public void Choose_EmptySequence_ReturnsError()
{
var parser = Parse.Choose <char>();
var result = parser.Parse("z");
ParseAssert.IsError(result);
}
public void Choose_SuccesfulParsers_ReturnsFirstSuccess()
{
var parser = Parse.Choose(Chars.Char('x'),
Chars.Char('y'),
Chars.Char('z'));
var result = parser.Parse("y");
ParseAssert.ValueEquals('y', result);
}
public void Choose_UnsuccesfulParsers_ReturnsError()
{
var parser = Parse.Choose(Chars.Char('x'),
Chars.Char('y'),
Chars.Char('z'));
var result = parser.Parse("a");
ParseAssert.IsError(result);
}
