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using Agent.App.Logging;
using Agent.Core.Localization;
using Agent.Mcp;
namespace Agent.Core.Tests;
public sealed class ObservabilityTests
{
[Fact]
public void Ready_is_always_visible_even_when_log_threshold_is_fatal()
{
using var directory = new TestDirectory();
LocaleCatalog locale = LocaleCatalog.Load(Path.GetFullPath("config/locales"), "en");
using (var application = new RollingFileLog(directory.Path, 1024 * 1024, 2, "fatal"))
using (var observer = new McpHostLogObserver(application, locale, directory.Path, false, 1024 * 1024, 2))
observer.Ready(new McpReadyInfo("http", "http://127.0.0.1:8080/mcp", 42, "2026-07-28", true, true));
Assert.Contains("Agent is ready", File.ReadAllText(Path.Combine(directory.Path, "application.log")), StringComparison.Ordinal);
}
[Fact]
public void Ready_and_http_request_are_logged_without_sensitive_payloads()
{
using var directory = new TestDirectory();
LocaleCatalog locale = LocaleCatalog.Load(Path.GetFullPath("config/locales"), "en");
using (var application = new RollingFileLog(directory.Path, 1024 * 1024, 2))
{
using var observer = new McpHostLogObserver(application, locale, directory.Path, true, 1024 * 1024, 2);
observer.Ready(new McpReadyInfo("http", "http://127.0.0.1:8080/mcp", 42, "2026-07-28", true, true));
observer.HttpRequestStarted(new McpHttpRequestStartInfo("connection", "trace", "127.0.0.1", 50123, "POST", "/mcp"));
observer.HttpRequest(new McpHttpRequestInfo(DateTimeOffset.UtcNow, "connection", "trace", "127.0.0.1", 50123,
"127.0.0.1", 8080, "POST", "/mcp", 200, 12.5, "application/json", 100, "test-client",
"2026-07-28", "tools/list", "agent_run"));
}
string applicationText = File.ReadAllText(Path.Combine(directory.Path, "application.log"));
Assert.Contains("Agent is ready", applicationText, StringComparison.Ordinal);
Assert.Contains("remote=127.0.0.1:50123", applicationText, StringComparison.Ordinal);
string httpText = File.ReadAllText(Path.Combine(directory.Path, "http.jsonl"));
Assert.Contains("\"method\":\"POST\"", httpText, StringComparison.Ordinal);
Assert.Contains("\"remote_ip\":\"127.0.0.1\"", httpText, StringComparison.Ordinal);
Assert.DoesNotContain("Authorization", httpText, StringComparison.OrdinalIgnoreCase);
Assert.DoesNotContain("Cookie", httpText, StringComparison.OrdinalIgnoreCase);
Assert.DoesNotContain("prompt", httpText, StringComparison.OrdinalIgnoreCase);
}
}
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