# -*- tcl -*-
# Graph ops tests - Minimum spanning tree/forest per Kruskal
# Copyright (c) 2008 Andreas Kupries <andreas_kupries@users.sourceforge.net>
# All rights reserved.
# RCS: @(#) $Id: kruskal.test,v 1.3 2009/09/15 19:24:12 andreas_kupries Exp $

# Syntax: struct::graph::op::kruskal G

# -------------------------------------------------------------------------
# Wrong # args: Missing, Too many

test graphop-t${treeimpl}-g${impl}-s${setimpl}-st${stkimpl}-q${queimpl}-kruskal-1.0 {kruskal, wrong args, missing} {
    catch {struct::graph::op::kruskal} msg
    set msg
} [tcltest::wrongNumArgs struct::graph::op::kruskal {g} 0]

test graphop-t${treeimpl}-g${impl}-s${setimpl}-st${stkimpl}-q${queimpl}-kruskal-1.1 {kruskal, wrong args, too many} {
    catch {struct::graph::op::kruskal g x} msg
    set msg
} [tcltest::tooManyArgs struct::graph::op::kruskal {g}]

# -------------------------------------------------------------------------
# Logical arguments checks and failures

test graphop-t${treeimpl}-g${impl}-s${setimpl}-st${stkimpl}-q${queimpl}-kruskal-2.0 {kruskal, arcs without weights} {
    SETUP
    mygraph node insert 0 1
    mygraph arc  insert 0 1 a
    catch {struct::graph::op::kruskal mygraph} msg
    set msg
} {Operation invalid for graph with unweighted arcs.}

# -------------------------------------------------------------------------
# Ok arguments.

test graphop-t${treeimpl}-g${impl}-s${setimpl}-st${stkimpl}-q${queimpl}-kruskal-3.0 {kruskal, empty graph} {
    SETUP
    set result [struct::graph::op::kruskal mygraph]
    mygraph destroy
    set result
} {}

test graphop-t${treeimpl}-g${impl}-s${setimpl}-st${stkimpl}-q${queimpl}-kruskal-3.1 {kruskal, nodes, no arcs} {
    SETUP
    mygraph node insert 0 1 2 3 4 5
    set result [struct::graph::op::kruskal mygraph]
    mygraph destroy
    set result
} {}

test graphop-t${treeimpl}-g${impl}-s${setimpl}-st${stkimpl}-q${queimpl}-kruskal-3.2 {kruskal, nodes, arcs} {
    SETUP_A
    set result [lsort -dict [struct::graph::op::kruskal mygraph]]
    mygraph destroy
    set result
} {'arc0_1' 'arc0_3' 'arc3_2' 'arc3_4' 'arc3_6' 'arc6_5'}

# ---------------------------------------------------