Dreamine.FullKit.Tests.ViewModels.ViewModelAndRelayCommandTests 클래스 참조

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클래스
class	TestViewModel

Public 멤버 함수
void	RelayCommand_ExecutesAndRaisesCanExecuteChanged ()
void	GenericRelayCommand_RejectsInvalidParameter ()
void	ViewModelBase_SetPropertyRaisesOnlyWhenValueChanges ()
async Task	AsyncRelayCommand_PreventsConcurrentExecution ()
void	AsyncRelayCommand_LastExceptionVisibleAfterFailure ()

상세한 설명

View Model And Relay Command Tests 기능과 관련 상태를 캡슐화합니다.

ViewModelAndRelayCommandTests.cs 파일의 15 번째 라인에서 정의되었습니다.

멤버 함수 문서화

AsyncRelayCommand_LastExceptionVisibleAfterFailure()

void Dreamine.FullKit.Tests.ViewModels.ViewModelAndRelayCommandTests.AsyncRelayCommand_LastExceptionVisibleAfterFailure ( )

inline

Async Relay Command Last Exception Visible After Failure 작업을 수행합니다.

ViewModelAndRelayCommandTests.cs 파일의 129 번째 라인에서 정의되었습니다.

    {
        var ex = new InvalidOperationException("test");
        var command = new AsyncRelayCommand(() => Task.FromException(ex));
 
        command.Execute(null);
        Thread.Sleep(50);
 
        Assert.Same(ex, command.LastException);
    }

AsyncRelayCommand_PreventsConcurrentExecution()

async Task Dreamine.FullKit.Tests.ViewModels.ViewModelAndRelayCommandTests.AsyncRelayCommand_PreventsConcurrentExecution ( )

inline

Async Relay Command Prevents Concurrent Execution 작업을 수행합니다.

반환값

Async Relay Command Prevents Concurrent Execution 작업에서 생성한 Task 결과입니다.

ViewModelAndRelayCommandTests.cs 파일의 101 번째 라인에서 정의되었습니다.

    {
        var concurrentCount = 0;
        var maxConcurrent = 0;
        var command = new AsyncRelayCommand(async () =>
        {
            var c = Interlocked.Increment(ref concurrentCount);
            Interlocked.Exchange(ref maxConcurrent, Math.Max(Volatile.Read(ref maxConcurrent), c));
            await Task.Delay(30);
            Interlocked.Decrement(ref concurrentCount);
        });
 
        var tasks = Enumerable.Range(0, 10).Select(_ => Task.Run(() => command.Execute(null)));
        await Task.WhenAll(tasks);
        await Task.Delay(100); // let the one accepted execution finish
 
        Assert.Equal(1, maxConcurrent);
    }

GenericRelayCommand_RejectsInvalidParameter()

void Dreamine.FullKit.Tests.ViewModels.ViewModelAndRelayCommandTests.GenericRelayCommand_RejectsInvalidParameter ( )

inline

Generic Relay Command Rejects Invalid Parameter 작업을 수행합니다.

ViewModelAndRelayCommandTests.cs 파일의 50 번째 라인에서 정의되었습니다.

    {
        var command = new RelayCommand<int>(_ => { }, value => value > 0);
 
        // CanExecute returns false for a bad parameter type — Execute silently no-ops.
        Assert.False(command.CanExecute("bad"));
        var executed = false;
        command = new RelayCommand<int>(_ => executed = true, value => value > 0);
        command.Execute("bad");
        Assert.False(executed);
    }

RelayCommand_ExecutesAndRaisesCanExecuteChanged()

void Dreamine.FullKit.Tests.ViewModels.ViewModelAndRelayCommandTests.RelayCommand_ExecutesAndRaisesCanExecuteChanged ( )

inline

Relay Command Executes And Raises Can Execute Changed 작업을 수행합니다.

ViewModelAndRelayCommandTests.cs 파일의 26 번째 라인에서 정의되었습니다.

    {
        var executed = false;
        var raised = false;
        var command = new RelayCommand(() => executed = true, () => true);
        command.CanExecuteChanged += (_, _) => raised = true;
 
        command.Execute(null);
        command.RaiseCanExecuteChanged();
 
        Assert.True(executed);
        Assert.True(command.CanExecute(null));
        Assert.True(raised);
    }

ViewModelBase_SetPropertyRaisesOnlyWhenValueChanges()

void Dreamine.FullKit.Tests.ViewModels.ViewModelAndRelayCommandTests.ViewModelBase_SetPropertyRaisesOnlyWhenValueChanges ( )

inline

View Model Base Set Property Raises Only When Value Changes 작업을 수행합니다.

ViewModelAndRelayCommandTests.cs 파일의 71 번째 라인에서 정의되었습니다.

    {
        var viewModel = new TestViewModel();
        var propertyNames = new List<string?>();
        viewModel.PropertyChanged += (_, args) => propertyNames.Add(args.PropertyName);
 
        viewModel.Name = "one";
        viewModel.Name = "one";
        viewModel.Name = "two";
 
        Assert.Equal(new[] { "Name", "Name" }, propertyNames);
    }

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이 클래스에 대한 문서화 페이지는 다음의 파일로부터 생성되었습니다.:

• ViewModelAndRelayCommandTests.cs