GetPositionsQueryHandlerTests.cs

namespace TalentManagementAPI.Application.Tests.Positions
{
    public class GetPositionsQueryHandlerTests
    {
        private readonly Mock<IPositionRepositoryAsync> _repositoryMock = new();
        private readonly Mock<IModelHelper> _modelHelperMock = new();

        [Fact]
        public async Task Handle_ShouldReturnPagedResult_FromRepositoryShape()
        {
            // Arrange
            var query = new GetPositionsQuery
            {
                Fields = "Id,PositionTitle",
                PageNumber = 1,
                PageSize = 5
            };

            var shaped = new List<Entity>
            {
                new() { ["Id"] = Guid.NewGuid(), ["PositionTitle"] = "Developer" }
            };

            var records = new RecordsCount { RecordsFiltered = 1, RecordsTotal = 1 };

            _modelHelperMock.Setup(m => m.ValidateModelFields<PositionSummaryDto>(It.IsAny<string>()))
                .Returns("Id,PositionTitle");
            _modelHelperMock.Setup(m => m.GetModelFields<PositionSummaryDto>())
                .Returns("Id,PositionTitle");

            _repositoryMock.Setup(r => r.GetPositionReponseAsync(query))
                .ReturnsAsync((shaped, records));

            var handler = new GetAllPositionsQueryHandler(_repositoryMock.Object, _modelHelperMock.Object);

            // Act
            var result = await handler.Handle(query, CancellationToken.None);

            // Assert
            result.IsSuccess.Should().BeTrue();
            result.Value.Should().BeEquivalentTo(shaped);
            result.IsFailure.Should().BeFalse();
            _repositoryMock.Verify(r => r.GetPositionReponseAsync(query), Times.Once);
        }
    }

}