp {useSet}]
    interp eval test_interp {
        rename set ""
        proc set {args} {
            return "set called with $args"
        }
    }
    list $x \
         [interp eval test_interp {useSet}] \
         [interp delete test_interp]
} {123 {set called with a 123} {}}
test basic-24.2 {Tcl_DeleteCommandFromToken, deleting commands changes command epoch} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    catch {rename p ""}
    proc p {} {
        return "global p"
    }
    namespace eval test_ns_basic {
        proc p {} {
            return "namespace p"
        }
        proc callP {} {
            p
        }
    }
    list [test_ns_basic::callP] \
         [rename test_ns_basic::p ""] \
         [test_ns_basic::callP]
} {{namespace p} {} {global p}}
test basic-24.3 {Tcl_DeleteCommandFromToken, delete imported cmds that refer to a deleted cmd} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    catch {rename p ""}
    namespace eval test_ns_basic {
        namespace export p
        proc p {} {return 42}
    }
    namespace eval test_ns_basic2 {
        namespace import ::test_ns_basic::*
        proc callP {} {
            p
        }
    }
    list [test_ns_basic2::callP] \
         [info commands test_ns_basic2::*] \
         [rename test_ns_basic::p ""] \
         [catch {test_ns_basic2::callP} msg] $msg \
         [info commands test_ns_basic2::*]
} {42 {::test_ns_basic2::callP ::test_ns_basic2::p} {} 1 {invalid command name "p"} ::test_ns_basic2::callP}

test basic-25.1 {TclCleanupCommand} {emptyTest} {
} {}

test basic-26.1 {Tcl_EvalObj: preserve object while evaling it} {
    # If object isn't preserved, errorInfo would be set to
    # "foo\n    while executing\n\"garbage bytes\"" because the object's
    # string would have been freed, leaving garbage bytes for the error
    # message.

    proc bgerror {args} {set ::x $::errorInfo}
    set fName [makeFile {} test1]
    set f [open $fName w]
    fileevent $f writable "fileevent $f writable {}; error foo"
    set x {}
    vwait x
    close $f
    removeFile test1
    rename bgerror {}
    set x
} "foo\n    while executing\n\"error foo\""

test basic-26.2 {Tcl_EvalObjEx, pure-list branch: preserve "objv"} {
    #
    # Follow the pure-list branch in a manner that
    #   a - the pure-list internal rep is destroyed by shimmering
    #   b - the command returns an error
    # As the error code in Tcl_EvalObjv accesses the list elements, this will
    # cause a segfault if [Bug 1119369] has not been fixed.
    #

    set SRC [list foo 1] ;# pure-list command 
    proc foo str {
	# Shimmer pure-list to cmdName, cleanup and error
	proc $::SRC {} {}; $::SRC
	error "BAD CALL"
    }
    catch {eval $SRC}
} 1

test basic-27.1 {Tcl_ExprLong} {emptyTest} {
} {}

test basic-28.1 {Tcl_ExprDouble} {emptyTest} {
} {}

test basic-29.1 {Tcl_ExprBoolean} {emptyTest} {
} {}

test basic-30.1 {Tcl_ExprLongObj} {emptyTest} {
} {}

test basic-31.1 {Tcl_ExprDoubleObj} {emptyTest} {
} {}

test basic-32.1 {Tcl_ExprBooleanObj} {emptyTest} {
} {}

test basic-33.1 {TclInvoke} {emptyTest} {
} {}

test basic-34.1 {TclGlobalInvoke} {emptyTest} {
} {}

test basic-35.1 {TclObjInvokeGlobal} {emptyTest} {
} {}

test basic-36.1 {TclObjInvoke, lookup of "unknown" command} {
    catch {eval namespace delete [namespace children :: test_ns_*]}
    catch {interp delete test_interp}
    interp create test_interp
    interp eval test_interp {
        proc unknown {args} {
            return "global unknown"
        }
        namespace eval test_ns_basic {
            proc unknown {args} {
                return "namespace unknown"
            }
        }
    }
    list [interp alias test_interp newAlias test_interp doesntExist] \
         [catch {interp eval test_interp {newAlias}} msg] $msg \
         [interp delete test_interp]
} {newAlias 0 {global unknown} {}}

