Feat/get department by id

src/Application/Departments/Queries/GetDepartmentById.cs

@@ -1,5 +1,9 @@
+using Application.Common.Interfaces;
 using Application.Common.Models.Dtos;
+using Application.Common.Models.Dtos.Physical;
+using AutoMapper;
 using MediatR;
+using Microsoft.EntityFrameworkCore;
 
 namespace Application.Departments.Queries;
 
@@ -9,4 +13,28 @@ public record Query : IRequest<DepartmentDto>
  {
  public Guid DepartmentId { get; init; }
  }
+ public class QueryHandler : IRequestHandler<Query, DepartmentDto>
+ {
+ private readonly IApplicationDbContext _context;
+ private readonly IMapper _mapper;
+
+ public QueryHandler(IApplicationDbContext context, IMapper mapper)
+ {
+ _context = context;
+ _mapper = mapper;
+ }
+
+ public async Task<DepartmentDto> Handle(Query request, CancellationToken cancellationToken)
+ {
+ var department = await _context.Departments.FirstOrDefaultAsync(x => x.Id.Equals(request.DepartmentId), cancellationToken);
+
+ if (department is null)
+ {
+ throw new KeyNotFoundException("Department does not exist.");
+ }
+
+ return _mapper.Map<DepartmentDto>(department);
+ }
+ }
+
 }

tests/Application.Tests.Integration/Departments/Queries/GetDepartmentByIdTests.cs

@@ -0,0 +1,52 @@
+using Application.Departments.Queries;
+using FluentAssertions;
+using Xunit;
+
+namespace Application.Tests.Integration.Departments.Queries;
+
+public class GetDepartmentByIdTests : BaseClassFixture
+{
+ public GetDepartmentByIdTests(CustomApiFactory apiFactory) : base(apiFactory)
+ {
+ }
+
+ [Fact]
+ public async Task ShouldReturnDepartment_WhenThatDepartmentExists()
+ {
+ // Arrange
+ var department = CreateDepartment();
+
+ await AddAsync(department);
+
+ var query = new GetDepartmentById.Query()
+ {
+ DepartmentId = department.Id,
+ };
+
+ // Act
+ var result = await SendAsync(query);
+
+ // Assert
+ result.Name.Should().Be(department.Name);
+
+ // Cleanup
+ Remove(department);
+ }
+
+ [Fact]
+ public async Task ShouldThrowNotFoundException_WhenThatDepartmentDoesNotExist()
+ {
+ // Arrange
+ var query = new GetDepartmentById.Query()
+ {
+ DepartmentId = Guid.NewGuid(),
+ };
+
+ // Act
+ var action = async () => await SendAsync(query);
+
+ // Assert
+ await action.Should().ThrowAsync<KeyNotFoundException>()
+ .WithMessage("Department does not exist.");
+ }
+}