internal void ParseExpression_OddNumberOfAddition()
{
var expectedAst = new AstBinaryExpression
{
Operator = CmdTokenKind.Plus,
Lhs = new AstBinaryExpression
{
Lhs = new AstNumberExpression
{
Value = "1"
},
Rhs = new AstNumberExpression
{
Value = "2"
},
Operator = CmdTokenKind.Plus
},
Rhs = new AstNumberExpression
{
Value = "3"
}
};
AstAssert.Expression(expectedAst, "1+2+3");
}
internal void ParseExpression_ParenthesisPrecedence_AdditionInParenthesisLowerInAstTreeThanMultiplication()
{
var expectedAst = new AstBinaryExpression
{
Operator = CmdTokenKind.Star,
Lhs = new AstBinaryExpression
{
Lhs = new AstNumberExpression
{
Value = "1"
},
Rhs = new AstNumberExpression
{
Value = "2"
},
Operator = CmdTokenKind.Plus
},
Rhs = new AstNumberExpression
{
Value = "3"
},
};
AstAssert.Expression(expectedAst, "(1+2)*3");
}
internal void ParseExpression_OperatorPrecedence_MultiplicationLowerInTreeAdditionHigher()
{
var expectedAst = new AstBinaryExpression
{
Operator = CmdTokenKind.Plus,
Lhs = new AstNumberExpression
{
Value = "2"
},
Rhs = new AstBinaryExpression
{
Lhs = new AstNumberExpression
{
Value = "2"
},
Rhs = new AstNumberExpression
{
Value = "2"
},
Operator = CmdTokenKind.Star
}
};
AstAssert.Expression(expectedAst, "2+2*2");
}
internal void ParseExpression_OddNumberOfMultiplication()
{
var expectedAst = new AstBinaryExpression
{
Operator = CmdTokenKind.Star,
Lhs = new AstBinaryExpression
{
Lhs = new AstNumberExpression
{
Value = "1"
},
Rhs = new AstNumberExpression
{
Value = "2"
},
Operator = CmdTokenKind.Star
},
Rhs = new AstNumberExpression
{
Value = "3"
},
};
AstAssert.Expression(expectedAst, "1*2*3");
}
public void VisitBinaryExpression(AstBinaryExpression binaryExpression)
{
Assert.IsType <AstBinaryExpression>(this.expected);
var expectedAst = (AstBinaryExpression)this.expected;
Assert.Equal(expectedAst.Operator, binaryExpression.Operator);
AssertVisit(expectedAst.Rhs, binaryExpression.Rhs);
AssertVisit(expectedAst.Lhs, binaryExpression.Lhs);
}
internal void ParseExpression_DivisionSupport()
{
var expectedAst = new AstBinaryExpression
{
Operator = CmdTokenKind.Slash,
Lhs = new AstNumberExpression
{
Value = "1"
},
Rhs = new AstNumberExpression
{
Value = "2"
}
};
AstAssert.Expression(expectedAst, "1/2");
}
internal void ParseExpression_SubtractionSupport()
{
var expectedAst = new AstBinaryExpression
{
Operator = CmdTokenKind.Minus,
Lhs = new AstNumberExpression
{
Value = "1"
},
Rhs = new AstNumberExpression
{
Value = "2"
}
};
AstAssert.Expression(expectedAst, "1-2");
}
public void Visit(AstBinaryExpression expr)
{
var opName =
String.IsNullOrEmpty(expr.OperatorSymbol)
? expr.OperatorName
: expr.OperatorSymbol;
var node =
StepsCluster
.AddNode(NodeInfo.NodeName)
.SetLabel(opName.Bold());
FollowExpression(expr.FirstOperand, node.ToNodeRef(DotCompass.NorthWest));
FollowExpression(expr.SecondOperand, node.ToNodeRef(DotCompass.SouthWest));
}
internal void ParseExpression_UnaryExpression_Precedence()
{
var expectedAst = new AstBinaryExpression
{
Operator = CmdTokenKind.Star,
Lhs = new AstUnaryExpression
{
Operator = CmdTokenKind.Minus,
Expression = new AstNumberExpression
{
Value = "6"
}
},
Rhs = new AstNumberExpression
{
Value = "2"
},
};
AstAssert.Expression(expectedAst, "-6*2");
}
public void ParseExpression_BooleanExpression_SupportFor()
{
var expectedAst = new AstBinaryExpression
{
Operator = CmdTokenKind.GreaterThan,
Lhs = new AstNumberExpression {
Value = "3"
},
Rhs = new AstBinaryExpression
{
Operator = CmdTokenKind.Plus,
Lhs = new AstNumberExpression {
Value = "1"
},
Rhs = new AstNumberExpression {
Value = "2"
},
}
};
AstAssert.Expression(expectedAst, "3>1+2");
}
