use Test::Most;
BEGIN {
    $ENV{OPENTRACING_INTERFACE} = 1 unless exists $ENV{OPENTRACING_INTERFACE};
}
#
# This breaks if it would be set to 0 externally, so, don't do that!!!
use aliased 'OpenTracing::Implementation::DataDog::Agent';
use aliased 'OpenTracing::Implementation::DataDog::Span';
use aliased 'OpenTracing::Implementation::DataDog::SpanContext';
use Types::Standard qw/is_Int/;
my $test_span_context = SpanContext->new(
    service_name    => 'srvc name',
    resource_name   => 'rsrc name',
    baggage_items   => { foo => 1, bar => 2 },
);
my $test_span = Span->new(
    operation_name  => 'oprt name',
    child_of        => $test_span_context,
    context         => $test_span_context,
    start_time      => 52.750,
    tags            => { baz => 3, qux => 4 },
);
$test_span->finish( 83.500 );
my $struct = Agent->to_struct( $test_span );
cmp_deeply(
    $struct => {
        trace_id   => code( sub { is_Int $_[0] } ),
        span_id    => code( sub { is_Int $_[0] } ),
        type       => "custom",
        service    => "srvc name",
        resource   => "rsrc name",
        span_id    => code( sub { is_Int $_[0] } ),
        name       => "oprt name",
        start      => 52750000000, # nano seconds
        duration   => 30750000000, # nano seconds
        meta       => {
            bar        => 2,
            baz        => 3,
            foo        => 1,
            qux        => 4,
        },
    },
    "Extracted the right structure, including DataDog specifics"
);
done_testing();