path: root/tests/for.test

# Commands covered:  for, continue, break
#
# 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) 1996 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# SCCS: @(#) for.test 1.10 97/07/02 16:40:59

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

# Basic "for" operation.

test for-1.1 {TclCompileForCmd: missing initial command} {
    list [catch {for} msg] $msg
} {1 {wrong # args: should be "for start test next command"}}
test for-1.2 {TclCompileForCmd: error in initial command} {
    list [catch {for {set}} msg] $msg $errorInfo
} {1 {wrong # args: should be "for start test next command"} {wrong # args: should be "for start test next command"
    while compiling
"for {set}"}}
catch {unset i}
test for-1.3 {TclCompileForCmd: missing test expression} {
    catch {for {set i 0}} msg
    set msg
} {wrong # args: should be "for start test next command"}
test for-1.4 {TclCompileForCmd: error in test expression} {
    catch {for {set i 0} {$i<}} msg
    set errorInfo
} {wrong # args: should be "for start test next command"
    while compiling
"for {set i 0} {$i<}"}
test for-1.5 {TclCompileForCmd: test expression is enclosed in quotes} {
    set i 0
    for {} "$i > 5" {incr i} {}
} {}
test for-1.6 {TclCompileForCmd: missing "next" command} {
    catch {for {set i 0} {$i < 5}} msg
    set msg
} {wrong # args: should be "for start test next command"}
test for-1.7 {TclCompileForCmd: missing command body} {
    catch {for {set i 0} {$i < 5} {incr i}} msg
    set msg
} {wrong # args: should be "for start test next command"}
test for-1.8 {TclCompileForCmd: error compiling command body} {
    catch {for {set i 0} {$i < 5} {incr i} {set}} msg
    set errorInfo
} {wrong # args: should be "set varName ?newValue?"
    while compiling
"set"
    ("for" body line 1)
    while compiling
"for {set i 0} {$i < 5} {incr i} {set}"}
catch {unset a}
test for-1.9 {TclCompileForCmd: simple command body} {
    set a {}
    for {set i 1} {$i<6} {set i [expr $i+1]} {
	if $i==4 break
	set a [concat $a $i]
    }
    set a
} {1 2 3}
test for-1.10 {TclCompileForCmd: command body in quotes} {
    set a {}
    for {set i 1} {$i<6} {set i [expr $i+1]} "append a x"
    set a
} {xxxxx}
test for-1.11 {TclCompileForCmd: computed command body} {
    catch {unset x1}
    catch {unset bb}
    catch {unset x2}
    set x1 {append a x1; }
    set bb {break}
    set x2 {; append a x2}
    set a {}
    for {set i 1} {$i<6} {set i [expr $i+1]} $x1$bb$x2
    set a
} {x1}
test for-1.12 {TclCompileForCmd: error in "next" command} {
    catch {for {set i 0} {$i < 5} {set} {puts $i}} msg
    set errorInfo
} {wrong # args: should be "set varName ?newValue?"
    while compiling
"set"
    ("for" loop-end command)
    while compiling
"for {set i 0} {$i < 5} {set} {puts $i}"}
test for-1.13 {TclCompileForCmd: long command body} {
    set a {}
    for {set i 1} {$i<6} {set i [expr $i+1]} {
	if $i==4 break
	if $i>5 continue
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	set a [concat $a $i]
    }
    set a
} {1 2 3}
test for-1.14 {TclCompileForCmd: for command result} {
    set a [for {set i 0} {$i < 5} {incr i} {}]
    set a
} {}
test for-1.15 {TclCompileForCmd: for command result} {
    set a [for {set i 0} {$i < 5} {incr i} {if $i==3 break}]
    set a
} {}

# Check "for" and "continue".

test for-2.1 {TclCompileContinueCmd: arguments after "continue"} {
    catch {continue foo} msg
    set msg
} {wrong # args: should be "continue"}
test for-2.2 {TclCompileContinueCmd: continue result} {
    catch continue
} 4
test for-2.3 {continue tests} {
    set a {}
    for {set i 1} {$i <= 4} {set i [expr $i+1]} {
	if {$i == 2} continue
	set a [concat $a $i]
    }
    set a
} {1 3 4}
test for-2.4 {continue tests} {
    set a {}
    for {set i 1} {$i <= 4} {set i [expr $i+1]} {
	if {$i != 2} continue
	set a [concat $a $i]
    }
    set a
} {2}
test for-2.5 {continue tests, nested loops} {
    set msg {}
    for {set i 1} {$i <= 4} {incr i} {
	for {set a 1} {$a <= 2} {incr a} {
            if {$i>=2 && $a>=2} continue
            set msg [concat $msg "$i.$a"]
        }
    }
    set msg
} {1.1 1.2 2.1 3.1 4.1}
test for-2.6 {continue tests, long command body} {
    set a {}
    for {set i 1} {$i<6} {set i [expr $i+1]} {
	if $i==2 continue
	if $i==4 break
	if $i>5 continue
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	set a [concat $a $i]
    }
    set a
} {1 3}

