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test: reference test for encoding size

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Simon Cruanes 2025-10-30 22:05:08 -04:00
parent ee8542ea0e
commit 6e8877f177
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3 changed files with 25 additions and 2 deletions
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4
tests/core/dune
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(tests
(names test_trace_context)
(names test_trace_context t_size)
(package opentelemetry)
(libraries opentelemetry))
(libraries opentelemetry opentelemetry.client))

1
tests/core/t_size.expected Normal file
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metrics size: 492B

22
tests/core/t_size.ml Normal file
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(* test the size of serialized data *)
open Opentelemetry
let m =
Metrics.make_resource_metrics
[
Metrics.sum ~name:"sum.foo"
[
Metrics.int ~start_time_unix_nano:42L ~now:45L 10;
Metrics.int ~start_time_unix_nano:52L ~now:55L 20;
];
Metrics.gauge ~name:"gauge.bar"
[
Metrics.float ~start_time_unix_nano:42L ~now:45L 10.;
Metrics.float ~start_time_unix_nano:52L ~now:55L 20.;
];
]
let () =
let str = Opentelemetry_client.Signal.Encode.metrics [ m; m ] in
Printf.printf "metrics size: %dB\n" (String.length str)