public void CannotPeekEmpty()
{
var tokens = new List <Token>();
var walker = new TokensWalker(tokens);
walker.PeekNext();
}
public void CannotGetNextEmpty()
{
var tokens = new List <Token>();
var walker = new TokensWalker(tokens);
walker.GetNext();
}
public void CanHandleEmptyList()
{
var tokens = new List <Token>();
var walker = new TokensWalker(tokens);
Assert.IsFalse(walker.ThereAreMoreTokens);
}
public void AfterGettingLastThereAreNoMoreIsSet()
{
Token firstToken = new MinusToken();
var tokens = new List <Token>()
{
firstToken
};
var walker = new TokensWalker(tokens);
walker.GetNext();
Assert.IsFalse(walker.ThereAreMoreTokens);
}
public void CanGetExisting()
{
Token firstToken = new MinusToken();
var tokens = new List <Token>()
{
firstToken
};
var walker = new TokensWalker(tokens);
Assert.IsTrue(walker.ThereAreMoreTokens);
var first = walker.GetNext();
Assert.AreEqual(firstToken, first);
}