test basic-37.1 {Tcl_ExprString: see expr.test} {emptyTest} {
} {}

test basic-38.1 {Tcl_ExprObj} {emptyTest} {
} {}

test basic-39.1 {Tcl_CreateTrace, correct command and argc/argv arguments of trace proc} {testcmdtrace} {
    testcmdtrace tracetest {set stuff [expr 14 + 16]}
} {{expr 14 + 16} {expr 14 + 16} {set stuff [expr 14 + 16]} {set stuff 30}}
test basic-39.2 {Tcl_CreateTrace, correct command and argc/argv arguments of trace proc} {testcmdtrace} {
    testcmdtrace tracetest {set stuff [info tclversion]}
} [list {info tclversion} {info tclversion} {set stuff [info tclversion]} "set stuff $tclvers"]
test basic-39.3 {Tcl_CreateTrace, correct command and argc/argv arguments of trace proc} {testcmdtrace} {
    testcmdtrace deletetest {set stuff [info tclversion]}
} $tclvers
test basic-39.4 {Tcl_CreateTrace, check that tracing doesn't cause memory faults} {testcmdtrace} {
    # Note that the proc call is the same as the variable name, and that
    # the call can be direct or indirect by way of another procedure
    proc tracer {args} {}
    proc tracedLoop {level} {
	incr level
	tracer
	foreach tracer [expr {$level==1 ? {1 2} : {}}] {tracedLoop $level}
    }
    testcmdtrace tracetest {tracedLoop 0}
} {{tracedLoop 0} {tracedLoop 0} {incr level} {incr level} tracer {tracer} {expr {$level==1 ? {1 2} : {}}} {expr {$level==1 ? {1 2} : {}}} {foreach tracer [expr {$level==1 ? {1 2} : {}}] {tracedLoop $level}} {foreach tracer {1 2} {tracedLoop $level}} {tracedLoop $level} {tracedLoop 1} {incr level} {incr level} tracer {tracer} {expr {$level==1 ? {1 2} : {}}} {expr {$level==1 ? {1 2} : {}}} {foreach tracer [expr {$level==1 ? {1 2} : {}}] {tracedLoop $level}} {foreach tracer {} {tracedLoop $level}} {tracedLoop $level} {tracedLoop 1} {incr level} {incr level} tracer {tracer} {expr {$level==1 ? {1 2} : {}}} {expr {$level==1 ? {1 2} : {}}} {foreach tracer [expr {$level==1 ? {1 2} : {}}] {tracedLoop $level}} {foreach tracer {} {tracedLoop $level}}}
catch {rename tracer {}}
catch {rename tracedLoop {}}

test basic-39.5 {Tcl_CreateObjTrace, status return TCL_ERROR} {testcmdtrace} {
    proc Error { args } { error "Shouldn't get here" }
    set x 1;
    list [catch {testcmdtrace resulttest {Error $x}} result] [set result]
} {1 {Error $x}}

test basic-39.6 {Tcl_CreateObjTrace, status return TCL_RETURN} {testcmdtrace} {
    proc Return { args } { error "Shouldn't get here" }
    set x 1;
    list [catch {testcmdtrace resulttest {Return $x}} result] [set result]
} {2 {}}

test basic-39.7 {Tcl_CreateObjTrace, status return TCL_BREAK} {testcmdtrace} {
    proc Break { args } { error "Shouldn't get here" }
    set x 1;
    list [catch {testcmdtrace resulttest {Break $x}} result] [set result]
} {3 {}}

test basic-39.8 {Tcl_CreateObjTrace, status return TCL_CONTINUE} {testcmdtrace} {
    proc Continue { args } { error "Shouldn't get here" }
    set x 1;
    list [catch {testcmdtrace resulttest {Continue $x}} result] [set result]
} {4 {}}

test basic-39.9 {Tcl_CreateObjTrace, status return unknown} {testcmdtrace} {
    proc OtherStatus { args } { error "Shouldn't get here" }
    set x 1;
    list [catch {testcmdtrace resulttest {OtherStatus $x}} result] [set result]
} {6 {}}

test basic-39.10 {Tcl_CreateTrace, correct level interpretation} {testcmdtrace} {
    proc foo {} {uplevel 1 bar}
    proc bar {} {uplevel 1 grok}
    proc grok {} {uplevel 1 spock}
    proc spock {} {uplevel 1 fascinating}
    proc fascinating {} {}
    testcmdtrace leveltest {foo}
} {foo {foo} {uplevel 1 bar} {uplevel 1 bar} bar {bar} {uplevel 1 grok} {uplevel 1 grok}}

