HttpClient - REST - Interface / GET / POST

Question

Hello,

Is there a simple way to simulate a GET and POST message?

I do not want a SQL database, unnecessary overkill.

I just want to test the request where a successful response comes back.

Thanks for any tips in advance.

https://learn.microsoft.com/en-us/aspnet/web-api/overview/data/using-web-api-with-entity-framework/part-3

Answer 1

Hi @Markus Freitag,

As per your requirement, you just want to create a very simple test, just refer to the getting started documentation.

When you create a new WebAPI, you will find get and POST methods in ValuesController.

You can follow the docs and set some test data according to the client so you don't need to connect to the database.

You also need to know how to call the Web API from a .NET client.

Create a Web API Project

Call a Web API From a .NET Client (C#)

Below is the demo I wrote, you can refer to it.

WebAPI

public class ValuesController : ApiController
{
   
    public class RequestWorkorder
    {
        public string Program { get; set; }
        public string Workorder { get; set; }
    
    }
    RequestWorkorder[] requestWorkorders = new RequestWorkorder[]
   {
        new  RequestWorkorder { Program = "1", Workorder = "a" },
        new  RequestWorkorder { Program = "2", Workorder = "b", },
        new  RequestWorkorder{ Program = "3", Workorder = "c"}
   };
    public IEnumerable<RequestWorkorder> GetAllProducts()
    {
        return requestWorkorders;
    }

    public IHttpActionResult GetProduct(string program)
    {
        var product = requestWorkorders.FirstOrDefault((p) => p.Program == program);
        if (product == null)
        {
            return NotFound();
        }
        return Ok(product);
    }
   
    
    public IHttpActionResult Post([FromBody] RequestWorkorder requestWorkorder)
    {
        List<RequestWorkorder> requestWorkorders =new List<RequestWorkorder>();
        requestWorkorders.Add(requestWorkorder);
        return Ok();
    }


}

.NET client

public class RequestWorkorder
{
    public string Program { get; set; }
    public string Workorder { get; set; }

}

RequestWorkorder p = new RequestWorkorder()

{
    Program = "4",
    Workorder = "D"
};
using (var client = new HttpClient())
{
    client.BaseAddress = new Uri("https://localhost:44377/");
    client.DefaultRequestHeaders.Accept.Clear();
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    string authorization = $"{""}:{""}";
    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", "");
    //GET Method
    HttpResponseMessage response = await  client.GetAsync("api/Values");
    if (response.IsSuccessStatusCode)
    {
        List<RequestWorkorder> requestWorkorder = null;
        requestWorkorder = await response.Content.ReadAsAsync<List<RequestWorkorder>>();
        Console.WriteLine("Id:{0}\tName:{1}", requestWorkorder[0].Program, requestWorkorder[0].Workorder);

    }
    //POST Method
    HttpResponseMessage response1 = await client.PostAsJsonAsync("api/Values", p);

    if (response1.IsSuccessStatusCode)
    {

       
        Console.WriteLine("Success");
    }
    else
    {
        Console.WriteLine("Internal server Error");
    }
}

Best regards,

Lan Huang

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Answer 2

You can mock the behaviour of the HttpClient. Through the mock, you can test different responses. Perhaps this article will help you a bit: https://chrissainty.com/unit-testing-with-httpclient/

Answer 3

Is there a simple way to simulate a GET and POST message?

I do not want a SQL database, unnecessary overkill.

Yes.

Just create the WebAPI project according to the tutorial. You may forget about the Azure, SQL Server and others mentioned in the tutorial.

Create the project

The project includes the ValuesController, as follows:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;

namespace WebAPI2.Controllers
{
    public class ValuesController : ApiController
    {
        // GET api/values
        public IEnumerable<string> Get()
        {
            return new string[] { "value1", "value2" };
        }

        // GET api/values/5
        public string Get(int id)
        {
            return "value";
        }

        // POST api/values
        public void Post([FromBody] string value)
        {
        }

        // PUT api/values/5
        public void Put(int id, [FromBody] string value)
        {
        }

        // DELETE api/values/5
        public void Delete(int id)
        {
        }
    }
}

You can call the above action methods from the HttpClient.