public void GenerationWithAllSubstitutions()
{
var g = new Grammar();
var subject = new Symbol("SUBJECT");
var animal = new Symbol("ANIMAL");
var person = new Symbol("PERSON");
g.AddSubstitution(new Substitution(subject, new Sentence("{ANIMAL}")));
g.AddSubstitution(new Substitution(subject, new Sentence("{PERSON}")));
g.AddSubstitution(new Substitution(animal, new Sentence("a dog")));
g.AddSubstitution(new Substitution(animal, new Sentence("a cat")));
g.AddSubstitution(new Substitution(person, new Sentence("John")));
var startSentence = new Sentence("This is {SUBJECT}.");
var results = new string[100];
for (int i = 0; i < 100; i++)
{
var result = g.ApplyAllSubstitutions(startSentence);
results[i] = result.FinalOutput;
}
Assert.True(results.Contains("This is a dog."));
Assert.True(results.Contains("This is a cat."));
Assert.True(results.Contains("This is John."));
}
public void AddSubstitution()
{
var g = new Grammar();
var subject = new Symbol("SUBJECT");
g.AddSubstitution(subject, new Sentence("John"));
Assert.Equal(1, g.Symbols.Count);
Assert.Equal(1, g.Substitutions.Count);
Assert.Equal(subject, g.Substitutions[0].Symbol);
}
public void SimpleGenerationWithVerticalBar()
{
var g = new Grammar();
var substitution = new Substitution(new Symbol("VERTICAL_BAR"), new Sentence("this is a vertical bar: ||."));
g.AddSubstitution(substitution);
var startSentence = new Sentence("A vertical bar test: {VERTICAL_BAR}");
var result = g.ApplySubstitution(startSentence, substitution);
Assert.Equal("A vertical bar test: this is a vertical bar: |.", result.FinalOutput);
}
public void SimpleGenerationWithBrace()
{
var g = new Grammar();
var subject = new Symbol("SUBJECT");
var substitution = new Substitution(subject, new Sentence("John"));
g.AddSubstitution(substitution);
var startSentence = new Sentence("{SUBJECT} is a subject {{brace test: {{SUBJECT}}, {{HELLO!}}}}.");
var result = g.ApplySubstitution(startSentence, substitution);
Assert.Equal("John is a subject {brace test: {SUBJECT}, {HELLO!}}.", result.FinalOutput);
}
public Grammar GrammarFromText(string content)
{
var result = new Grammar();
var helper = new SubstitutionHelper();
content = content.Replace("\r\n", "\n");
var lines = content.Split('\n');
var lineCount = 0;
foreach (var line in lines)
{
lineCount++;
if (string.IsNullOrWhiteSpace(line) || line.StartsWith("#"))
{
continue;
}
if (!line.Contains(":"))
{
throw new TinyGrammarException(string.Format("Error on line {0}: missing \":\".", lineCount));
}
var symbolEndPosition = line.IndexOf(":");
var symbolName = line.Substring(0, symbolEndPosition);
var sentenceExpression = line.Substring(symbolEndPosition + 1, line.Length - 1 - symbolEndPosition);
sentenceExpression = helper.HandleSpecialCharacters(sentenceExpression);
foreach (var altSentenceExpression in helper.GetAlternativeExpressions(sentenceExpression))
{
result.AddSubstitution(
helper.CleanupSymbolName(symbolName),
helper.UnHandleSpecialCharacters(altSentenceExpression)
);
}
}
return(result);
}