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Vector.t
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Vector.t
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package Math::GSL::Vector::Test;
use base q{Test::Class};
use Test::More tests => 136;
use Math::GSL qw/:all/;
use Math::GSL::Test qw/:all/;
use Math::GSL::Errno qw/:all/;
use Math::GSL::Vector qw/:all/;
use Test::Exception;
use Data::Dumper;
use strict;
BEGIN{ gsl_set_error_handler_off(); }
sub make_fixture : Test(setup) {
my $self = shift;
$self->{vector} = gsl_vector_alloc(5);
$self->{object} = Math::GSL::Vector->new([1 .. 5 ]);
}
sub teardown : Test(teardown) {
unlink 'vector' if -f 'vector';
}
sub GSL_VECTOR_RAW : Tests {
my $vec = Math::GSL::Vector->new(10);
isa_ok($vec->raw, 'Math::GSL::Vector::gsl_vector');
}
sub GSL_VECTOR_ALLOC : Tests {
my $vector = gsl_vector_alloc(5);
isa_ok($vector, 'Math::GSL::Vector');
}
sub GSL_VECTOR_LENGTH: Tests {
my $self = shift;
my $vector = $self->{object};
ok( $vector->length == 5, '$vector->length' );
}
sub GSL_VECTOR_SET_GET: Tests {
my $self = shift;
gsl_vector_set($self->{vector}, 0, 42 );
my $elem = gsl_vector_get($self->{vector}, 0);
ok( $elem == 42, 'gsl_vector_set/gsl_vector_get' );
}
sub GSL_VECTOR_ISNONNEG: Tests {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, -1 ) } (0..4);
ok( !gsl_vector_isnonneg($self->{vector}),'gsl_vector_isnonneg' );
map { gsl_vector_set($self->{vector}, $_, 1 ) } (0..4);
ok( gsl_vector_isnonneg($self->{vector}),'gsl_vector_isnonneg' );
}
sub GSL_VECTOR_ISNULL: Tests(2) {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, 0 ) } (0..4);
ok( gsl_vector_isnull($self->{vector}),'null vector returns true' );
gsl_vector_set($self->{vector}, 0, 5 );
ok( !gsl_vector_isnull($self->{vector}), 'changed non-null vector returns false' );
}
sub GSL_VECTOR_ISPOS: Tests {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, -1 ) } (0..4);
ok( !gsl_vector_ispos($self->{vector}),'gsl_vector_pos' );
map { gsl_vector_set($self->{vector}, $_, 1 ) } (0..4);
ok( gsl_vector_ispos($self->{vector}),'gsl_vector_pos' );
}
sub GSL_VECTOR_ISNEG: Tests {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, -$_ ) } (0..4);
ok( !gsl_vector_isneg($self->{vector}),'gsl_vector_neg' );
gsl_vector_set($self->{vector}, 0, -1 );
ok( gsl_vector_isneg($self->{vector}),'gsl_vector_neg' );
}
sub GSL_VECTOR_NEW: Tests {
my $vec = Math::GSL::Vector->new( [ map { $_ ** 2 } (1..10) ] );
isa_ok( $vec, 'Math::GSL::Vector', 'Math::GSL::Vector->new($values)' );
dies_ok( sub { Math::GSL::Vector->new(-1) }, 'new takes only positive indices');
dies_ok( sub { Math::GSL::Vector->new(3.14) }, 'new takes only integer indices');
