public async Task AsyncCommandBase_T_FrameworkMethodsMustBeCalledWithData_ReferenceType()
{
ICommand command = new AsyncTestCommand <string>();
bool canExecute = command.CanExecute("240");
Assert.True(canExecute);
Assert.Throws <ArgumentNullException>("parameter", () => command.CanExecute(null));
command.Execute("240");
await Assert.ThrowsAsync <ArgumentNullException>("parameter", () => ((AsyncCommandBase <string>)command).InternalExecuteAsync(null));
}
public async Task AsyncCommandBase_T_FrameworkMethodsMustBeCalledWithData_ValueType()
{
ICommand command = new AsyncTestCommand <int>();
bool canExecute = command.CanExecute(240);
Assert.True(canExecute);
Assert.Throws <NullReferenceException>(() => command.CanExecute(null));
command.Execute(240);
await Assert.ThrowsAsync <NullReferenceException>(() => ((AsyncCommandBase <int>)command).InternalExecuteAsync(null));
}
public async Task AsyncCommandBase_FrameworkMethodsMustBeCalledWithoutData()
{
ICommand command = new AsyncTestCommand();
bool canExecute = command.CanExecute(null);
Assert.True(canExecute);
Assert.Throws <ArgumentException>("parameter", () => command.CanExecute(240));
command.Execute(null);
await Assert.ThrowsAsync <ArgumentException>("parameter", () => ((AsyncCommandBase)command).InternalExecuteAsync(240));
}
public async Task AsyncCommandBase_T_NonGenericFrameworkMethodsMustBeCalledWithDataOfTypeCompatibleWithGenericTypeParameter()
{
ICommand command = new AsyncTestCommand <float>();
Assert.Throws <InvalidCastException>(() => command.CanExecute(240.0));
await Assert.ThrowsAsync <InvalidCastException>(() => ((AsyncCommandBase <float>)command).InternalExecuteAsync(240.0));
}
public void AsyncCommandBase_T_FrameworkMethodsCallIntoStronglyTypedImplementations()
{
string? text = null;
ICommand command = new AsyncTestCommand <string>(t => text = t, t => { text = t; return(Task.CompletedTask); });
bool canExecute = command.CanExecute(nameof(ICommand.CanExecute));
Assert.Equal("CanExecute", text);
Assert.True(canExecute);
command.Execute(nameof(ICommand.Execute));
Assert.Equal("Execute", text);
}
public void AsyncCommandBase_FrameworkMethodsCallIntoParameterlessImplementations()
{
string? text = null;
ICommand command = new AsyncTestCommand(() => text = nameof(ICommand.CanExecute), () => { text = nameof(ICommand.Execute); return(Task.CompletedTask); });
bool canExecute = command.CanExecute(null);
Assert.Equal("CanExecute", text);
Assert.True(canExecute);
command.Execute(null);
Assert.Equal("Execute", text);
}