# Check "for" and "break".

test for-3.1 {TclCompileBreakCmd: arguments after "break"} {
    catch {break foo} msg
    set msg
} {wrong # args: should be "break"}
test for-3.2 {TclCompileBreakCmd: break result} {
    catch break
} 3
test for-3.3 {break tests} {
    set a {}
    for {set i 1} {$i <= 4} {incr i} {
	if {$i == 3} break
	set a [concat $a $i]
    }
    set a
} {1 2}
test for-3.4 {break tests, nested loops} {
    set msg {}
    for {set i 1} {$i <= 4} {incr i} {
	for {set a 1} {$a <= 2} {incr a} {
            if {$i>=2 && $a>=2} break
            set msg [concat $msg "$i.$a"]
        }
    }
    set msg
} {1.1 1.2 2.1 3.1 4.1}
test for-3.5 {break tests, long command body} {
    set a {}
    for {set i 1} {$i<6} {set i [expr $i+1]} {
	if $i==2 continue
	if $i==5 break
	if $i>5 continue
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if $i==4 break
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	if {$i>6 && $tcl_platform(machine)=="xxx"} {
	    catch {set a $a} msg
	    catch {incr i 5} msg
	    catch {incr i -5} msg
	}
	set a [concat $a $i]
    }
    set a
} {1 3}
# A simplified version of exmh's mail formatting routine to stress "for",
# "break", "while", and "if".
proc formatMail {} {
    array set lines {
        0 {Return-path: george@tcl} \
        1 {Return-path: <george@tcl>} \
        2 {Received: from tcl by tcl.Somewhere.COM (SMI-8.6/SMI-SVR4)} \
        3 {	id LAA10027; Wed, 11 Sep 1996 11:14:53 -0700} \
        4 {Message-id: <199609111814.LAA10027@tcl.Somewhere.COM>} \
        5 {X-mailer: exmh version 1.6.9 8/22/96} \
        6 {Mime-version: 1.0} \
        7 {Content-type: text/plain; charset=iso-8859-1} \
        8 {Content-transfer-encoding: quoted-printable} \
        9 {Content-length: 2162} \
        10 {To: fred} \
        11 {Subject: tcl7.6} \
        12 {Date: Wed, 11 Sep 1996 11:14:53 -0700} \
        13 {From: George <george@tcl>} \
        14 {The Tcl 7.6 and Tk 4.2 releases} \
        15 {} \
        16 {This page contains information about Tcl 7.6 and Tk4.2, which are the most recent} \
        17 {releases of the Tcl scripting language and the Tk toolkit. The first beta versions of these} \
        18 {releases were released on August 30, 1996. These releases contain only minor changes,} \
        19 {so we hope to have only a single beta release and to go final in early October, 1996. } \
        20 {} \
        21 {} \
        22 {What's new } \
        23 {} \
        24 {The most important changes in the releases are summarized below. See the README} \
        25 {and changes files in the distributions for more complete information on what has} \
        26 {changed, including both feature changes and bug fixes. } \
        27 {} \
        28 {     There are new options to the file command for copying files (file copy),} \
        29 {     deleting files and directories (file delete), creating directories (file} \
        30 {     mkdir), and renaming files (file rename). } \
        31 {     The implementation of exec has been improved greatly for Windows 95 and} \
        32 {     Windows NT. } \
        33 {     There is a new memory allocator for the Macintosh version, which should be} \
        34 {     more efficient than the old one. } \
        35 {     Tk's grid geometry manager has been completely rewritten. The layout} \
        36 {     algorithm produces much better layouts than before, especially where rows or} \
        37 {     columns were stretchable. } \
        38 {     There are new commands for creating common dialog boxes:} \
        39 {     tk_chooseColor, tk_getOpenFile, tk_getSaveFile and} \
        40 {     tk_messageBox. These use native dialog boxes if they are available. } \
        41 {     There is a new virtual event mechanism for handling events in a more portable} \
        42 {     way. See the new command event. It also allows events (both physical and} \
        43 {     virtual) to be generated dynamically. } \
        44 {} \
        45 {Tcl 7.6 and Tk 4.2 are backwards-compatible with Tcl 7.5 and Tk 4.1 except for} \
        46 {changes in the C APIs for custom channel drivers. Scripts written for earlier releases} \
        47 {should work on these new releases as well. } \
        48 {} \
        49 {Obtaining The Releases} \
        50 {} \
        51 {Binary Releases} \
        52 {} \
        53 {Pre-compiled releases are available for the following platforms: } \
        54 {} \
        55 {     Windows 3.1, Windows 95, and Windows NT: Fetch} \
        56 {     ftp://ftp.sunlabs.com/pub/tcl/win42b1.exe, then execute it. The file is a} \
        57 {     self-extracting executable. It will install the Tcl and Tk libraries, the wish and} \
        58 {     tclsh programs, and documentation. } \
        59 {     Macintosh (both 68K and PowerPC): Fetch} \
        60 {     ftp://ftp.sunlabs.com/pub/tcl/mactk4.2b1.sea.hqx. The file is in binhex format,} \
        61 {     which is understood by Fetch, StuffIt, and many other Mac utilities. The} \
        62 {     unpacked file is a self-installing executable: double-click on it and it will create a} \
        63 {     folder containing all that you need to run Tcl and Tk. } \
        64 {        UNIX (Solaris 2.* and SunOS, other systems soon to follow). Easy to install} \
        65 {     binary packages are now for sale at the Sun Labs Tcl/Tk Shop. Check it out!} \
    }

