public void TestCloneBinaryExpression()
{
BinaryExpression binaryExpression = new BinaryExpression()
{
Type = BinaryType.Add,
Left = new ColumnReference()
{
Identifiers = new List <string>()
{
"c1"
}
},
Right = new IntegerLiteral()
{
Value = 3
}
};
var clone = binaryExpression.Clone() as BinaryExpression;
Assert.AreEqual(binaryExpression, clone);
Assert.IsFalse(ReferenceEquals(binaryExpression, clone));
Assert.IsFalse(ReferenceEquals(binaryExpression.Left, clone.Left));
Assert.IsFalse(ReferenceEquals(binaryExpression.Right, clone.Right));
}
public void Clone_BinaryExpression()
{
//Arrange
var expr1 = new NumberExpression(-2);
var expr2 = new NumberExpression(3);
var actual = new BinaryExpression(expr1, OperatorTypes.Power, expr2);
//Act
var expected = (BinaryExpression)actual.Clone();
//Assert
Assert.IsTrue(!Object.ReferenceEquals(actual, expected));
Assert.AreEqual(actual.Execute().Count.Re.ToNumber(), expected.Execute().Count.Re.ToNumber());
}
public virtual Differences VisitBinaryExpression(BinaryExpression binaryExpression1, BinaryExpression binaryExpression2){
Differences differences = new Differences(binaryExpression1, binaryExpression2);
if (binaryExpression1 == null || binaryExpression2 == null){
if (binaryExpression1 != binaryExpression2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
BinaryExpression changes = (BinaryExpression)binaryExpression2.Clone();
BinaryExpression deletions = (BinaryExpression)binaryExpression2.Clone();
BinaryExpression insertions = (BinaryExpression)binaryExpression2.Clone();
if (binaryExpression1.NodeType == binaryExpression2.NodeType) differences.NumberOfSimilarities++; else differences.NumberOfDifferences++;
Differences diff = this.VisitExpression(binaryExpression1.Operand1, binaryExpression2.Operand1);
if (diff == null){Debug.Assert(false); return differences;}
changes.Operand1 = diff.Changes as Expression;
deletions.Operand1 = diff.Deletions as Expression;
insertions.Operand1 = diff.Insertions as Expression;
Debug.Assert(diff.Changes == changes.Operand1 && diff.Deletions == deletions.Operand1 && diff.Insertions == insertions.Operand1);
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
diff = this.VisitExpression(binaryExpression1.Operand2, binaryExpression2.Operand2);
if (diff == null){Debug.Assert(false); return differences;}
changes.Operand2 = diff.Changes as Expression;
deletions.Operand2 = diff.Deletions as Expression;
insertions.Operand2 = diff.Insertions as Expression;
Debug.Assert(diff.Changes == changes.Operand2 && diff.Deletions == deletions.Operand2 && diff.Insertions == insertions.Operand2);
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
if (differences.NumberOfDifferences == 0){
differences.Changes = null;
differences.Deletions = null;
differences.Insertions = null;
}else{
differences.Changes = changes;
differences.Deletions = deletions;
differences.Insertions = insertions;
}
return differences;
}
public override Expression VisitBinaryExpression(BinaryExpression binaryExpression)
{
if (binaryExpression == null) return null;
binaryExpression = (BinaryExpression)base.VisitBinaryExpression((BinaryExpression)binaryExpression.Clone());
return binaryExpression;
}