public void BuildTree_EmptyExpression_ReturnsEmptyExpressionTree()
{
List <Token> tokens = new List <Token>();
EndOfTokenStreamException exception = Assert.Throws <EndOfTokenStreamException>(
() => builder.BuildTree(new Tokens(tokens))
);
Assert.AreEqual("Unexpected end of token stream", exception.Message);
}
public void BuildTree_IllegalEndOfStream_ThrowsException()
{
List <Token> tokens = new List <Token>
{
new Token(TokenType.LeftParentheses),
new Token(TokenType.Number, "1"),
};
EndOfTokenStreamException exception = Assert.Throws <EndOfTokenStreamException>(
() => builder.BuildTree(new Tokens(tokens))
);
Assert.AreEqual("Unexpected end of token stream", exception.Message);
}