    set result ""
    set NL "
"
    set tag {level= type=text/plain part=0 sel Charset}
    set ix [lsearch -regexp $tag text/enriched]
    if {$ix < 0} {
	set ranges {}
	set quote 0
    }
    set breakrange {6.42 78.0}
    set F1 [lindex $breakrange 0]
    set F2 [lindex $breakrange 1]
    set breakrange [lrange $breakrange 2 end]
    if {[string length $F1] == 0} {
	set F1 -1
	set break 0
    } else {
	set break 1
    }

    set xmailer 0
    set inheaders 1
    set last [array size lines]
    set plen 2
    for {set L 1} {$L < $last} {incr L} {
	set line $lines($L)
	if {$inheaders} {
	    # Blank or empty line terminates headers
	    # Leading --- terminates headers
	    if {[regexp {^[ 	]*$} $line] || [regexp {^--+} $line]} {
		set inheaders 0
	    }
	    if {[regexp -nocase {^x-mailer:} $line]} {
		continue
	    }
	}
	if $inheaders {
	    set limit 55
	} else {
	    set limit 55

	    # Decide whether or not to break the body line

	    if {$plen > 0} {
		if {[string first {> } $line] == 0} {
		    # This is quoted text from previous message, don't reformat
		    append result $line $NL
		    if {$quote && !$inheaders} {
			# Fix from <sarr@umich.edu> to handle text/enriched
			if {$L > $L1 && $L < $L2 && $line != {}} {
			    # enriched requires two newlines for each one.
			    append result $NL
			} elseif {$L > $L2} {
			    set L1 [lindex $ranges 0]
			    set L2 [lindex $ranges 1]
			    set ranges [lrange $ranges 2 end]
			    set quote [llength $L1]
			}
		    }
		    continue
		}
	    }
	    if {$F1 < 0} {
		# Nothing left to format
		append result $line $NL
		continue
	    } elseif {$L < $F1} {
		# Not yet to formatted block
		append result $line $NL
		continue
	    } elseif {$L > $F2} {
		# Past formatted block
		set F1 [lindex $breakrange 0]
		set F2 [lindex $breakrange 1]
		set breakrange [lrange $breakrange 2 end]
		append result $line $NL
		if {[string length $F1] == 0} {
		    set F1 -1
		}
		continue
	    }
	}
	set climit [expr $limit-1]
	set cutoff 50
	set continuation 0
	
