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|
#!/usr/bin/perl
use v5.14;
use warnings;
use Test2::V0;
use Net::Prometheus::Gauge;
sub HASHfromSample
{
my ( $sample ) = @_;
return { map { $_, $sample->$_ } qw( varname labels value ) };
}
# No labels
{
my $gauge = Net::Prometheus::Gauge->new(
name => "test_gauge",
help => "A testing gauge",
);
ok( defined $gauge, 'defined $gauge' );
my @samples = $gauge->samples;
is( scalar @samples, 1, '$gauge->samples yields 1 sample' );
is( HASHfromSample( $samples[0] ),
{ varname => "test_gauge", labels => [], value => 0, },
'$samples[0] initially'
);
$gauge->inc;
@samples = $gauge->samples;
is( $samples[0]->value, 1, 'sample->value after $gauge->inc' );
$gauge->inc( 10 );
@samples = $gauge->samples;
is( $samples[0]->value, 11, 'sample->value after $gauge->inc( 10 )' );
$gauge->dec( 5 );
@samples = $gauge->samples;
is( $samples[0]->value, 6, 'sample->value after $gauge->dec( 5 )' );
$gauge->set( undef );
@samples = $gauge->samples;
is( $samples[0]->value, undef, 'sample->value after $gauge->set( undef )' );
}
# Functions
{
my $gauge = Net::Prometheus::Gauge->new(
name => "func_gauge",
help => "A gauge reporting a function",
);
my $value;
$gauge->set_function( sub { $value } );
$value = 10;
is( ( $gauge->samples )[0]->value, 10, 'sample->value from function' );
$value = 20;
is( ( $gauge->samples )[0]->value, 20, 'sample->value updates' );
}
# One label
{
my $gauge = Net::Prometheus::Gauge->new(
name => "labeled_gauge",
help => "A gauge with a label",
labels => [qw( lab )],
);
is( [ $gauge->samples ], [],
'$gauge->samples initially empty'
);
$gauge->set( one => 1 );
$gauge->set( { lab => "two" }, 2 );
# FRAGILE: depends on the current implementation sorting these
my @samples = $gauge->samples;
is( scalar @samples, 2, '$gauge->samples yields 2 samples' );
is( [ map { HASHfromSample( $_ ) } @samples ],
[
{ varname => "labeled_gauge", labels => [ lab => "one" ], value => 1 },
{ varname => "labeled_gauge", labels => [ lab => "two" ], value => 2 },
],
'@samples'
);
$gauge->labels( "three" )->set( 3 );
is( [ map { HASHfromSample( $_ ) } $gauge->samples ],
[
{ varname => "labeled_gauge", labels => [ lab => "one" ], value => 1 },
{ varname => "labeled_gauge", labels => [ lab => "three" ], value => 3 },
{ varname => "labeled_gauge", labels => [ lab => "two" ], value => 2 },
],
'@samples after adding "three"'
);
}
# Functions + label
{
my $gauge = Net::Prometheus::Gauge->new(
name => "labeled_func_gauge",
help => "A gauge reporting a function with a label",
labels => [qw( lab )],
);
my $value;
$gauge->set_function( one => sub { $value } );
$value = 50;
is( ( $gauge->samples )[0]->value, 50, 'sample->value from function with label' );
}
# Two labels
{
my $gauge = Net::Prometheus::Gauge->new(
name => "multidimensional_gauge",
help => "A gauge with two labels",
labels => [qw( x y )],
);
$gauge->set( 0 => 0 => 10 );
$gauge->set( 0 => 1 => 20 );
$gauge->set( { x => 1, y => 0 }, 30 );
$gauge->set( { x => 1, y => 1 }, 40 );
is( [ map { HASHfromSample( $_ ) } $gauge->samples ],
[
{ varname => "multidimensional_gauge", labels => [ x => "0", y => "0" ],
value => 10 },
{ varname => "multidimensional_gauge", labels => [ x => "0", y => "1" ],
value => 20 },
{ varname => "multidimensional_gauge", labels => [ x => "1", y => "0" ],
value => 30 },
{ varname => "multidimensional_gauge", labels => [ x => "1", y => "1" ],
value => 40 },
],
'@samples after adding "three"'
);
}
# Remove and clear
{
my $gauge = Net::Prometheus::Gauge->new(
name => "removal_test",
help => "A gauge for testing removal",
labels => [qw( x )],
);
$gauge->set( { x => "one" }, 1 );
$gauge->set( { x => "two" }, 2 );
$gauge->set( { x => "three" }, 3 );
is( [ map { $_->labels } $gauge->samples ],
# Grr sorting
[ [ x => "one" ], [ x => "three" ], [ x => "two" ] ],
'labels before ->remove' );
$gauge->remove( { x => "one" } );
is( [ map { $_->labels } $gauge->samples ],
[ [ x => "three" ], [ x => "two" ] ],
'labels after ->remove' );
$gauge->clear;
is( [ map { $_->labels } $gauge->samples ],
[],
'labels after ->clear' );
}
done_testing;
|
