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|
#!/usr/bin/perl
use v5.14;
use warnings;
use Test2::V0;
use Net::Prometheus::Histogram;
sub HASHfromSample
{
my ( $sample ) = @_;
return { map { $_, $sample->$_ } qw( varname labels value ) };
}
{
my $histogram = Net::Prometheus::Histogram->new(
name => "test",
help => "A testing histogram",
buckets => [ 1, 2, 5 ],
);
ok( defined $histogram, 'defined $histogram' );
is( [ $histogram->bucket_bounds ],
[ 1, 2, 5 ],
'$histogram->bucket_bounds'
);
is( [ map { HASHfromSample( $_ ) } $histogram->samples ],
[
# Slightly fragile as we depend on 'count' coming before 'sum'
{ varname => "test_count", labels => [], value => 0 },
{ varname => "test_sum", labels => [], value => 0 },
{ varname => "test_bucket", labels => [ le => 1 ], value => 0 },
{ varname => "test_bucket", labels => [ le => 2 ], value => 0 },
{ varname => "test_bucket", labels => [ le => 5 ], value => 0 },
{ varname => "test_bucket", labels => [ le => "+Inf" ], value => 0 },
],
'$histogram->samples initially'
);
$histogram->observe( 5 );
is( [ map { HASHfromSample( $_ ) } $histogram->samples ],
[
{ varname => "test_count", labels => [], value => 1 },
{ varname => "test_sum", labels => [], value => 5 },
{ varname => "test_bucket", labels => [ le => 1 ], value => 0 },
{ varname => "test_bucket", labels => [ le => 2 ], value => 0 },
{ varname => "test_bucket", labels => [ le => 5 ], value => 1 },
{ varname => "test_bucket", labels => [ le => "+Inf" ], value => 1 },
],
'$histogram->samples after ->observe( 5 )'
);
$histogram->observe( 1.5 );
is( [ map { HASHfromSample( $_ ) } $histogram->samples ],
[
{ varname => "test_count", labels => [], value => 2 },
{ varname => "test_sum", labels => [], value => 6.5 },
{ varname => "test_bucket", labels => [ le => 1 ], value => 0 },
{ varname => "test_bucket", labels => [ le => 2 ], value => 1 },
{ varname => "test_bucket", labels => [ le => 5 ], value => 2 },
{ varname => "test_bucket", labels => [ le => "+Inf" ], value => 2 },
],
'$histogram->samples after ->observe( 1.5 )'
);
}
# Remove and clear
{
my $histogram = Net::Prometheus::Histogram->new(
name => "removal_test",
help => "A histogram for testing removal",
labels => [qw( x )],
);
$histogram->observe( { x => "one" }, 1 );
$histogram->observe( { x => "two" }, 2 );
$histogram->observe( { x => "three" }, 3 );
is( [ map { $_->varname =~ m/_count/ ? $_->labels : () } $histogram->samples ],
# Grr sorting
[ [ x => "one" ], [ x => "three" ], [ x => "two" ] ],
'labels before ->remove' );
$histogram->remove( { x => "one" } );
is( [ map { $_->varname =~ m/_count/ ? $_->labels : () } $histogram->samples ],
[ [ x => "three" ], [ x => "two" ] ],
'labels after ->remove' );
$histogram->clear;
is( [ map { $_->varname =~ m/_count/ ? $_->labels : () } $histogram->samples ],
[],
'labels after ->clear' );
}
# exceptions
{
ok( dies {
Net::Prometheus::Histogram->new(
name => "test",
labels => [ "le" ],
help => "",
);
}, 'Histogram with "le" label dies'
);
ok( dies {
Net::Prometheus::Histogram->new(
name => "test",
help => "",
buckets => [ 5, 5 ],
);
}, 'Histogram with non-monotonic buckets dies'
);
}
# Decade buckets
{
my $hist;
# Large
$hist = Net::Prometheus::Histogram->new(
name => "large",
help => "A large value",
bucket_min => 1, bucket_max => 1E6
);
is( [ $hist->bucket_bounds ],
[ 1E0, 1E1, 1E2, 1E3, 1E4, 1E5, 1E6 ],
'buckets for 1 to 1E6' );
# Small
$hist = Net::Prometheus::Histogram->new(
name => "small",
help => "A small value",
bucket_min => 1E-6, bucket_max => 1,
);
is( [ $hist->bucket_bounds ],
[ 1E-6, 1E-5, 1E-4, 1E-3, 1E-2, 1E-1, 1E0 ],
'buckets for 1E-6 to 1' );
}
# Custom buckets
{
# Generate E6 values
my $hist = Net::Prometheus::Histogram->new(
name => "E6",
help => "Engineering E6 series",
bucket_min => 1,
buckets_per_decade => [ 1, 1.5, 2.2, 3.3, 4.7, 6.8 ],
);
is( [ $hist->bucket_bounds ],
[ 1.0, 1.5, 2.2, 3.3, 4.7, 6.8,
10, 15, 22, 33, 47, 68,
100, 150, 220, 330, 470, 680,
1000 ],
'buckets for custom values per decade' );
}
done_testing;
|
