Why does my RestSharp API test keep running without finishing, even though I receive the correct response?

Problem with continuous test execution

As someone who is just starting out with RestSharp, I’m encountering an unusual issue. My test method retrieves the correct response from a weather API, yet it never seems to complete. While the status code and content appear fine during debugging, the test continues to run indefinitely.

Additionally, I’m unable to successfully deserialize the JSON response to my C# classes. I generated those classes using Visual Studio’s paste special feature to minimize errors.

public async Task RetrieveWeatherData()
{
    var request = new RestRequest(apiUrl, Method.Get);
    RestResponse response = await httpClient.ExecuteAsync(request);

    Console.WriteLine(response.StatusCode);
    if (response.IsSuccessful == true)
        Console.WriteLine("Request was successful!");

    var jsonOutput = response.Content;
    Console.WriteLine(response.Content);
    Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));
    WeatherInfo weatherInfo = JsonConvert.DeserializeObject<WeatherInfo>(jsonOutput);
}

Example of API output:

{"coord":{"lon":13.7329,"lat":46.1828},"weather":[{"id":803,"main":"Clouds","description":"broken clouds","icon":"04d"}],"base":"stations","main":{"temp":298.23,"feels_like":298.13,"temp_min":296.13,"temp_max":301.58,"pressure":1008,"humidity":51},"visibility":10000,"wind":{"speed":2.71,"deg":223,"gust":2.23},"clouds":{"all":62},"dt":1653043444,"sys":{"type":2,"id":19828,"country":"SI","sunrise":1653017233,"sunset":1653071774},"timezone":7200,"id":3189038,"name":"Tolmin","cod":200}

My data classes:

public class WeatherInfo
{
    public Coordinates coord { get; set; }
    public Weather[] weather { get; set; }
    public string _base { get; set; }
    public MainDetails main { get; set; }
    public int visibility { get; set; }
    public WindDetails wind { get; set; }
    public CloudCoverage clouds { get; set; }
    public int dt { get; set; }
    public SystemInfo sys { get; set; }
    public int timezone { get; set; }
    public int id { get; set; }
    public string name { get; set; }
    public int cod { get; set; }
}

public class Coordinates
{
    public float lon { get; set; }
    public float lat { get; set; }
}

public class MainDetails
{
    public float temp { get; set; }
    public float feels_like { get; set; }
    public float temp_min { get; set; }
    public float temp_max { get; set; }
    public int pressure { get; set; }
    public int humidity { get; set; }
}

public class WindDetails
{
    public float speed { get; set; }
    public int deg { get; set; }
    public float gust { get; set; }
}

public class CloudCoverage
{
    public int all { get; set; }
}

public class SystemInfo
{
    public int type { get; set; }
    public int id { get; set; }
    public string country { get; set; }
    public int sunrise { get; set; }
    public int sunset { get; set; }
}

public class Weather
{
    public int id { get; set; }
    public string main { get; set; }
    public string description { get; set; }
    public string icon { get; set; }
}

check your _base property in the WeatherInfo class - it needs to be @base with the JsonProperty attribute since ‘base’ is reserved in C#. also make sure your test method has the [Test] attribute and returns Task, not async Task. that’s prob why it’s hanging.

I’ve seen this before - your test runner isn’t handling async methods right. Make sure your method has the [Test] attribute and you’re using proper async patterns. The infinite execution happens because the test framework can’t tell when your async method finishes. For the deserialization issue, it’s that ‘base’ field causing problems. Since ‘base’ is reserved in C#, either add [JsonProperty(“base”)] to your _base property or just rename it. Also check that your numeric types match what the JSON returns - some APIs send decimals that’ll silently break deserialization. Double-check you’re actually awaiting the async call in your test setup.

Had the same hanging issue when I started testing with RestSharp. It’s usually a deadlock in your test setup, not the API call. If you’re using NUnit, add .ConfigureAwait(false) to your ExecuteAsync call - this prevents context switching problems. Also check your test method signature. It should be [Test] public async Task RetrieveWeatherData(), not just public async Task. For the JSON deserialization - yeah, there’s the base property issue others covered, but I noticed you’re not doing anything with weatherInfo after deserializing. Add some validation or assertions to make sure deserialization actually worked. Silent JSON mapping failures can cause weird test behavior.

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