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# -*- mode: perl; -*-
use strict;
use warnings;
use Test::More tests => 15;
use Math::BigInt;
my $x;
###############################################################################
# Scalar context.
###############################################################################
my $y;
# Finite numbers.
$x = Math::BigInt -> new("-20");
$y = $x -> bfib();
is($y, "-6765", "bfib(-20)");
$x = Math::BigInt -> new("-15");
$y = $x -> bfib();
is($y, "610", "bfib(-15)");
$x = Math::BigInt -> new("-2");
$y = $x -> bfib();
is($y, "-1", "bfib(-2)");
$x = Math::BigInt -> new("-1");
$y = $x -> bfib();
is($y, "1", "bfib(-1)");
$x = Math::BigInt -> new("0");
$y = $x -> bfib();
is($y, "0", "bfib(0)");
$x = Math::BigInt -> new("1");
$y = $x -> bfib();
is($y, "1", "bfib(1)");
$x = Math::BigInt -> new("2");
$y = $x -> bfib();
is($y, "1", "bfib(2)");
$x = Math::BigInt -> new("15");
$y = $x -> bfib();
is($y, "610", "bfib(15)");
$x = Math::BigInt -> new("20");
$y = $x -> bfib();
is($y, "6765", "bfib(20)");
$x = Math::BigInt -> new("250");
$y = $x -> bfib();
is($y, "7896325826131730509282738943634332893686268675876375", "bfib(250)");
# Infinites and NaN.
$x = Math::BigInt -> binf("+");
$y = $x -> bfib();
is($y, "inf", "bfib(+inf)");
$x = Math::BigInt -> binf("-");
$y = $x -> bfib();
is($y, "NaN", "bfib(-inf)");
$x = Math::BigInt -> bnan();
$y = $x -> bfib();
is($y, "NaN", "bfib(NaN)");
###############################################################################
# List context.
###############################################################################
my @y;
$x = Math::BigInt -> new("10");
@y = $x -> bfib();
is_deeply(\@y, [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55], "bfib(10)");
$x = Math::BigInt -> new("-10");
@y = $x -> bfib();
is_deeply(\@y, [0, 1, -1, 2, -3, 5, -8, 13, -21, 34, -55], "bfib(-10)");
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