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#!perl
print "1..39\n";
my $test = 0;
sub failed {
my ($got, $expected, $name) = @_;
print "not ok $test - $name\n";
my @caller = caller(1);
print "# Failed test at $caller[1] line $caller[2]\n";
if (defined $got) {
print "# Got '$got'\n";
} else {
print "# Got undef\n";
}
print "# Expected $expected\n";
return;
}
sub like {
my ($got, $pattern) = @_;
$test = $test + 1;
if (defined $got && $got =~ $pattern) {
print "ok $test\n";
# Principle of least surprise - maintain the expected interface, even
# though we aren't using it here (yet).
return 1;
}
failed($got, $pattern, $name);
}
sub is {
my ($got, $expect) = @_;
$test = $test + 1;
if (defined $expect) {
if (defined $got && $got eq $expect) {
print "ok $test\n";
return 1;
}
failed($got, "'$expect'", $name);
} else {
if (!defined $got) {
print "ok $test\n";
return 1;
}
failed($got, 'undef', $name);
}
}
sub f($$_) { my $x = shift; is("@_", $x) }
$foo = "FOO";
my $bar = "BAR";
$_ = 42;
f("FOO xy", $foo, "xy");
f("BAR zt", $bar, "zt");
f("FOO 42", $foo);
f("BAR 42", $bar);
f("y 42", substr("xy",1,1));
f("1 42", ("abcdef" =~ /abc/));
f("not undef 42", $undef || "not undef");
f(" 42", -f "no_such_file");
f("FOOBAR 42", ($foo . $bar));
f("FOOBAR 42", ($foo .= $bar));
f("FOOBAR 42", $foo);
eval q{ f("foo") };
like( $@, qr/Not enough arguments for main::f at/ );
eval q{ f(1,2,3,4) };
like( $@, qr/Too many arguments for main::f at/ );
{
my $_ = "quarante-deux";
$foo = "FOO";
$bar = "BAR";
f("FOO quarante-deux", $foo);
f("BAR quarante-deux", $bar);
f("y quarante-deux", substr("xy",1,1));
f("1 quarante-deux", ("abcdef" =~ /abc/));
f("not undef quarante-deux", $undef || "not undef");
f(" quarante-deux", -f "no_such_file");
f("FOOBAR quarante-deux", ($foo . $bar));
f("FOOBAR quarante-deux", ($foo .= $bar));
f("FOOBAR quarante-deux", $foo);
}
&f(""); # no error
sub g(_) { is(shift, $expected) }
$expected = "foo";
g("foo");
g($expected);
$_ = $expected;
g();
g;
undef $expected; &g; # $_ not passed
{ $expected = my $_ = "bar"; g() }
eval q{ sub wrong1 (_$); wrong1(1,2) };
like( $@, qr/Malformed prototype for main::wrong1/, 'wrong1' );
eval q{ sub wrong2 ($__); wrong2(1,2) };
like( $@, qr/Malformed prototype for main::wrong2/, 'wrong2' );
sub opt ($;_) {
is($_[0], "seen");
is($_[1], undef, "; has precedence over _");
}
opt("seen");
sub unop (_) { is($_[0], 11, "unary op") }
unop 11, 22; # takes only the first parameter into account
sub mymkdir (_;$) { is("@_", $expected, "mymkdir") }
$expected = $_ = "mydir"; mymkdir();
mymkdir($expected = "foo");
$expected = "foo 493"; mymkdir foo => 0755;
# $_ says modifiable, it's not passed by copy
sub double(_) { $_[0] *= 2 }
$_ = 21;
double();
is( $_, 42, '$_ is modifiable' );
{
my $_ = 22;
double();
is( $_, 44, 'my $_ is modifiable' );
}
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