	while {[string length $line] > $limit} {
	    for {set c [expr $limit-1]} {$c >= $cutoff} {incr c -1} {
		set char [string index $line $c]
		if {$char == " " || $char == "\t"} {
		    break
		}
		if {$char == ">"} {	;# Hack for enriched formatting
		    break
		}
	    }
	    if {$c < $cutoff} {
		if {! $inheaders} {
		    set c [expr $limit-1]
		} else {
		    set c [string length $line]
		}
	    }
	    set newline [string range $line 0 $c]
	    if {! $continuation} {
		append result $newline $NL
	    } else {
		append result \ $newline $NL
	    }
	    incr c
	    set line [string trimright [string range $line $c end]]
	    if {$inheaders} {
		set continuation 1
		set limit $climit
	    }
	}
	if {$continuation} {
	    if {[string length $line] != 0} {
		append result \ $line $NL
	    }
	} else {
	    append result $line $NL
	    if {$quote && !$inheaders} {
		if {$L > $L1 && $L < $L2 && $line != {}} {
		    # enriched requires two newlines for each one.
		    append result "" $NL
		} elseif {$L > $L2} {
		    set L1 [lindex $ranges 0]
		    set L2 [lindex $ranges 1]
		    set ranges [lrange $ranges 2 end]
		    set quote [llength $L1]
		}
	    }
	}
    }
    return $result
}
test for-3.6 {break tests} {
    formatMail
} {Return-path: <george@tcl>
Received: from tcl by tcl.Somewhere.COM (SMI-8.6/SMI-SVR4)
	id LAA10027; Wed, 11 Sep 1996 11:14:53 -0700
Message-id: <199609111814.LAA10027@tcl.Somewhere.COM>
Mime-version: 1.0
Content-type: text/plain; charset=iso-8859-1
Content-transfer-encoding: quoted-printable
Content-length: 2162
To: fred
Subject: tcl7.6
Date: Wed, 11 Sep 1996 11:14:53 -0700
From: George <george@tcl>
The Tcl 7.6 and Tk 4.2 releases

This page contains information about Tcl 7.6 and Tk4.2,
 which are the most recent
releases of the Tcl scripting language and the Tk toolk
it. The first beta versions of these
releases were released on August 30, 1996. These releas
es contain only minor changes,
so we hope to have only a single beta release and to 
go final in early October, 1996.


What's new 

The most important changes in the releases are summariz
ed below. See the README
and changes files in the distributions for more complet
e information on what has
changed, including both feature changes and bug fixes. 

     There are new options to the file command for 
copying files (file copy),
     deleting files and directories (file delete), 
creating directories (file
     mkdir), and renaming files (file rename). 
     The implementation of exec has been improved great
ly for Windows 95 and
     Windows NT. 
     There is a new memory allocator for the Macintosh 
version, which should be
     more efficient than the old one. 
     Tk's grid geometry manager has been completely 
rewritten. The layout
     algorithm produces much better layouts than before
, especially where rows or
     columns were stretchable. 
     There are new commands for creating common dialog 
boxes:
     tk_chooseColor, tk_getOpenFile, tk_getSaveFile and
     tk_messageBox. These use native dialog boxes if 
they are available.
     There is a new virtual event mechanism for handlin
g events in a more portable
     way. See the new command event. It also allows 
events (both physical and
     virtual) to be generated dynamically. 

Tcl 7.6 and Tk 4.2 are backwards-compatible with Tcl 
7.5 and Tk 4.1 except for
changes in the C APIs for custom channel drivers. Scrip
ts written for earlier releases
should work on these new releases as well. 

Obtaining The Releases

Binary Releases

Pre-compiled releases are available for the following 
platforms:

     Windows 3.1, Windows 95, and Windows NT: Fetch
     ftp://ftp.sunlabs.com/pub/tcl/win42b1.exe, then 
execute it. The file is a
     self-extracting executable. It will install the 
Tcl and Tk libraries, the wish and
     tclsh programs, and documentation. 
     Macintosh (both 68K and PowerPC): Fetch
     ftp://ftp.sunlabs.com/pub/tcl/mactk4.2b1.sea.hqx. 
The file is in binhex format,
     which is understood by Fetch, StuffIt, and many 
other Mac utilities. The
     unpacked file is a self-installing executable: 
double-click on it and it will create a
     folder containing all that you need to run Tcl 
and Tk.
        UNIX (Solaris 2.* and SunOS, other systems 
soon to follow). Easy to install
     binary packages are now for sale at the Sun Labs 
Tcl/Tk Shop. Check it out!
}

# Check that "break" resets the interpreter's result

test for-4.1 {break must reset the interp result} {
    catch {
        set z GLOBTESTDIR/dir2/file2.c
        if [string match GLOBTESTDIR/dir2/* $z] {
            break
        }
    } j
    set j
} {}

# Check "for" and computed command names.

test for-5.1 {for and computed command names} {
    set j 0
    set z for
    $z {set i 0} {$i<10} {incr i} {set j $i}
    set j
} 9