dies_ok( sub { Math::GSL::Vector->new([]) },'new takes only nonempty array refs');
$vec = Math::GSL::Vector->new(42);
ok( $vec->length == 42 , 'new creates empty vectors of a given length');
}
sub GSL_VECTOR_AS_LIST: Tests {
my $vec = Math::GSL::Vector->new( [ map { $_ ** 2 } (reverse 1..10) ] );
my @x = $vec->as_list;
is_deeply( \@x, [map { $_ ** 2 } (reverse 1..10)] );
}
sub GSL_VECTOR_SET: Tests {
my $vec = Math::GSL::Vector->new( [ map { $_ ** 2 } (1..10) ] );
$vec->set( [ 0..4] , [ reverse 1..5 ] );
my ($x) = $vec->get([0]);
ok( $x == 5, "gsl_vector_set: $x ?= 5" );
}
sub GSL_VECTOR_MIN: Tests {
my $vec = Math::GSL::Vector->new( [ map { $_ ** 2 } (0..4) ] );
ok_similar( $vec->min ,0, '$vec->min' );
ok_similar( gsl_vector_min($vec->raw) ,0, 'gsl_vector_min' );
}
sub GSL_VECTOR_MAX: Tests {
my $vec = Math::GSL::Vector->new( [ 3, 567, 4200 ]);
ok_similar( $vec->max ,4200, '$vec->min' );
ok_similar( gsl_vector_max($vec->raw) ,4200, 'gsl_vector_max' );
}
sub GSL_VECTOR_FREAD_FWRITE: Tests {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, $_ ** 2 ) } (0..4); ;
my $fh = gsl_fopen("vector", 'w');
my $status = gsl_vector_fwrite($fh, $self->{vector} );
ok( ! $status, 'gsl_vector_fwrite' );
ok( -f "vector", 'gsl_vector_fwrite' );
ok_status(fclose($fh));
map { gsl_vector_set($self->{vector}, $_, $_ ** 3 ) } (0..4);
$fh = gsl_fopen("vector", 'r');
ok_status(gsl_vector_fread($fh, $self->{vector} ));
is_deeply( [ map { gsl_vector_get($self->{vector}, $_) } (0..4) ],
[ map { $_ ** 2 } (0..4) ],
);
ok_status(gsl_fclose($fh));
}
sub GSL_VECTOR_SUBVECTOR : Tests {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, $_ ** 2 ) } (0..4); ;
my $vec_sub = gsl_vector_subvector($self->{vector}, 2, 3);
ok_similar( [ map { gsl_vector_get($vec_sub->{vector}, $_) } (0..2) ],
[ 4, 9, 16 ],
);
}
sub GSL_VECTOR_CALLOC : Tests {
my $vector = gsl_vector_calloc(5);
isa_ok($vector, 'Math::GSL::Vector');
}
sub GSL_VECTOR_SET_ALL : Tests {
my $vec = Math::GSL::Vector->new(5);
gsl_vector_set_all($vec->raw, 4);
ok_similar( [ $vec->as_list ], [ (4) x 5 ] );
}
sub GSL_VECTOR_SET_ZERO : Tests {
my $self = shift;
gsl_vector_set_zero($self->{vector});
map { is(gsl_vector_get($self->{vector} , $_ ), 0) } (0..4);
}
sub GSL_VECTOR_SET_BASIS : Tests {
my $self = shift;
ok_status(gsl_vector_set_basis($self->{vector}, 0));
is (gsl_vector_get($self->{vector} , 0 ), 1);
map { is(gsl_vector_get($self->{vector} , $_ ), 0) } (1..4);
}
sub GSL_VECTOR_SUBVECTOR_WITH_STRIDE : Tests {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, $_ ** 2 ) } (0..4); ;
my $sub_stride = gsl_vector_subvector_with_stride($self->{vector}, 0, 2, 3);
is(gsl_vector_get($sub_stride->{vector} , 0 ), 0, "first element");
