Test HTTP API Endpoint in Visual Studio without using Postman

Now, using Visual Studio 17.5, you can test our API endpoints with the help of Visual Studio.

Let’s start with a practical implementation.

Step 1

Create a new .NET Core Web API project.

Step 2

Inside the new project, create one API controller and different endpoints, which we are going to test using an HTTP file.

using Microsoft.AspNetCore.Mvc;
using RudderStackDemo.Entities;
using RudderStackDemo.Repositories;

namespace RudderStackDemo.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class ProductsController : ControllerBase
    {
        private readonly IProductService _productService;

        public ProductsController(IProductService productService)
        {
            _productService = productService;
        }

        /// <summary>
        /// Product List
        /// </summary>
        /// <returns></returns>
        [HttpGet]
        public async Task<IActionResult> ProductListAsync()
        {
            var productList = await _productService.ProductListAsync();
            if (productList != null)
            {
                return Ok(productList);
            }
            else
            {
                return NoContent();
            }
        }

        /// <summary>
        /// Get Product By Id
        /// </summary>
        /// <param name="productId"></param>
        /// <returns></returns>
        [HttpGet("{productId}")]
        public async Task<IActionResult> GetProductDetailsByIdAsync(int productId)
        {
            var productDetails = await _productService.GetProductDetailByIdAsync(productId);
            if (productDetails != null)
            {
                return Ok(productDetails);
            }
            else
            {
                return NotFound();
            }
        }

        /// <summary>
        /// Add a new product
        /// </summary>
        /// <param name="productDetails"></param>
        /// <returns></returns>
        [HttpPost]
        public async Task<IActionResult> AddProductAsync(ProductDetails productDetails)
        {
            var isProductInserted = await _productService.AddProductAsync(productDetails);
            if (isProductInserted)
            {
                return Ok(isProductInserted);
            }
            else
            {
                return BadRequest();
            }
        }

        /// <summary>
        /// Update product details
        /// </summary>
        /// <param name="productDetails"></param>
        /// <returns></returns>
        [HttpPut]
        public async Task<IActionResult> UpdateProductAsync(ProductDetails productDetails)
        {
            var isProductUpdated = await _productService.UpdateProductAsync(productDetails);
            if (isProductUpdated)
            {
                return Ok(isProductUpdated);
            }
            else
            {
                return BadRequest();
            }
        }

        /// <summary>
        /// Delete product by id
        /// </summary>
        /// <param name="productId"></param>
        /// <returns></returns>
        [HttpDelete]
        public async Task<IActionResult> DeleteProductAsync(int productId)
        {
            var isProductDeleted = await _productService.DeleteProductAsync(productId);
            if (isProductDeleted)
            {
                return Ok(isProductDeleted);
            }
            else
            {
                return BadRequest();
            }
        }
    }
}

Step 3

Right-click on the project name in the solution and add the API-Test.http file inside your project.

Step 4

Add different HTTP endpoint requests inside the HTTP file.

GET https://localhost:7178/api/Products

###

@productId = 2
GET https://localhost:7178/api/Products/{{productId}}

###

POST https://localhost:7178/api/Products
Content-Type application/json

{
  "id": 3,
  "productName": "Laptop",
  "productDescription": "HP Pavilion",
  "productPrice": 80000,
  "productStock": 10
}

###

PUT https://localhost:7178/api/Products
Content-Type application/json

{
  "id": 3,
  "productName": "Laptop",
  "productDescription": "DELL",
  "productPrice": 80000,
  "productStock": 10
}

###

DELETE https://localhost:7178/api/Products?productId=1

Step 5

Now you can execute the individual API endpoint after clicking on the run button corresponding to each request as shown below.

GitHub

https://github.com/Jaydeep-007/API_Test_Demo.git

Happy Learning!