#!./perl

BEGIN {
    chdir 't' if -d 't';
    @INC = ('../lib', 'lib');
    $INC{"feature.pm"} = 1; # so we don't attempt to load feature.pm
}

print "1..73\n";

# Can't require test.pl, as we're testing the use/require mechanism here.

my $test = 1;

sub _ok {
    my ($type, $got, $expected, $name) = @_;

    my $result;
    if ($type eq 'is') {
	$result = $got eq $expected;
    } elsif ($type eq 'isnt') {
	$result = $got ne $expected;
    } elsif ($type eq 'like') {
	$result = $got =~ $expected;
    } else {
	die "Unexpected type '$type'$name";
    }
    if ($result) {
	if ($name) {
	    print "ok $test - $name\n";
	} else {
	    print "ok $test\n";
	}
    } else {
	if ($name) {
	    print "not ok $test - $name\n";
	} else {
	    print "not ok $test\n";
	}
	my @caller = caller(1);
	print "# Failed test at $caller[1] line $caller[2]\n";
	print "# Got      '$got'\n";
	if ($type eq 'is') {
	    print "# Expected '$expected'\n";
	} elsif ($type eq 'isnt') {
	    print "# Expected not '$expected'\n";
	} elsif ($type eq 'like') {
	    print "# Expected $expected\n";
	}
    }
    $test = $test + 1;
    $result;
}

sub like ($$;$) {
    _ok ('like', @_);
}
sub is ($$;$) {
    _ok ('is', @_);
}
sub isnt ($$;$) {
    _ok ('isnt', @_);
}

eval "use 5";           # implicit semicolon
is ($@, '');

eval "use 5;";
is ($@, '');

eval "{use 5}";         # [perl #70884]
is ($@, '');

eval "{use 5   }";      # [perl #70884]
is ($@, '');

# new style version numbers

eval q{ use v5.5.630; };
is ($@, '');

eval q{ use 10.0.2; };
like ($@, qr/^Perl v10\.0\.2 required/);

eval "use 5.000";	# implicit semicolon
is ($@, '');

eval "use 5.000;";
is ($@, '');

eval "use 6.000;";
like ($@, qr/Perl v6\.0\.0 required--this is only \Q$^V\E, stopped/);

eval "no 6.000;";
is ($@, '');

eval "no 5.000;";
like ($@, qr/Perls since v5\.0\.0 too modern--this is \Q$^V\E, stopped/);

eval "use 5.6;";
like ($@, qr/Perl v5\.600\.0 required \(did you mean v5\.6\.0\?\)--this is only \Q$^V\E, stopped/);

eval "use 5.8;";
like ($@, qr/Perl v5\.800\.0 required \(did you mean v5\.8\.0\?\)--this is only \Q$^V\E, stopped/);

eval "use 5.9;";
like ($@, qr/Perl v5\.900\.0 required \(did you mean v5\.9\.0\?\)--this is only \Q$^V\E, stopped/);

eval "use 5.10;";
like ($@, qr/Perl v5\.100\.0 required \(did you mean v5\.10\.0\?\)--this is only \Q$^V\E, stopped/);

eval "use 5.11;";
like ($@, qr/Perl v5\.110\.0 required \(did you mean v5\.11\.0\?\)--this is only \Q$^V\E, stopped/);

eval sprintf "use %.6f;", $];
is ($@, '');


eval sprintf "use %.6f;", $] - 0.000001;
is ($@, '');

eval sprintf("use %.6f;", $] + 1);
like ($@, qr/Perl v6.\d+.\d+ required--this is only \Q$^V\E, stopped/);

eval sprintf "use %.6f;", $] + 0.00001;
like ($@, qr/Perl v5.\d+.\d+ required--this is only \Q$^V\E, stopped/);

# check that "use 5.11.0" (and higher) loads strictures
eval 'use 5.11.0; ${"foo"} = "bar";';
like ($@, qr/Can't use string \("foo"\) as a SCALAR ref while "strict refs" in use/);
# but that they can be disabled
eval 'use 5.11.0; no strict "refs"; ${"foo"} = "bar";';
is ($@, "");
# and they are properly scoped
eval '{use 5.11.0;} ${"foo"} = "bar";';
is ($@, "");

{ use test_use }	# check that subparse saves pending tokens

local $test_use::VERSION = 1.0;

eval "use test_use 0.9";
is ($@, '');

eval "use test_use 1.0";
is ($@, '');

eval "use test_use 1.01";
isnt ($@, '');

eval "use test_use 0.9 qw(fred)";
is ($@, '');

is("@test_use::got", "fred");

eval "use test_use 1.0 qw(joe)";
is ($@, '');

is("@test_use::got", "joe");

eval "use test_use 1.01 qw(freda)";
isnt($@, '');

is("@test_use::got", "joe");

{
    local $test_use::VERSION = 35.36;
    eval "use test_use v33.55";
    is ($@, '');

    eval "use test_use v100.105";
    like ($@, qr/test_use version v100.105.0 required--this is only version v35\.360\.0/);

    eval "use test_use 33.55";
    is ($@, '');

    eval "use test_use 100.105";
    like ($@, qr/test_use version 100.105 required--this is only version 35.36/);

    local $test_use::VERSION = '35.36';
    eval "use test_use v33.55";
    like ($@, '');

    eval "use test_use v100.105";
    like ($@, qr/test_use version v100.105.0 required--this is only version v35\.360\.0/);

    eval "use test_use 33.55";
    is ($@, '');

    eval "use test_use 100.105";
    like ($@, qr/test_use version 100.105 required--this is only version 35.36/);

    local $test_use::VERSION = v35.36;
    eval "use test_use v33.55";
    is ($@, '');

    eval "use test_use v100.105";
    like ($@, qr/test_use version v100.105.0 required--this is only version v35\.36\.0/);

    eval "use test_use 33.55";
    is ($@, '');

    eval "use test_use 100.105";
    like ($@, qr/test_use version 100.105 required--this is only version v35.36/);
}


{
    # Regression test for patch 14937: 
    #   Check that a .pm file with no package or VERSION doesn't core.
    # (git commit 2658f4d9934aba5f8b23afcc078dc12b3a40223)
    eval "use test_use_14937 3";
    like ($@, qr/^test_use_14937 defines neither package nor VERSION--version check failed at/);
}

my @ver = split /\./, sprintf "%vd", $^V;

foreach my $index (-3..+3) {
    foreach my $v (0, 1) {
	my @parts = @ver;
	if ($index) {
	    if ($index < 0) {
		# Jiggle one of the parts down
		--$parts[-$index - 1];
		if ($parts[-$index - 1] < 0) {
		    # perl's version number ends with '.0'
		    $parts[-$index - 1] = 0;
		    $parts[-$index - 2] -= 2;
		}
	    } else {
		# Jiggle one of the parts up
		++$parts[$index - 1];
	    }
	}
	my $v_version = sprintf "v%d.%d.%d", @parts;
	my $version;
	if ($v) {
	    $version = $v_version;
	} else {
	    $version = $parts[0] + $parts[1] / 1000 + $parts[2] / 1000000;
	}

	eval "use $version";
	if ($index > 0) {
	    # The future
	    like ($@,
		  qr/Perl $v_version required--this is only \Q$^V\E, stopped/,
		  "use $version");
	} else {
	    # The present or past
	    is ($@, '', "use $version");
	}

	eval "no $version";
	if ($index <= 0) {
	    # The present or past
	    like ($@,
		  qr/Perls since $v_version too modern--this is \Q$^V\E, stopped/,
		  "no $version");
	} else {
	    # future
	    is ($@, '', "no $version");
	}
    }
}