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tests: net: prometheus: Make sure formatter works as expected

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Enhance the formatter test to verify that two metrics can be
formatted.

Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
This commit is contained in:
Jukka Rissanen 2024-11-22 10:13:32 +02:00 • committed by Anas Nashif
commit 99abfda5ba
1 changed files with 12 additions and 3 deletions
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15
tests/net/lib/prometheus/formatter/src/main.c
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@ -13,7 +13,9 @@
#define MAX_BUFFER_SIZE 256
PROMETHEUS_COUNTER_DEFINE(test_counter, "Test counter",
({ .key = "test", .value = "counter" }));
({ .key = "test", .value = "counter" }), NULL);
PROMETHEUS_COUNTER_DEFINE(test_counter2, "Test counter 2",
({ .key = "test", .value = "counter" }), NULL);
PROMETHEUS_COLLECTOR_DEFINE(test_custom_collector);
@ -28,11 +30,15 @@ ZTEST(test_formatter, test_prometheus_formatter_simple)
int ret;
char formatted[MAX_BUFFER_SIZE] = { 0 };
struct prometheus_counter *counter;
char exposed[] = "# HELP test_counter Test counter\n"
char exposed[] = "# HELP test_counter2 Test counter 2\n"
"# TYPE test_counter2 counter\n"
"test_counter2{test=\"counter\"} 1\n"
"# HELP test_counter Test counter\n"
"# TYPE test_counter counter\n"
"test_counter{test=\"counter\"} 1\n";
prometheus_collector_register_metric(&test_custom_collector, &test_counter.base);
prometheus_collector_register_metric(&test_custom_collector, &test_counter2.base);
counter = (struct prometheus_counter *)prometheus_collector_get_metric(
&test_custom_collector, "test_counter");
@ -44,13 +50,16 @@ ZTEST(test_formatter, test_prometheus_formatter_simple)
ret = prometheus_counter_inc(&test_counter);
zassert_ok(ret, "Error incrementing counter");
ret = prometheus_counter_inc(&test_counter2);
zassert_ok(ret, "Error incrementing counter 2");
zassert_equal(counter->value, 1, "Counter value is not 1");
ret = prometheus_format_exposition(&test_custom_collector, formatted, sizeof(formatted));
zassert_ok(ret, "Error formatting exposition data");
zassert_equal(strcmp(formatted, exposed), 0,
"Exposition format is not as expected (expected \"%s\", got \"%s\")",
"Exposition format is not as expected (expected\n\"%s\", got\n\"%s\")",
exposed, formatted);
}