is(gsl_vector_get($sub_stride->{vector} , 1 ), 4, "second element");
is(gsl_vector_get($sub_stride->{vector} , 2 ), 16, "third element");
}
sub GSL_VECTOR_MAX_INDEX : Tests {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, $_ ** 2 ) } (0..4); ;
my $index = gsl_vector_max_index($self->{vector});
is($index, 4, "Position of the maximum");
}
sub GSL_VECTOR_MIN_INDEX : Tests {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, $_ ** 2 ) } (0..4); ;
my $index = gsl_vector_min_index($self->{vector});
is($index, 0, "Position of the minimum");
}
sub GSL_VECTOR_MINMAX_INDEX : Tests {
my $self = shift;
my ($min, $max);
map { gsl_vector_set($self->{vector}, $_, $_ ** 2 ) } (0..4);
($min, $max) = gsl_vector_minmax_index($self->{vector});
ok_similar( [ 0, 4 ], [ $min, $max], 'gsl_vector_minmax_index' );
}
sub GSL_VECTOR_MINMAX : Tests {
my ($min, $max);
my $vector = gsl_vector_alloc(5);
map { gsl_vector_set($vector, $_, $_ ** 2 ) } (0..4);
($min, $max) = gsl_vector_minmax($vector);
ok_similar( [ 0, 16 ], [ $min, $max], 'gsl_vector_minmax' );
}
sub GSL_VECTOR_MEMCPY : Tests {
my $self = shift;
my $copy = gsl_vector_alloc(5);
map { gsl_vector_set($self->{vector}, $_, $_ ** 2 ) } (0..4); ;
ok_status( gsl_vector_memcpy($copy, $self->{vector}) );
map { is(gsl_vector_get($copy, $_), $_ ** 2 ) } (0..4); ;
}
sub GSL_VECTOR_VIEW_ARRAY : Tests {
local $TODO = "memory management for view_array* functions is being worked on";
my @array = [1,2,3,4,5,6];
my $vec_view = gsl_vector_view_array(@array, 2);
map { is(gsl_vector_get($vec_view->{vector}, $_), $_+1 ) } (0..1); ;
}
sub GSL_VECTOR_REVERSE : Tests {
my $self = shift;
map { gsl_vector_set($self->{vector}, $_, $_ ** 2 ) } (0..4); ;
ok_status( gsl_vector_reverse($self->{vector}));
ok_similar( [ 16, 9, 4, 1, 0], [ map { gsl_vector_get($self->{vector}, $_) } 0..4 ] );
}
sub GSL_VECTOR_SWAP_ELEMENTS : Tests {
my $v1 = Math::GSL::Vector->new( [ map { $_ ** 2 } (0 .. 4) ] );
ok_status( gsl_vector_swap_elements($v1->raw, 0, 4));
is(gsl_vector_get($v1->raw, 0), 16);
is(gsl_vector_get($v1->raw, 4), 0);
is_deeply( [ 16, 1, 4, 9, 0 ], [ $v1->as_list ] );
}
sub GSL_VECTOR_ADD : Tests {
my $v1 = Math::GSL::Vector->new([0 .. 4]);
my $v2 = $v1->copy;
ok_status( gsl_vector_reverse($v2->raw) );
ok_status( gsl_vector_add($v1->raw, $v2->raw) );
is_deeply( [ $v1->as_list ], [ (4) x 5 ] );
}
sub GSL_VECTOR_SUB : Tests {
my $self = shift;
my $second_vec = gsl_vector_alloc(5);
map { gsl_vector_set($self->{vector}, $_, $_ ) } (0..4); ;
map { gsl_vector_set($second_vec, $_, 1) } (0..4); ;
ok_status( gsl_vector_sub($self->{vector}, $second_vec));
map { is(gsl_vector_get($self->{vector}, $_), $_ - 1 ) } (0..4); ;
}
sub GSL_VECTOR_MUL : Tests {
my $self = shift;
