public void GetCharacter_ReturnsEmptyString_WhenCharacterClassIsEmpty()
{
var charClassEmpty = new CharacterClassExpression(_alphabet, _randomGenerator, _maxInverseLength);
var result = charClassEmpty.GetRandomCharacter();
Assert.AreEqual(string.Empty, result);
}
public void GetCharacter_ReturnsFirstCharacter_WhenCharacterClassContainsSingleCharacter()
{
var charClassF = new CharacterClassExpression(_alphabet, _randomGenerator, _maxInverseLength);
charClassF.AddCharacters(new List <string> {
"F"
});
var result = charClassF.GetRandomCharacter();
Assert.AreEqual("F", result);
_randomGenerator.Received(0).GetNextInteger(Arg.Any <int>(), Arg.Any <int>());
}
public void GetCharacter_ReturnsThirdCharacter_WhenCharacterClassContainsThreeCharactersAndRandomGeneratorReturns2()
{
_randomGenerator.GetNextInteger(Arg.Any <int>(), Arg.Any <int>()).Returns(2);
var charClassF = new CharacterClassExpression(_alphabet, _randomGenerator, _maxInverseLength);
charClassF.AddCharacters(new List <string> {
"F", "r", "a"
});
var result = charClassF.GetRandomCharacter();
Assert.AreEqual("a", result);
_randomGenerator.Received(1).GetNextInteger(Arg.Any <int>(), Arg.Any <int>());
}