jdescopingtool/NEW/tests/JdeScoping.ConfigManager.Tests/ViewModels/Forms/SearchFormViewModelTests.cs

using JdeScoping.ConfigManager.Models;
using JdeScoping.ConfigManager.ViewModels.Forms;

namespace JdeScoping.ConfigManager.Tests.ViewModels.Forms;

public class SearchFormViewModelTests
{
    [Fact]
    public void Constructor_InitializesFromModel()
    {
        // Arrange
        var model = new SearchSection
        {
            MaxResultRows = 50000,
            TimeoutSeconds = 600,
            MaxConcurrentSearches = 10
        };

        // Act
        var sut = new SearchFormViewModel(model, () => { });

        // Assert
        sut.MaxResultRows.ShouldBe(50000);
        sut.TimeoutSeconds.ShouldBe(600);
        sut.MaxConcurrentSearches.ShouldBe(10);
    }

    [Fact]
    public void PropertyChange_UpdatesModel()
    {
        // Arrange
        var model = new SearchSection { MaxResultRows = 100000 };
        var sut = new SearchFormViewModel(model, () => { });

        // Act
        sut.MaxResultRows = 25000;

        // Assert
        model.MaxResultRows.ShouldBe(25000);
    }

    [Fact]
    public void PropertyChange_InvokesOnChanged()
    {
        // Arrange
        var model = new SearchSection();
        var changedInvoked = false;
        var sut = new SearchFormViewModel(model, () => changedInvoked = true);

        // Act
        sut.TimeoutSeconds = 120;

        // Assert
        changedInvoked.ShouldBeTrue();
    }

    [Fact]
    public void PropertyChange_RaisesPropertyChanged()
    {
        // Arrange
        var model = new SearchSection();
        var sut = new SearchFormViewModel(model, () => { });
        var propertyChangedRaised = false;
        sut.PropertyChanged += (s, e) =>
        {
            if (e.PropertyName == nameof(SearchFormViewModel.MaxConcurrentSearches))
                propertyChangedRaised = true;
        };

        // Act
        sut.MaxConcurrentSearches = 8;

        // Assert
        propertyChangedRaised.ShouldBeTrue();
    }

    [Fact]
    public void Constructor_ThrowsOnNullModel()
    {
        // Act & Assert
        Should.Throw<ArgumentNullException>(() => new SearchFormViewModel(null!, () => { }));
    }

    [Fact]
    public void Constructor_ThrowsOnNullCallback()
    {
        // Arrange
        var model = new SearchSection();

        // Act & Assert
        Should.Throw<ArgumentNullException>(() => new SearchFormViewModel(model, null!));
    }

    [Fact]
    public void PropertyChange_DoesNotInvokeOnChangedWhenValueUnchanged()
    {
        // Arrange
        var model = new SearchSection { MaxResultRows = 50000 };
        var changedCount = 0;
        var sut = new SearchFormViewModel(model, () => changedCount++);

        // Act - set to same value
        sut.MaxResultRows = 50000;

        // Assert
        changedCount.ShouldBe(0);
    }
}