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|
use Test::More tests => 93;
use Graph::Directed;
use Graph::Undirected;
use Graph::Traversal::BFS;
my $g0 = Graph::Undirected->new;
my $g1 = Graph::Directed->new;
my $g2 = Graph::Undirected->new; # cyclic
my $g3 = Graph::Undirected->new; # unconnetced
my $g4 = Graph::Directed->new; # cyclic
my $g5 = Graph::Directed->new; # cyclic
$g0->add_path(qw(a b c));
$g0->add_path(qw(a b d));
$g0->add_path(qw(a e f));
$g1->add_path(qw(a b c));
$g1->add_path(qw(a b d));
$g1->add_path(qw(a e f));
$g2->add_cycle(qw(a b c));
$g3->add_path(qw(a b c));
$g3->add_path(qw(d e f));
$g4->add_cycle(qw(a));
$g5->add_cycle(qw(a b c));
sub simple {
my $g = shift;
my @v = $g->vertices;
is(@_, @v, "vertices");
my %v; $v{$_} ++ for @_;
is(scalar(grep { ($v{$_} || 0) != 1 } @v), 0, "... once");
}
{
my $t = Graph::Traversal::BFS->new($g0);
is($t->unseen, $g0->vertices, "fresh traversal");
is($t->seen, 0);
is($t->seeing, 0);
my @t0 = $t->preorder;
my @t1 = $t->postorder;
my @t2 = $t->bfs;
simple($g0, @t0);
simple($g0, @t1);
simple($g0, @t2);
is($t->graph, $g0, "graph");
}
{
my @pre;
my @post;
my $t = Graph::Traversal::BFS->new($g0,
pre => sub { push @pre, $_[0] },
post => sub { push @post, $_[0] },
next_alphabetic => 1);
my @t0 = $t->preorder;
my @t1 = $t->postorder;
my @t2 = $t->bfs;
simple($g1, @t0);
simple($g1, @t1);
simple($g1, @t2);
is("@pre", "a b e c d f", "pre");
is("@post", "a b e c d f", "post");
is("@t0", "@pre", "t0");
is("@t1", "@post", "t1");
is("@t2", "@post", "t2");
is($t->unseen, 0, "unseen none");
is($t->seen, 6, "seen all");
is($t->seeing, 0, "seeing none");
is("@{[sort $t->seen]}", "a b c d e f", "seen all");
is("@{[$t->roots]}", "a", "roots");
}
{
my @pre;
my @post;
my $t = Graph::Traversal::BFS->new($g1,
pre => sub { push @pre, $_[0] },
post => sub { push @post, $_[0] },
next_alphabetic => 1,
first_root => 'b');
my @t0 = $t->preorder;
my @t1 = $t->postorder;
my @t2 = $t->bfs;
simple($g1, @t0);
simple($g1, @t1);
simple($g1, @t2);
is("@pre", "b c d a e f", "pre");
is("@post", "b c d a e f", "post");
is("@t0", "@pre", "t0");
is("@t1", "@post", "t1");
is("@t2", "@post", "t2");
is($t->unseen, 0, "unseen none");
is($t->seen, 6, "seen all");
is($t->seeing, 0, "seeing none");
is("@{[sort $t->seen]}", "a b c d e f", "seen all");
is("@{[$t->roots]}", "b a", "roots");
}
{
my $t0 = Graph::Traversal::BFS->new($g0, next_alphabetic => 1);
is($t0->next, "a", "scalar next");
$t0->terminate;
is($t0->next, undef, "terminate");
$t0->reset;
is($t0->next, "a", "after reset scalar next");
}
{
my @pre;
my @post;
my $t = Graph::Traversal::BFS->new($g2,
pre => sub { push @pre, $_[0] },
post => sub { push @post, $_[0] },
next_alphabetic => 1);
my @t0 = $t->preorder;
my @t1 = $t->postorder;
my @t2 = $t->postorder;
simple($g2, @t0);
simple($g2, @t1);
simple($g2, @t2);
is("@pre", "a b c", "pre");
is("@post", "a b c", "post");
is("@t0", "@pre", "t0");
is("@t1", "@post", "t1");
is("@t2", "@post", "t2");
is($t->unseen, 0, "unseen none");
is($t->seen, 3, "seen all");
is($t->seeing, 0, "seeing none");
is("@{[sort $t->seen]}", "a b c", "seen all");
is("@{[$t->roots]}", "a", "roots");
}
{
my @pre;
my @post;
my $t = Graph::Traversal::BFS->new($g3,
pre => sub { push @pre, $_[0] },
post => sub { push @post, $_[0] },
next_alphabetic => 1);
my @t0 = $t->preorder;
my @t1 = $t->postorder;
my @t2 = $t->postorder;
simple($g3, @t0);
simple($g3, @t1);
simple($g3, @t2);
is("@pre", "a b c d e f", "pre");
is("@post", "a b c d e f", "post");
is("@t0", "@pre", "t0");
is("@t1", "@post", "t1");
is("@t2", "@post", "t2");
is($t->unseen, 0, "unseen none");
is($t->seen, 6, "seen all");
is($t->seeing, 0, "seeing none");
is("@{[sort $t->seen]}", "a b c d e f", "seen all");
is("@{[$t->roots]}", "a d", "roots");
}
{
my @pre;
my @post;
my $t = Graph::Traversal::BFS->new($g0,
first_root => 'a',
pre => sub { push @pre, $_[0] },
post => sub { push @post, $_[0] },
next_successor => sub { shift; (reverse sort keys %{ $_[0] })[0] });
my @t0 = $t->preorder;
my @t1 = $t->postorder;
my @t2 = $t->bfs;
simple($g1, @t0);
simple($g1, @t1);
simple($g1, @t2);
is("@pre", "a e b f d c", "pre");
is("@post", "a e b f d c", "post");
is("@t0", "@pre", "t0");
is("@t1", "@post", "t1");
is("@t2", "@post", "t2");
is($t->unseen, 0, "unseen none");
is($t->seen, 6, "seen all");
is($t->seeing, 0, "seeing none");
is("@{[sort $t->seen]}", "a b c d e f", "seen all");
is("@{[$t->roots]}", "a", "roots");
}
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