public void ScanNumber()
{
var scanner = new ExpressionScanner();
var token = scanner.Scan("123").First();
Assert.AreEqual(TokenType.Integer, token.Type);
Assert.AreEqual("123", token.Lexeme);
token = scanner.Scan("-1293281").First();
Assert.AreEqual(TokenType.Integer, token.Type);
Assert.AreEqual("-1293281", token.Lexeme);
token = scanner.Scan("129.3281").First();
Assert.AreEqual(TokenType.Float, token.Type);
Assert.AreEqual("129.3281", token.Lexeme);
token = scanner.Scan("-293847.2724379324").First();
Assert.AreEqual(TokenType.Float, token.Type);
Assert.AreEqual("-293847.2724379324", token.Lexeme);
token = scanner.Scan("-.2724379324").First();
Assert.AreEqual(TokenType.Float, token.Type);
Assert.AreEqual("-.2724379324", token.Lexeme);
}
public void Parse()
{
var scanner = new ExpressionScanner();
var parser = new ExpressionParser();
var tokens = scanner.Scan("alias_by_fragment(ema(servers.srv-aps3.system.processor.total*, 50), 2, 4)");
var expressions = parser.Parse(new TokenStream(tokens)).ToArray();
Assert.AreEqual(1, expressions.Length);
tokens = scanner.Scan("summarize(alias_by_fragment(ema(servers.srv-aps3.system.processor.{total*,user*}, 50), 2, 4), 'sum', '1d', false)");
expressions = parser.Parse(new TokenStream(tokens)).ToArray();
Assert.AreEqual(1, expressions.Length);
tokens = scanner.Scan(
"aliasByNode(sortByName(servers.mow1aps13.system.network.intel*.bytes_sent_sec), 1, 5)," +
"scale(aliasByNode(sortByName(servers.mow1aps13.system.network.intel*.bytes_received_sec), 1, 5), -1)");
expressions = parser.Parse(new TokenStream(tokens)).ToArray();
Assert.AreEqual(2, expressions.Length);
Assert.IsInstanceOf <FunctionInvocationExpression>(expressions[0]);
Assert.IsInstanceOf <FunctionInvocationExpression>(expressions[1]);
}
public void Expression12()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan(">=");
result.Should().Have.SameSequenceAs(
new Token("geq", ">=")
);
}
public void Expression4()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan("2.2.3");
result.Should().Have.SameSequenceAs(
new Token("float", "2.2"),
new Token("float", ".3")
);
}
public void Expression7()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan("var:=10");
result.Should().Have.SameSequenceAs(
new Token("identifier", "var"),
new Token("assign", ":="),
new Token("integer", "10")
);
}
public void Expression8()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan("var*10");
result.Should().Have.SameSequenceAs(
new Token("identifier", "var"),
new Token("times", "*"),
new Token("integer", "10")
);
}
public void Expression15()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan(">>=<<=");
result.Should().Have.SameSequenceAs(
new Token("gt", ">"),
new Token("geq", ">="),
new Token("lt", "<"),
new Token("leq", "<=")
);
}
public void Expression5()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan("(2.5+4)");
result.Should().Have.SameSequenceAs(
new Token("lparen", "("),
new Token("float", "2.5"),
new Token("plus", "+"),
new Token("integer", "4"),
new Token("rparen", ")")
);
}
public void Expression3()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan("2.2+2/2");
result.Should().Have.SameSequenceAs(
new Token("float", "2.2"),
new Token("plus", "+"),
new Token("integer", "2"),
new Token("divide", "/"),
new Token("integer", "2")
);
}
public void Expression9()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan("var* /* comment */ 10");
result.Should().Have.SameSequenceAs(
new Token("identifier", "var"),
new Token("times", "*"),
new Token("white_space", " "),
new Token("comment", "/* comment */"),
new Token("white_space", " "),
new Token("integer", "10")
);
}
public void Expression19()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan(">>=<>||&&<<===!!=");
result.Should().Have.SameSequenceAs(
new Token("gt", ">"),
new Token("geq", ">="),
new Token("neq", "<>"),
new Token("or", "||"),
new Token("and", "&&"),
new Token("lt", "<"),
new Token("leq", "<="),
new Token("eq", "=="),
new Token("not", "!"),
new Token("neq", "!=")
);
}
private Statement Parse(string expression)
{
var exprBytes = Encoding.UTF8.GetBytes(expression);
using (var exprStream = new MemoryStream(exprBytes))
{
var scanner = new ExpressionScanner();
scanner.SetSource(exprStream);
var parser = new ExpressionParser(scanner);
bool parsed = parser.Parse();
if (parsed)
{
return(parser.GetStatement());
}
else
{
return(null);
}
}
}
public void Scan()
{
var scanner = new ExpressionScanner();
var tokens = scanner.Scan("asPercent(Server01.connections.{failed,succeeded}, Server01.connections.attempted)").ToArray();
}
public ExpressionParser(ExpressionScanner scnr) : base(scnr)
{
}
public void Expression6()
{
var scanner = new ExpressionScanner();
var result = scanner.Scan("var=10").ToArray();
}