test basic-40.1 {Tcl_DeleteTrace} {emptyTest} {
    # the above tests have tested Tcl_DeleteTrace
} {}

test basic-41.1 {Tcl_AddErrorInfo} {emptyTest} {
} {}

test basic-42.1 {Tcl_AddObjErrorInfo} {emptyTest} {
} {}

test basic-43.1 {Tcl_VarEval} {emptyTest} {
} {}

test basic-44.1 {Tcl_GlobalEval} {emptyTest} {
} {}

test basic-45.1 {Tcl_SetRecursionLimit: see interp.test} {emptyTest} {
} {}

test basic-46.1 {Tcl_AllowExceptions: exception return not allowed} {stdio} {
    catch {close $f}
    set res [catch {
	set f [open |[list [interpreter]] w+]
	fconfigure $f -buffering line
	puts $f {fconfigure stdout -buffering line}
	puts $f continue
	puts $f {puts $errorInfo}
	puts $f {puts DONE}
	set newMsg {}
	set msg {}
	while {$newMsg != "DONE"} {
	    set newMsg [gets $f]
	    append msg "${newMsg}\n"
	}
	close $f
    } error]
    list $res $msg
} {1 {invoked "continue" outside of a loop
    while executing
"continue"
DONE
}}

test basic-46.2 {Tcl_AllowExceptions: exception return not allowed} -setup {
    set fName [makeFile {
	puts hello
	break
    } BREAKtest]
} -constraints {
    exec
} -body {
    exec [interpreter] $fName
} -cleanup {
    removeFile BREAKtest
} -returnCodes error -match glob -result {hello
invoked "break" outside of a loop
    while executing
"break"
    (file "*BREAKtest" line 3)}    

test basic-46.3 {Tcl_AllowExceptions: exception return not allowed} -setup {
    set fName [makeFile {
	interp alias {} patch {} info patchlevel
	patch
	break
    } BREAKtest]
} -constraints {
    exec
} -body {
    exec [interpreter] $fName
} -cleanup {
    removeFile BREAKtest
} -returnCodes error -match glob -result {invoked "break" outside of a loop
    while executing
"break"
    (file "*BREAKtest" line 4)}    

test basic-46.4 {Tcl_AllowExceptions: exception return not allowed} -setup {
    set fName [makeFile {
	foo [set a 1] [break]
    } BREAKtest]
} -constraints {
    exec
} -body {
    exec [interpreter] $fName
} -cleanup {
    removeFile BREAKtest
} -returnCodes error -match glob -result {invoked "break" outside of a loop
    while executing
"break"
    invoked from within
"foo \[set a 1] \[break]"
    (file "*BREAKtest" line 2)}

test basic-46.5 {Tcl_AllowExceptions: exception return not allowed} -setup {
    set fName [makeFile {
	return -code return
    } BREAKtest]
} -constraints {
    exec
} -body {
    exec [interpreter] $fName
} -cleanup {
    removeFile BREAKtest
} -returnCodes error -match glob -result {command returned bad code: 2
    while executing
"return -code return"
    (file "*BREAKtest" line 2)}

test basic-47.1 {Tcl_EvalEx: check for missing close-bracket} -body {
    subst {a[set b [format cd]}
} -returnCodes error -result {missing close-bracket}

test basic-49.1 {Tcl_EvalEx: verify TCL_EVAL_GLOBAL operation} testevalex {
    set ::x global
    namespace eval ns {
        variable x namespace
        testevalex {set x changed} global
        set ::result [list $::x $x]
    } 
    namespace delete ns
    set ::result
} {changed namespace}
test basic-49.2 {Tcl_EvalEx: verify TCL_EVAL_GLOBAL operation} testevalex {
    set ::x global
    namespace eval ns {
        variable x namespace
        testevalex {set ::context $x} global
    }
    namespace delete ns
    set ::context
} {global}

# cleanup
catch {eval namespace delete [namespace children :: test_ns_*]}
catch {namespace delete george}
catch {interp delete test_interp}
catch {rename p ""}
catch {rename q ""}
catch {rename cmd ""}
catch {rename value:at: ""}
catch {unset x}
::tcltest::cleanupTests
return