ant-design-blazor/tests/AntDesign.Tests/Select/Actions/Select.OnDataSourceChangeTests.razor

@inherits AntDesignTestBase
@code {
    record Person(int Id, string Name);
    List<Person> _persons = new List<Person>
    {
        new Person(1, "John"),
        new Person(2, "Lucy"),
        new Person(3, "Jack"),
        new Person(4, "Emily"),
    };

    [Fact]
    public async Task Action_fired_when_datasource_changed()
    {
        //Arrange
        JSInterop.Setup<AntDesign.JsInterop.DomRect>(JSInteropConstants.GetBoundingClientRect, _ => true)
            .SetResult(new AntDesign.JsInterop.DomRect());        
        bool handlerCalled = false;
        Action OnDataSourceChangedHandler = () => handlerCalled = true;

        var cut = Render<AntDesign.Select<int, Person>>(
        @<AntDesign.Select DataSource="@_persons"            
            LabelName="@nameof(Person.Name)"
            ValueName="@nameof(Person.Id)"
            Value="0"
            OnDataSourceChanged="OnDataSourceChangedHandler">
        </AntDesign.Select>);
        //Act
        cut.SetParametersAndRender(parameters => parameters.Add(p => p.DataSource, new List<Person>()));        
        //Assert
        handlerCalled.Should().BeTrue();
    }

    [Fact]
    public async Task Action_not_fired_when_datasource_item_added()
    {
        //Arrange
        JSInterop.Setup<AntDesign.JsInterop.DomRect>(JSInteropConstants.GetBoundingClientRect, _ => true)
            .SetResult(new AntDesign.JsInterop.DomRect());        
        bool handlerCalled = false;
        Action OnDataSourceChangedHandler = () => handlerCalled = true;
        
        var cut = Render<AntDesign.Select<int, Person>>(
        @<AntDesign.Select DataSource="@_persons"            
            LabelName="@nameof(Person.Name)"
            ValueName="@nameof(Person.Id)"
            Value="0"
            OnDataSourceChanged="OnDataSourceChangedHandler">
        </AntDesign.Select>);
        //Act
        _persons.Add(new Person(5, "Fank"));
        cut.SetParametersAndRender(parameters => parameters.Add(p => p.DataSource, _persons));
        //Assert
        handlerCalled.Should().BeFalse();
    }

    [Fact]
    public async Task Action_not_fired_when_datasource_item_removed()
    {
        //Arrange
        JSInterop.Setup<AntDesign.JsInterop.DomRect>(JSInteropConstants.GetBoundingClientRect, _ => true)
            .SetResult(new AntDesign.JsInterop.DomRect());
        bool handlerCalled = false;
        Action OnDataSourceChangedHandler = () => handlerCalled = true;
        _persons = new List<Person> { _persons[0] };
        var cut = Render<AntDesign.Select<int, Person>>(
        @<AntDesign.Select DataSource="@_persons"            
            LabelName="@nameof(Person.Name)"
            ValueName="@nameof(Person.Id)"
            Value="0"
            OnDataSourceChanged="OnDataSourceChangedHandler">
        </AntDesign.Select>);
        //Act
        _persons.RemoveAt(0);
        cut.SetParametersAndRender(parameters => parameters.Add(p => p.DataSource, _persons));
        //Assert
        handlerCalled.Should().BeFalse();
    }

    [Fact]
    public async Task Action_not_fired_when_datasource_cleared()
    {
        //Arrange
        JSInterop.Setup<AntDesign.JsInterop.DomRect>(JSInteropConstants.GetBoundingClientRect, _ => true)
            .SetResult(new AntDesign.JsInterop.DomRect());        
        bool handlerCalled = false;
        Action OnDataSourceChangedHandler = () => handlerCalled = true;
        
        var cut = Render<AntDesign.Select<int, Person>>(
        @<AntDesign.Select DataSource="@_persons"            
            LabelName="@nameof(Person.Name)"
            ValueName="@nameof(Person.Id)"
            Value="0"
            OnDataSourceChanged="OnDataSourceChangedHandler">
        </AntDesign.Select>);
        //Act
        _persons.Clear();
        cut.SetParametersAndRender(parameters => parameters.Add(p => p.DataSource, _persons));
        //Assert
        handlerCalled.Should().BeFalse();
    }
}