my $second_vec = gsl_vector_alloc(5);
map { gsl_vector_set($self->{vector}, $_, $_ ) } (0..4); ;
map { gsl_vector_set($second_vec, $_, 2) } (0..4); ;
ok_status( gsl_vector_mul($self->{vector}, $second_vec));
map { is(gsl_vector_get($self->{vector}, $_), $_ * 2 ) } (0..4); ;
}
sub GSL_VECTOR_DIV : Tests {
my $self = shift;
my $second_vec = gsl_vector_alloc(5);
map { gsl_vector_set($self->{vector}, $_, $_*2 ) } (0..4); ;
map { gsl_vector_set($second_vec, $_, 2) } (0..4); ;
ok_status( gsl_vector_div($self->{vector}, $second_vec));
map { is(gsl_vector_get($self->{vector}, $_), $_ ) } (0..4); ;
}
sub GSL_VECTOR_SCALE : Tests {
my $v = Math::GSL::Vector->new([0..4]);
ok_status(gsl_vector_scale($v->raw, 2));
ok_similar( [ $v->as_list ], [ 0,2,4,6,8 ] );
}
sub GSL_VECTOR_SCALE_OVERLOAD : Tests {
my $v = Math::GSL::Vector->new([0..4]);
my $expected = [ map { $_*5} (0..4) ];
$v = 5 * $v;
ok_similar( [ $v->as_list ], $expected );
my $w = Math::GSL::Vector->new([0..4]);
$w = $w * 5;
ok_similar( [ $w->as_list ], $expected );
}
sub GSL_VECTOR_DOT_PRODUCT : Tests {
my $v = Math::GSL::Vector->new([0..4]);
my $w = Math::GSL::Vector->new([0..4]);
ok_similar( $v * $w , 4*4 + 3*3 + 2*2 + 1*1, 'basic dot product');
my $z = Math::GSL::Vector->new([0..10]);
dies_ok( sub { $z * $v; }, 'dot_product checks vector length' );
my $q = Math::GSL::Vector->new(5);
ok_similar ( $q * $q, 0, 'newly created vectors are zero-filled');
}
sub GSL_VECTOR_SWAP : Tests {
my @idx = (0..(5+int rand(5)));
my $vec1 = gsl_vector_alloc($#idx+1);
my $vec2 = gsl_vector_alloc($#idx+1);
map { gsl_vector_set($vec1, $_, $_**2 ) } @idx;
map { gsl_vector_set($vec2, $_, $_) } @idx;
ok_status( gsl_vector_swap($vec1, $vec2));
ok_similar( [ map { gsl_vector_get($vec1, $_) } @idx ],
[ @idx ],
);
ok_similar( [ map { gsl_vector_get($vec2, $_) } @idx ],
[ map { $_**2 } @idx ],
);
}
sub GSL_VECTOR_FPRINTF_FSCANF : Tests {
my $vec1 = Math::GSL::Vector->new([ map { $_ ** 2 } (0..4) ]);
my $fh = gsl_fopen("vector", 'w');
ok( defined $fh, 'fopen - write');
ok_status(gsl_vector_fprintf($fh, $vec1->raw, "%f"));
ok_status(gsl_fclose($fh));
my $vec2 = Math::GSL::Vector->new([ map { $_ ** 3 } (0..4) ]);
$fh = gsl_fopen("vector", 'r');
ok( defined $fh, 'fopen - readonly');
ok_status(gsl_vector_fscanf($fh, $vec2->raw));
ok_similar( [ $vec2->as_list ], [ map { $_ ** 2 } (0..4) ]);
ok_status(gsl_fclose($fh) );
}
sub GSL_ADDITION : Tests {
my $vec1 = Math::GSL::Vector->new([1,2,3]);
my $vec2 = Math::GSL::Vector->new([2,3,4]);
my $vec3 = $vec1 + $vec2;
ok_similar([$vec3->as_list], [3,5,7]);
my $vec4 = $vec2 + 5;
ok_similar([$vec4->as_list], [7,8,9]);
my $vec5 = 5 + $vec2;
ok_similar([$vec5->as_list], [7,8,9]);
my $z = Math::GSL::Vector->new([0..10]);
