public void WhenChangingProperty_ThenUpdatesCommand()
{
var someControl = new TextBox();
var oldCommand = new MockCommand();
var newCommand = new MockCommand();
var commandAction = new InvokeCommandAction();
commandAction.Attach(someControl);
commandAction.Command = oldCommand;
commandAction.Command = newCommand;
commandAction.InvokeAction(null);
Assert.IsTrue(newCommand.ExecuteCalled);
Assert.IsFalse(oldCommand.ExecuteCalled);
}
public void WhenCommandPropertyIsSet_ThenHooksUpCommandBehavior()
{
var someControl = new TextBox();
var commandAction = new InvokeCommandAction();
var command = new MockCommand();
commandAction.Attach(someControl);
commandAction.Command = command;
Assert.IsFalse(command.ExecuteCalled);
commandAction.InvokeAction(null);
Assert.IsTrue(command.ExecuteCalled);
Assert.AreSame(command, commandAction.GetValue(InvokeCommandAction.CommandProperty));
}
public void WhenAttachedAfterCommandPropertyIsSetAndInvoked_ThenInvokesCommand()
{
var someControl = new TextBox();
var commandAction = new InvokeCommandAction();
var command = new MockCommand();
commandAction.Command = command;
commandAction.Attach(someControl);
Assert.IsFalse(command.ExecuteCalled);
commandAction.InvokeAction(null);
Assert.IsTrue(command.ExecuteCalled);
Assert.AreSame(command, commandAction.GetValue(InvokeCommandAction.CommandProperty));
}
public void WhenInvokedWithCommandParameter_ThenPassesCommandParaeterToExecute()
{
var someControl = new TextBox();
var command = new MockCommand();
var parameter = new object();
var commandAction = new InvokeCommandAction();
commandAction.Attach(someControl);
commandAction.Command = command;
commandAction.CommandParameter = parameter;
Assert.IsNull(command.ExecuteParameter);
commandAction.InvokeAction(null);
Assert.IsTrue(command.ExecuteCalled);
Assert.IsNotNull(command.ExecuteParameter);
Assert.AreSame(parameter, command.ExecuteParameter);
}
public void WhenCommandParameterChanged_ThenUpdatesIsEnabledState()
{
var someControl = new TextBox();
var command = new MockCommand();
var parameter = new object();
var commandAction = new InvokeCommandAction();
commandAction.Attach(someControl);
commandAction.Command = command;
Assert.IsNull(command.CanExecuteParameter);
Assert.IsTrue(someControl.IsEnabled);
command.CanExecuteReturnValue = false;
commandAction.CommandParameter = parameter;
Assert.IsNotNull(command.CanExecuteParameter);
Assert.AreSame(parameter, command.CanExecuteParameter);
Assert.IsFalse(someControl.IsEnabled);
}
public void WhenCommandParameterNotSetAndEventArgsParameterPathSet_ThenPathedValuePassed()
{
var eventArgs = new TestEventArgs("testname");
var someControl = new TextBox();
var command = new MockCommand();
var parameter = new object();
var commandAction = new InvokeCommandAction();
commandAction.Command = command;
commandAction.TriggerParameterPath = "Thing1.Thing2.Name";
commandAction.Attach(someControl);
commandAction.InvokeAction(eventArgs);
Assert.AreEqual("testname", command.ExecuteParameter);
}
public void WhenCommandParameterNotSet_ThenEventArgsPassed()
{
var eventArgs = new TestEventArgs(null);
var someControl = new TextBox();
var command = new MockCommand();
var parameter = new object();
var commandAction = new InvokeCommandAction();
commandAction.Command = command;
commandAction.Attach(someControl);
commandAction.InvokeAction(eventArgs);
Assert.IsInstanceOfType(command.ExecuteParameter, typeof(TestEventArgs));
}
public void WhenCommandAndCommandParameterAreSetPriorToBehaviorBeingAttached_ThenCommandIsExecutedCorrectlyOnInvoke()
{
var someControl = new TextBox();
var command = new MockCommand();
var parameter = new object();
var commandAction = new InvokeCommandAction();
commandAction.Command = command;
commandAction.CommandParameter = parameter;
commandAction.Attach(someControl);
commandAction.InvokeAction(null);
Assert.IsTrue(command.ExecuteCalled);
}
public void WhenCommandIsSetAndThenBehaviorIsAttached_ThenCommandsCanExecuteIsCalledOnce()
{
var someControl = new TextBox();
var command = new MockCommand();
var commandAction = new InvokeCommandAction();
commandAction.Command = command;
commandAction.Attach(someControl);
Assert.AreEqual(1, command.CanExecuteTimesCalled);
}
public void WhenDetatched_ThenSetsCommandAndCommandParameterToNull()
{
var someControl = new TextBox();
var command = new MockCommand();
var parameter = new object();
var commandAction = new InvokeCommandAction();
commandAction.Attach(someControl);
commandAction.Command = command;
commandAction.CommandParameter = parameter;
Assert.IsNotNull(commandAction.Command);
Assert.IsNotNull(commandAction.CommandParameter);
commandAction.Detach();
Assert.IsNull(commandAction.Command);
Assert.IsNull(commandAction.CommandParameter);
}