1package Math::GSL::Spline::Test;
2use base 'Test::Class';
3use Test::More  tests => 38;
4use Math::GSL::Errno  qw/:all/;
5use Math::GSL::Test   qw/:all/;
6use Math::GSL::Spline qw/:all/;
7use Math::GSL::Interp qw/:all/;
8use Test::Exception;
9use Data::Dumper;
10use strict;
11use warnings;
12
13BEGIN{ gsl_set_error_handler_off() };
14
15sub make_fixture : Test(setup) {
16    my $self = shift;
17    $self->{spline} = gsl_spline_alloc($gsl_interp_linear,100);
18}
19
20sub teardown : Test(teardown) {
21}
22sub TEST_FREE : Test {
23    my $self = shift;
24
25    ## Seems that early versions do not clear $!
26    $! = undef if $] <= 5.008009;
27
28    gsl_spline_free($self->{spline});
29
30    ok(!$@ && !$! && !$?,'gsl_spline_free');
31}
32sub TEST_MIN_SIZE : Test {
33    my $self = shift;
34    cmp_ok(2,'==',gsl_spline_min_size($self->{spline}),'min_size');
35}
36sub TEST_NAME : Test {
37        my $self = shift;
38        my $spline = $self->{spline};
39        cmp_ok('linear', 'eq' , gsl_spline_name($spline));
40}
41sub TEST_ALLOC : Tests {
42    isa_ok(gsl_spline_alloc($_,100), 'Math::GSL::Spline') for (
43               $gsl_interp_linear,
44               $gsl_interp_polynomial,
45               $gsl_interp_cspline,
46               $gsl_interp_cspline_periodic,
47               $gsl_interp_akima,
48               $gsl_interp_akima_periodic);
49}
50
51sub MULTIPLE_TESTS : Tests {
52  my $a = gsl_interp_accel_alloc ();
53  my $spline = gsl_spline_alloc ($gsl_interp_polynomial, 4);
54  my $data_x = [ 0.0, 1.0, 2.0, 3.0 ];
55  my $data_y = [ 0.0, 1.0, 2.0, 3.0 ];
56  ok_status(gsl_spline_init($spline, $data_x, $data_y, 4), $GSL_SUCCESS);
57  my $test_x = [ 0.0, 0.5, 1.0, 1.5, 2.5, 3.0 ];
58  my $test_y = [ 0.0, 0.5, 1.0, 1.5, 2.5, 3.0 ];
59  my $test_dy = [ 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 ];
60  my $test_iy = [ 0.0, 0.125, 0.5, 9.0/8.0, 25.0/8.0, 9.0/2.0 ];
61
62  for my $i (0.. 3) {
63    my $x = $test_x->[$i];
64    my ($s1, $y) = gsl_spline_eval_e ($spline,$x, $a);
65    my ($s2, $deriv) = gsl_spline_eval_deriv_e ($spline, $x, $a);
66    my ($s3, $integ) = gsl_spline_eval_integ_e ($spline, $test_x->[0], $x, $a);
67
68    ok_status($s1);
69    ok_status($s2);
70    ok_status($s3);
71
72     ok_similar([$y, $deriv, $integ], [$test_y->[$i], $test_dy->[$i], $test_iy->[$i]], "eval_e, derive_e and integ_e",1e-10);
73
74     my $diff_y = $y - $test_y->[$i];
75     my $diff_deriv = $deriv - $test_dy->[$i];
76     my $diff_integ = $integ - $test_iy->[$i];
77     ok( abs($diff_y) < 1e-10, "diff_y");
78     ok( abs($diff_deriv) < 1e-10, "diff_deriv");
79     ok( abs($diff_integ) < 1e-10, "diff_integ");
80    }
81  gsl_interp_accel_free ($a);
82  gsl_spline_free ($spline);
83}
84
85Test::Class->runtests;
86