xUnit-testing-REST-api

This project demonstrates how to write unit and integration tests for a REST API built with ASP.NET Core, Entity Framework Core, and xUnit.

📌 Project Overview

• REST API with basic CRUD operations for Employee.
• Service layer implemented with Entity Framework Core.
• Tests written using xUnit framework.
• Two different testing strategies explored:
  • Moq (strict unit testing, mocking DbContext and DbSet)
  • EF Core InMemory Database (integration style testing with a real DbContext in memory)

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🧪 Testing Approach

🔹 Using InMemoryDatabase

For most service tests, I used Entity Framework Core’s InMemory provider:

var options = new DbContextOptionsBuilder<ApplicationDbContext>()
    .UseInMemoryDatabase("TestDb").Options;

using var context = new ApplicationDbContext(options);
var service = new EmployeeService(context);

// Act
await service.AddEmployee(new Employee { FirstName = "John" });

// Assert
Assert.Equal(1, await context.Employees.CountAsync());