public void StartNewElement(GherkinLineType newState)
{
var valid = false;
switch (this._currentParsingLineType)
{
case GherkinLineType.None:
valid = newState == GherkinLineType.FeatureHeader;
break;
case GherkinLineType.FeatureHeader:
valid = (newState == GherkinLineType.ScenarioHeader) || (newState == GherkinLineType.None);
break;
case GherkinLineType.ScenarioHeader:
valid = (newState == GherkinLineType.Given) || (newState == GherkinLineType.When) ||
(newState == GherkinLineType.Then);
break;
case GherkinLineType.Given:
valid = (newState == GherkinLineType.When) || (newState == GherkinLineType.Then) ||
(newState == GherkinLineType.But) || (newState == GherkinLineType.None);
break;
case GherkinLineType.When:
valid = (newState == GherkinLineType.Then) || (newState == GherkinLineType.But) ||
(newState == GherkinLineType.None);
break;
case GherkinLineType.Then:
valid = (newState == GherkinLineType.But) || (newState == GherkinLineType.None) ||
(newState == GherkinLineType.ScenarioHeader);
break;
default:
throw new Exception("Current state of Gherkin object unexpected.");
}
if (!valid) {throw new InvalidOperationException
(String.Format("Cannot create {0} element after {1} element.", newState, _currentParsingLineType));}
if (!(GherkinLineType.None | GherkinLineType.But).HasFlag(newState)) { this._currentParsingLineType = newState; }
}
private void TestStartingNewElement(Gherkin gherkin, GherkinLineType type, bool expectedValid)
{
try
{
gherkin.StartNewElement(type);
Assert.That(expectedValid, Is.EqualTo(true),
String.Format("No exceptions thrown for state transition to {0} - expected the state transition to be not valid.", type));
}
catch (Exception ex)
{
Assert.That(expectedValid, Is.EqualTo(false),
string.Format("Exception thrown on state transition to {0} - {1}", type, ex.StackTrace));
}
}
public Gherkin()
{
_scenarios = new List<GherkinScenario>();
_currentParsingLineType = GherkinLineType.None;
}
