public void HandleResultOperator ()
{
var resultOperator = new AnyResultOperator ();
var sqlStatement = _sqlStatementBuilder.GetSqlStatement();
var fakePreparedSelectProjection = Expression.Constant (false);
_stageMock
.Expect (mock => mock.PrepareSelectExpression (Arg<Expression>.Matches (e => e is SqlExistsExpression), Arg.Is (_context)))
.WhenCalled (
mi =>
{
var selectProjection = (Expression) mi.Arguments[0];
Assert.That (selectProjection, Is.TypeOf (typeof (SqlExistsExpression)));
var expectedExistsExpression = new SqlExistsExpression (new SqlSubStatementExpression (sqlStatement));
SqlExpressionTreeComparer.CheckAreEqualTrees (expectedExistsExpression, selectProjection);
})
.Return (fakePreparedSelectProjection);
_handler.HandleResultOperator (resultOperator, _sqlStatementBuilder, _generator, _stageMock, _context);
Assert.That (_sqlStatementBuilder.DataInfo, Is.TypeOf (typeof (StreamedScalarValueInfo)));
Assert.That (((StreamedScalarValueInfo) _sqlStatementBuilder.DataInfo).DataType, Is.EqualTo (typeof (Boolean)));
_stageMock.VerifyAllExpectations ();
Assert.That (_sqlStatementBuilder.SelectProjection, Is.SameAs (fakePreparedSelectProjection));
}
public void HandleResultOperator ()
{
var predicate = Expression.Constant (true);
var preparedPredicate = Expression.Constant (false);
var resultOperator = new AllResultOperator(predicate);
var sqlStatement = _sqlStatementBuilder.GetSqlStatement();
var fakePreparedSelectProjection = Expression.Constant (false);
_stageMock
.Expect (mock => mock.PrepareWhereExpression (
Arg<Expression>.Matches(e => e.NodeType == ExpressionType.Not && (((UnaryExpression) e).Operand == predicate)),
Arg<ISqlPreparationContext>.Matches(c=>c==_context)))
.Return (preparedPredicate);
_stageMock
.Expect (mock => mock.PrepareSelectExpression (Arg<Expression>.Matches (e => e.NodeType == ExpressionType.Not), Arg.Is (_context)))
.WhenCalled (
mi =>
{
var selectProjection = (Expression) mi.Arguments[0];
var expectedSubStatement = new SqlStatementBuilder (sqlStatement) { WhereCondition = preparedPredicate }.GetSqlStatement();
var expectedExistsExpression = new SqlExistsExpression (new SqlSubStatementExpression (expectedSubStatement));
var expectedExpression = Expression.Not (expectedExistsExpression);
SqlExpressionTreeComparer.CheckAreEqualTrees (expectedExpression, selectProjection);
})
.Return (fakePreparedSelectProjection);
_stageMock.Replay();
_handler.HandleResultOperator (resultOperator, _sqlStatementBuilder, _generator, _stageMock, _context);
_stageMock.VerifyAllExpectations ();
Assert.That (_sqlStatementBuilder.DataInfo, Is.TypeOf (typeof (StreamedScalarValueInfo)));
Assert.That (((StreamedScalarValueInfo) _sqlStatementBuilder.DataInfo).DataType, Is.EqualTo (typeof (Boolean)));
Assert.That (_sqlStatementBuilder.SelectProjection, Is.SameAs (fakePreparedSelectProjection));
}
public Expression VisitSqlExistsExpression (SqlExistsExpression expression)
{
var baseVisitedExpression = (SqlExistsExpression) VisitExtensionExpression (expression);
// Within an EXISTS query, an entity can be replaced by its IdentityExpression, so try to simplify it.
var newInnerExpression = _entityIdentityResolver.ResolvePotentialEntity (baseVisitedExpression.Expression);
if (newInnerExpression != baseVisitedExpression.Expression)
return VisitExpression (new SqlExistsExpression (newInnerExpression));
return baseVisitedExpression;
}
public void SetUp ()
{
_sqlExistsExpression = new SqlExistsExpression (Expression.Constant ("test"));
}
public Expression VisitSqlExistsExpression (SqlExistsExpression expression)
{
return VisitChildrenWithGivenSemantics (expression, SqlExpressionContext.ValueRequired);
}
public void VisitSqlExistsExpression_RevisitingTerminatesAfterInnerChanges_WithoutOuterChanges ()
{
var inner = Expression.Constant (0);
var existsExpression = new SqlExistsExpression (inner);
var fakeResolvedInner = new SqlLiteralExpression (1);
_resolverMock.Expect (mock => mock.ResolveConstantExpression (inner)).Return (fakeResolvedInner);
_entityIdentityResolverMock
.Expect (mock => mock.ResolvePotentialEntity (fakeResolvedInner))
.Return (fakeResolvedInner);
// No revisiting!
var result = _visitor.VisitExpression (existsExpression);
_resolverMock.VerifyAllExpectations ();
_entityIdentityResolverMock.VerifyAllExpectations ();
Assert.That (result, Is.TypeOf<SqlExistsExpression> ());
Assert.That (((SqlExistsExpression) result).Expression, Is.SameAs (fakeResolvedInner));
}
public void VisitSqlExistsExpression ()
{
var inner = Expression.Constant (0);
var existsExpression = new SqlExistsExpression (inner);
var fakeResolvedInner = new SqlLiteralExpression (1);
_resolverMock.Expect (mock => mock.ResolveConstantExpression (inner)).Return (fakeResolvedInner);
var fakeResolvedEntityIdentity = Expression.Constant (1);
_entityIdentityResolverMock
.Expect (mock => mock.ResolvePotentialEntity (fakeResolvedInner))
.Return (fakeResolvedEntityIdentity);
// Result is revisited
_resolverMock.Expect (mock => mock.ResolveConstantExpression (fakeResolvedEntityIdentity)).Return (fakeResolvedEntityIdentity);
_entityIdentityResolverMock.Expect (mock => mock.ResolvePotentialEntity (fakeResolvedEntityIdentity)).Return (fakeResolvedEntityIdentity);
var result = _visitor.VisitExpression (existsExpression);
_resolverMock.VerifyAllExpectations ();
_entityIdentityResolverMock.VerifyAllExpectations ();
Assert.That (result, Is.TypeOf<SqlExistsExpression>());
Assert.That (((SqlExistsExpression) result).Expression, Is.SameAs (fakeResolvedEntityIdentity));
}
public void VisitExistsExpression ()
{
var expression = new SqlExistsExpression (Expression.Constant ("test"));
SqlGeneratingExpressionVisitor.GenerateSql (expression, _commandBuilder, _stageMock);
var result = _commandBuilder.GetCommandText();
Assert.That (result, Is.EqualTo ("EXISTS(@1)"));
}
public void VisitSqlExistsExpression_AllowsComplexValuesInChildren ()
{
var expression = new SqlExistsExpression (CreateNewExpression());
var result = _predicateRequiredVisitor.VisitSqlExistsExpression (expression);
Assert.That(result, Is.SameAs (expression));
}
public void VisitSqlExistsExpression ()
{
var expression = new SqlExistsExpression (Expression.Constant (true));
var expectedResult = new SqlExistsExpression (new SqlConvertedBooleanExpression (Expression.Constant (1)));
var result = _predicateRequiredVisitor.VisitSqlExistsExpression (expression);
SqlExpressionTreeComparer.CheckAreEqualTrees (expectedResult, result);
}
