1 package Math::GSL::Interp::Test;
2 use base q{Test::Class};
3 use Test::More tests => 35;
4 use Math::GSL qw/:all/;
5 use Math::GSL::Interp qw/:all/;
6 use Math::GSL::Errno qw/:all/;
7 use Math::GSL::Test qw/:all/;
11 sub make_fixture : Test(setup) {
14 sub teardown : Test(teardown) {
17 sub GSL_INTERP_ALLOC : Tests {
18 my $I = gsl_interp_alloc($gsl_interp_linear, 2);
19 isa_ok($I, 'Math::GSL::Interp');
22 sub GSL_INTERP_INIT : Tests {
25 sub GSL_INTERP_BSEARCH : Tests {
26 my $x_array = [ 0.0, 1.0, 2.0, 3.0, 4.0 ];
28 # check an interior point
29 my $index_result = gsl_interp_bsearch($x_array, 1.5, 0, 4);
32 # check that we get the last interval if x == last value
33 $index_result = gsl_interp_bsearch($x_array, 4.0, 0, 4);
36 # check that we get the first interval if x == first value
37 $index_result = gsl_interp_bsearch($x_array, 0.0, 0, 4);
40 # check that we get correct interior boundary behaviour
41 $index_result = gsl_interp_bsearch($x_array, 2.0, 0, 4);
44 # check out of bounds above
45 $index_result = gsl_interp_bsearch($x_array, 10.0, 0, 4);
48 # check out of bounds below
49 $index_result = gsl_interp_bsearch($x_array, -10.0, 0, 4);
53 sub MULTIPLE_TESTS : Tests {
54 my $a = gsl_interp_accel_alloc ();
55 my $interp = gsl_interp_alloc ($gsl_interp_polynomial, 4);
56 my $data_x = [ 0.0, 1.0, 2.0, 3.0 ];
57 my $data_y = [ 0.0, 1.0, 2.0, 3.0 ];
58 my $test_x = [ 0.0, 0.5, 1.0, 1.5, 2.5, 3.0 ];
59 my $test_y = [ 0.0, 0.5, 1.0, 1.5, 2.5, 3.0 ];
60 my $test_dy = [ 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 ];
61 my $test_iy = [ 0.0, 0.125, 0.5, 9.0/8.0, 25.0/8.0, 9.0/2.0 ];
63 gsl_interp_init ($interp, $data_x, $data_y, 4);
65 my $x = $test_x->[$i];
66 my ($s1, $y) = gsl_interp_eval_e ($interp, $data_x, $data_y, $x, $a);
67 my ($s2, $deriv) = gsl_interp_eval_deriv_e ($interp, $data_x, $data_y, $x, $a);
68 my ($s3, $integ) = gsl_interp_eval_integ_e ($interp, $data_x, $data_y, $test_x->[0], $x, $a);
74 ok_similar([$y, $deriv, $integ], [$test_y->[$i], $test_dy->[$i], $test_iy->[$i]], "eval_e, derive_e and integ_e",1e-10);
76 my $diff_y = $y - $test_y->[$i];
77 my $diff_deriv = $deriv - $test_dy->[$i];
78 my $diff_integ = $integ - $test_iy->[$i];
79 ok( abs($diff_y) < 1e-10, "diff_y");
80 ok( abs($diff_deriv) < 1e-10, "diff_deriv");
81 ok( abs($diff_integ) < 1e-10, "diff_integ");
83 gsl_interp_accel_free ($a);
84 gsl_interp_free ($interp);
86 Test::Class->runtests;