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test: add E2E monitoring endpoint tests (varz, connz, healthz)

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Replace Task.Delay polling with PeriodicTimer in NatsServerProcess readiness
checks and extend StartAsync to also TCP-poll the monitor port when enabled,
so MonitorServerFixture is guaranteed ready before tests run.
This commit is contained in:
Joseph Doherty
2026-03-12 19:10:33 -04:00
parent 4853409a40
commit 8ad2172e3c
3 changed files with 90 additions and 7 deletions
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52
tests/NATS.E2E.Tests/MonitoringTests.cs Normal file
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using System.Text.Json;
using NATS.Client.Core;
using NATS.E2E.Tests.Infrastructure;
namespace NATS.E2E.Tests;
[Collection("E2E-Monitor")]
public class MonitoringTests(MonitorServerFixture fixture)
{
[Fact]
public async Task Varz_ReturnsServerInfo()
{
using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(10));
var response = await fixture.MonitorClient.GetAsync("/varz", cts.Token);
response.StatusCode.ShouldBe(System.Net.HttpStatusCode.OK);
var json = await response.Content.ReadAsStringAsync(cts.Token);
using var doc = JsonDocument.Parse(json);
var root = doc.RootElement;
root.TryGetProperty("server_name", out _).ShouldBeTrue();
root.TryGetProperty("version", out _).ShouldBeTrue();
root.TryGetProperty("max_payload", out _).ShouldBeTrue();
}
[Fact]
public async Task Connz_ReflectsConnectedClients()
{
await using var client = fixture.CreateClient();
await client.ConnectAsync();
await client.PingAsync();
using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(10));
var response = await fixture.MonitorClient.GetAsync("/connz", cts.Token);
response.StatusCode.ShouldBe(System.Net.HttpStatusCode.OK);
var json = await response.Content.ReadAsStringAsync(cts.Token);
using var doc = JsonDocument.Parse(json);
var root = doc.RootElement;
root.TryGetProperty("num_connections", out var numConns).ShouldBeTrue();
numConns.GetInt32().ShouldBeGreaterThanOrEqualTo(1);
}
[Fact]
public async Task Healthz_ReturnsOk()
{
using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(10));
var response = await fixture.MonitorClient.GetAsync("/healthz", cts.Token);
response.StatusCode.ShouldBe(System.Net.HttpStatusCode.OK);
}
}