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#!perl
use strict;
use warnings;
use Test::More tests => 15;
use Math::BigInt upgrade => 'Math::BigFloat';
use Math::BigFloat downgrade => 'Math::BigInt',
upgrade => 'Math::BigInt';
our ($CLASS, $EXPECTED_CLASS, $LIB);
$CLASS = "Math::BigInt";
$EXPECTED_CLASS = "Math::BigFloat";
$LIB = "Math::BigInt::Calc"; # backend
# simplistic test for now
is(Math::BigFloat->downgrade(), 'Math::BigInt', 'Math::BigFloat->downgrade()');
is(Math::BigFloat->upgrade(), 'Math::BigInt', 'Math::BigFloat->upgrade()');
# these downgrade
is(ref(Math::BigFloat->new("inf")), "Math::BigInt",
qq|ref(Math::BigFloat->new("inf"))|);
is(ref(Math::BigFloat->new("-inf")), "Math::BigInt",
qq|ref(Math::BigFloat->new("-inf"))|);
is(ref(Math::BigFloat->new("NaN")), "Math::BigInt",
qq|ref(Math::BigFloat->new("NaN"))|);
is(ref(Math::BigFloat->new("0")), "Math::BigInt",
qq|ref(Math::BigFloat->new("0"))|);
is(ref(Math::BigFloat->new("1")), "Math::BigInt",
qq|ref(Math::BigFloat->new("1"))|);
is(ref(Math::BigFloat->new("10")), "Math::BigInt",
qq|ref(Math::BigFloat->new("10"))|);
is(ref(Math::BigFloat->new("-10")), "Math::BigInt",
qq|ref(Math::BigFloat->new("-10"))|);
is(ref(Math::BigFloat->new("-10.0E1")), "Math::BigInt",
qq|ref(Math::BigFloat->new("-10.0E1"))|);
# bug until v1.67:
is(Math::BigFloat->new("0.2E0"), "0.2", qq|Math::BigFloat->new("0.2E0")|);
is(Math::BigFloat->new("0.2E1"), "2", qq|Math::BigFloat->new("0.2E1")|);
# until v1.67 resulted in 200:
is(Math::BigFloat->new("0.2E2"), "20", qq|Math::BigFloat->new("0.2E2")|);
# disable, otherwise it screws calculations
Math::BigFloat->upgrade(undef);
is(Math::BigFloat->upgrade() || "", "", qq/Math::BigFloat->upgrade() || ""/);
Math::BigFloat->div_scale(20); # make it a bit faster
my $x = Math::BigFloat->new(2); # downgrades
# the following test upgrade for bsqrt() and also makes new() NOT downgrade
# for the bpow() side
is(Math::BigFloat->bpow("2", "0.5"), $x->bsqrt(),
qq|Math::BigFloat->bpow("2", "0.5")|);
#require 'upgrade.inc'; # all tests here for sharing
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