public void TestWrongOrder()
{
var command = new CompositeCommand();
command.Invoking(x => x.Undo()).ShouldThrow <InvalidOperationException>(because: "Should not allow Undo before Execute");
command.Execute();
command.Invoking(x => x.Execute()).ShouldThrow <InvalidOperationException>(because: "Should not allow two Executes without an Undo in between");
}
public void TestExecuteUndo()
{
var executeCalls = new List<int>(3);
var undoCalls = new List<int>(3);
var command = new CompositeCommand(
new MockCommand(() => executeCalls.Add(0), () => undoCalls.Add(0)),
new MockCommand(() => executeCalls.Add(1), () => undoCalls.Add(1)),
new MockCommand(() => executeCalls.Add(2), () => undoCalls.Add(2)));
command.Execute();
executeCalls.Should().Equal(new[] {0, 1, 2}, because: "Child commands should be executed in ascending order");
command.Undo();
undoCalls.Should().Equal(new[] {2, 1, 0}, because: "Child commands should be undone in descending order");
}
public void TestExecuteUndo()
{
var executeCalls = new List <int>(3);
var undoCalls = new List <int>(3);
var command = new CompositeCommand(
new MockCommand(() => executeCalls.Add(0), () => undoCalls.Add(0)),
new MockCommand(() => executeCalls.Add(1), () => undoCalls.Add(1)),
new MockCommand(() => executeCalls.Add(2), () => undoCalls.Add(2)));
command.Execute();
executeCalls.Should().Equal(new[] { 0, 1, 2 }, because: "Child commands should be executed in ascending order");
command.Undo();
undoCalls.Should().Equal(new[] { 2, 1, 0 }, because: "Child commands should be undone in descending order");
}
public void TestUndoRollback()
{
var executeCalls = new List<int>(3);
var undoCalls = new List<int>(3);
var command = new CompositeCommand(
new MockCommand(() => executeCalls.Add(0), () => { throw new OperationCanceledException(); }),
new MockCommand(() => executeCalls.Add(1), () => undoCalls.Add(1)),
new MockCommand(() => executeCalls.Add(2), () => undoCalls.Add(2)));
command.Execute();
executeCalls.Should().Equal(new[] {0, 1, 2}, because: "Child commands should be executed in ascending order");
executeCalls.Clear();
Assert.Throws<OperationCanceledException>(command.Undo, "Exceptions should be passed through after rollback");
undoCalls.Should().Equal(new[] {2, 1}, because: "After an exception the rest of the undoes should not be performed");
executeCalls.Should().Equal(new[] {1, 2}, because: "After an exception all successful undoes should be re-executed");
}
public void TestWrongOrder()
{
var command = new CompositeCommand();
Assert.Throws<InvalidOperationException>(command.Undo, "Should not allow Undo before Execute");
command.Execute();
Assert.Throws<InvalidOperationException>(command.Execute, "Should not allow two Executes without an Undo in between");
}