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package Math::GSL::FFT::Test;
use base q{Test::Class};
use Test::Most;
use Math::GSL::Test qw/:all/;
use Math::GSL::FFT qw/:all/;
use Math::GSL qw/:all/;
use Math::GSL::Errno qw/:all/;
use Data::Dumper;
use strict;
use warnings;
BEGIN { gsl_set_error_handler_off() }
sub make_fixture : Test(setup) {
}
sub teardown : Test(teardown) {
unlink 'fft' if -f 'fft';
}
sub FFT_REAL_TRANSFORM : Tests
{
my $input = [ (4242) x 100 ];
my $N = @$input;
local $TODO = "https://github.com/leto/math--gsl/issues/132";
return;
my $workspace1 = gsl_fft_real_workspace_alloc($N);
isa_ok($workspace1, 'Math::GSL::FFT');
my $wavetable1 = gsl_fft_real_wavetable_alloc($N);
isa_ok($wavetable1, 'Math::GSL::FFT');
my ($status, $output ) = gsl_fft_real_transform ($input, 1, $N, $wavetable1, $workspace1);
ok_status($status, $GSL_SUCCESS, 'gsl_fft_real_transform');
my $workspace2 = gsl_fft_real_workspace_alloc($N);
isa_ok($workspace2, 'Math::GSL::FFT');
my $wavetable2 = gsl_fft_halfcomplex_wavetable_alloc($N);
isa_ok($wavetable2, 'Math::GSL::FFT');
my ($status2, $output2) = gsl_fft_halfcomplex_backward($output, 1, $N, $wavetable2, $workspace2);
ok_status($status2, $GSL_SUCCESS, 'gsl_fft_halfcomplex_backward');
# F = F^(-1)/$N on real inputs
ok_similar( $input, [ map { $_ / $N } @$output2 ] );
my $wavetable3 = gsl_fft_halfcomplex_wavetable_alloc($N);
my $workspace3 = gsl_fft_real_workspace_alloc($N);
my ($status3, $output3) = gsl_fft_halfcomplex_inverse($output, 1, $N, $wavetable3, $workspace3);
ok_status($status3, $GSL_SUCCESS, 'gsl_fft_halfcomplex_inverse');
# F = F^(-1) on real inputs
ok_similar( $input, $output3 );
}
sub FFT_HALFCOMPLEX_UNPACK : Tests
{
my $input = [ 0 .. 7 ];
my $N = @$input;
#TODO: this core dumps still
#my ($status, $output ) = gsl_fft_halfcomplex_unpack($input, 1, $N / 2);
#warn Dumper [ $output ];
#ok_status($status);
}
sub FFT_REAL_UNPACK : Tests
{
my $input = [ 0 .. 7 ];
my $N = @$input;
#TODO: this core dumps still
#my ($status, $output ) = gsl_fft_real_unpack($input, 1, $N);
#ok_status($status);
#warn Dumper [ $output ];
}
sub FFT_REAL_RADIX2_TRANSFORM_STRIDE : Tests
{
my $input = [ 0 .. 7 ];
my $N = @$input;
my $stride = 2;
local $TODO = "coredumps :(";
return;
my ($status, $output ) = gsl_fft_real_radix2_transform ($input, $stride, $N / 2);
ok_status($status);
ok( @$output == $N/2 );
my ($status2, $output2) = gsl_fft_halfcomplex_radix2_inverse($output, $stride, $N/2);
ok( @$output2 == $N/2 );
ok_status($status2);
}
sub FFT_REAL_RADIX2_TRANSFORM : Tests
{
my $input = [ 0 .. 7 ];
my $N = @$input;
local $TODO = "coredumps :(";
return;
my ($status, $output ) = gsl_fft_real_radix2_transform ($input, 1, $N);
ok_status($status);
my ($status2, $output2) = gsl_fft_halfcomplex_radix2_backward($output, 1, $N);
ok_status($status2);
# F = F^(-1) / N on real inputs
ok_similar( $input, [ map { $_ / $N } @$output2 ] );
my ($status3, $output3) = gsl_fft_halfcomplex_radix2_inverse($output, 1, $N);
ok_status($status3);
# F = F^(-1) on real inputs
ok_similar( $input, $output3 );
# TODO
#my ($status4,$output4) = gsl_fft_halfcomplex_radix2_unpack($output, 1, $N);
#ok_status($status4);
}
sub FFT_COMPLEX_RADIX2_DIF_FORWARD : Tests
{
my $data = [ 0 .. 7 ];
my $N = @$data;
my $stride = 1;
local $TODO = "https://github.com/leto/math--gsl/issues/131";
#my ($status1, $output1) = gsl_fft_complex_radix2_dif_forward ($data, $stride, $N/2);
#ok_status($status1);
#ok( @$output1 == $N/2 );
#
#my ($status2, $output2) = gsl_fft_complex_radix2_dif_backward ($output1, $stride, $N/2);
#ok_status($status2);
#ok( @$output2 == $N/2 );
}
sub FFT_COMPLEX_RADIX2_FORWARD : Tests
{
my $data = [ 0 .. 7 ];
my $N = @$data;
local $TODO = "FFT tests are messed up";
return;
my ($status1, $output1) = gsl_fft_complex_radix2_forward ($data, 1, $N / 2);
ok_status($status1);
ok( @$output1 == $N / 2 );
# this seems to non-deterministically fail OR cause a core dump
#my ($status2, $output2) = gsl_fft_complex_radix2_inverse($output1, 1, $N / 2);
#ok_status($status2);
#warn Dumper [ $data, $output1, $output2 ];
#ok_similar($data, $output2);
}
sub FFT_VARS : Tests {
cmp_ok( $gsl_fft_forward, '==', -1, 'gsl_fft_forward' );
cmp_ok( $gsl_fft_backward, '==', +1, 'gsl_fft_backward' );
}
sub WAVETABLE_ALLOC_FREE: Tests {
my $wavetable = gsl_fft_complex_wavetable_alloc(42);
isa_ok($wavetable, 'Math::GSL::FFT' );
gsl_fft_complex_wavetable_free($wavetable);
ok(!$@, 'gsl_fft_complex_wavetable_free');
$wavetable = gsl_fft_halfcomplex_wavetable_alloc(42);
isa_ok($wavetable, 'Math::GSL::FFT' );
gsl_fft_halfcomplex_wavetable_free($wavetable);
ok(!$@, 'gsl_fft_halfcomplex_wavetable_free');
$wavetable = gsl_fft_real_wavetable_alloc(42);
isa_ok($wavetable, 'Math::GSL::FFT' );
gsl_fft_real_wavetable_free($wavetable);
ok(!$@, 'gsl_fft_real_wavetable_free');
}
sub WORKSPACE_ALLOC_FREE: Tests {
my $workspace = gsl_fft_complex_workspace_alloc(42);
isa_ok($workspace, 'Math::GSL::FFT' );
gsl_fft_complex_workspace_free($workspace);
ok(!$@, 'gsl_fft_complex_workspace_free');
# there are no gsl_fft_halfcomplex_workspace_* functions
$workspace = gsl_fft_real_workspace_alloc(42);
isa_ok($workspace, 'Math::GSL::FFT' );
gsl_fft_real_workspace_free($workspace);
ok(!$@, 'gsl_fft_real_workspace_free');
}
Test::Class->runtests;
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