dies_ok( sub { $z + $vec1; }, 'addition checks vector length' );
ok_similar([$vec1->as_list], [1,2,3]);
}
sub COPY : Tests {
my $v1 = Math::GSL::Vector->new( [ 55 .. 65 ] );
isa_ok( $v1->copy, 'Math::GSL::Vector' );
ok_similar( [ $v1->copy->as_list ], [ $v1->as_list ] );
}
sub GSL_SUBTRACTION : Tests(3) {
my $v1 = Math::GSL::Vector->new( [ 1 .. 5 ]);
my $v2 = Math::GSL::Vector->new( [ 5 .. 9 ]);
ok_similar( [($v2-$v1)->as_list], [ (4) x 5 ] );
my $v3 = $v2 - 3;
ok_similar( [ $v3->as_list ], [ 2 .. 6 ] );
my $v4 = 4 - $v3;
ok_similar( [ $v4->as_list ], [ 2, 1, 0, -1, -2 ] );
}
sub GSL_MULTIPLICATION : Tests(6) {
my $v = Math::GSL::Vector->new([1,2,3]);
my $v2 = $v * 5;
# check that original is not modified each time
ok_similar ( [$v2->as_list], [5,10,15]);
ok_similar ( [$v->as_list], [1,2,3]);
my $v3 = 5 * $v;
ok_similar ( [$v3->as_list], [5,10,15]);
ok_similar ( [$v->as_list], [1,2,3]);
my $w = $v3 * 0;
ok_similar( [ $w->as_list ], [0,0,0], 'right overloaded zero-ify' );
my $z = 0 * $v3;
ok_similar( [ $w->as_list ], [0,0,0], 'left overloaded zero-ify' );
}
sub GSL_VECTOR_SWAP_OBJECTS : Tests(3) {
my $v = Math::GSL::Vector->new([1,2,3]);
my $w = Math::GSL::Vector->new([42,69,18]);
isa_ok( $v->swap($w), 'Math::GSL::Vector' );
ok_similar( [ $v->as_list ], [ 42, 69, 18 ] );
ok_similar( [ $w->as_list ], [ 1, 2, 3 ] );
}
sub GSL_VECTOR_REVERSE_OBJECTS : Tests(4) {
my @elements = map { int(rand(100)) } (1..10);
my $v = Math::GSL::Vector->new([@elements]);
ok_similar( [ $v->reverse->as_list ], [ reverse @elements ] );
isa_ok($v->reverse, 'Math::GSL::Vector');
ok_similar( [ $v->as_list ], [ @elements ] );
ok_similar( [ $v->reverse->reverse->as_list ], [ $v->as_list ] );
}
sub GSL_VECTOR_NORM : Tests(5) {
my $v = Math::GSL::Vector->new([ (0) x 5 ]);
ok_similar( $v->norm, 0 , 'zero vector norm = 0' );
isa_ok( $v->normalize, 'Math::GSL::Vector');
my $w = Math::GSL::Vector->new([1,2,3]);
my $z = Math::GSL::Vector->new([1,2,-3]);
ok_similar( [ $w->norm ], [ sqrt(14) ], '2-norm' );
ok_similar( [ $w->norm(1) ], [ 6 ], '1-norm' );
ok_similar( [ $z->norm(1) ], [ 6 ], '1-norm with neg. elems.' );
}
sub GSL_VECTOR_NORMALIZE : Tests(4) {
my $w = Math::GSL::Vector->new([1,2,3]);
isa_ok( $w->normalize, 'Math::GSL::Vector');
ok_similar( $w->norm , 1, 'normalize default p=2');
my $v = Math::GSL::Vector->new([1,2,3]);
isa_ok( $v->normalize(3), 'Math::GSL::Vector' );
ok_similar ( $v->norm(3), 1, 'normalize p=3');
}
sub GSL_VECTOR_NORM_OVERLOAD: Tests(2) {
my $v = Math::GSL::Vector->new([1,2,3]);
my $w = Math::GSL::Vector->new([10,0,1]);
ok_similar( [ $v->norm ], [ abs $v ], 'abs overload');
ok_similar( [ abs $w ], [ sqrt(101) ], 'abs = norm' )
}
Test::Class->runtests;