using System.Net;
using System.Text;
using ScadaLink.CLI;
namespace ScadaLink.CLI.Tests;
///
/// Regression tests for CLI-013 —
/// (success, error-body parsing, connection-failure, and timeout paths) was untested.
/// Uses a stub so no live server is required.
///
public class ManagementHttpClientTests
{
private sealed class StubHandler : HttpMessageHandler
{
private readonly Func> _responder;
public StubHandler(HttpStatusCode status, string body)
: this((_, _) => Task.FromResult(new HttpResponseMessage(status)
{
Content = new StringContent(body, Encoding.UTF8, "application/json"),
}))
{
}
public StubHandler(Func> responder)
{
_responder = responder;
}
protected override Task SendAsync(
HttpRequestMessage request, CancellationToken cancellationToken)
=> _responder(request, cancellationToken);
}
private static ManagementHttpClient ClientWith(StubHandler handler)
=> new(new HttpClient(handler), "http://localhost:9001", "user", "pass");
[Fact]
public async Task SendCommandAsync_Success_ReturnsJsonData()
{
using var client = ClientWith(new StubHandler(HttpStatusCode.OK, "{\"id\":1}"));
var response = await client.SendCommandAsync("ListSites", new { }, TimeSpan.FromSeconds(5));
Assert.Equal(200, response.StatusCode);
Assert.Equal("{\"id\":1}", response.JsonData);
Assert.Null(response.Error);
Assert.Null(response.ErrorCode);
}
[Fact]
public async Task SendCommandAsync_ErrorBody_ParsesErrorAndCode()
{
using var client = ClientWith(new StubHandler(
HttpStatusCode.BadRequest, "{\"error\":\"Bad input\",\"code\":\"INVALID_ARGUMENT\"}"));
var response = await client.SendCommandAsync("ListSites", new { }, TimeSpan.FromSeconds(5));
Assert.Equal(400, response.StatusCode);
Assert.Null(response.JsonData);
Assert.Equal("Bad input", response.Error);
Assert.Equal("INVALID_ARGUMENT", response.ErrorCode);
}
[Fact]
public async Task SendCommandAsync_NonJsonErrorBody_FallsBackToRawBody()
{
using var client = ClientWith(new StubHandler(
HttpStatusCode.BadGateway, "Bad Gateway"));
var response = await client.SendCommandAsync("ListSites", new { }, TimeSpan.FromSeconds(5));
Assert.Equal(502, response.StatusCode);
Assert.Equal("Bad Gateway", response.Error);
Assert.Null(response.ErrorCode);
}
[Fact]
public async Task SendCommandAsync_ConnectionFailure_ReturnsStatusZero()
{
using var client = ClientWith(new StubHandler((_, _) =>
throw new HttpRequestException("connection refused")));
var response = await client.SendCommandAsync("ListSites", new { }, TimeSpan.FromSeconds(5));
Assert.Equal(0, response.StatusCode);
Assert.Equal("CONNECTION_FAILED", response.ErrorCode);
Assert.Contains("connection refused", response.Error);
}
[Fact]
public async Task SendCommandAsync_Timeout_Returns504()
{
using var client = ClientWith(new StubHandler(async (_, ct) =>
{
await Task.Delay(Timeout.Infinite, ct);
return new HttpResponseMessage(HttpStatusCode.OK);
}));
var response = await client.SendCommandAsync("ListSites", new { }, TimeSpan.FromMilliseconds(50));
Assert.Equal(504, response.StatusCode);
Assert.Equal("TIMEOUT", response.ErrorCode);
}
}