public void ShouldCreateAliasExpression()
{
var factory = new DbExpressionFactory();
var expression = factory.Alias(factory.Column("SomeColumn"), "sc");
Assert.IsNotNull(expression.Target);
Assert.IsNotNull(expression.Alias);
Assert.IsTrue(expression.ExpressionType == DbExpressionType.Alias);
}
public void ShouldReplaceExpressionsOfParticularTypeUsingPredicate()
{
var factory = new DbExpressionFactory();
var dbSelectQuery = new DbSelectQuery();
var expression = dbSelectQuery.Select(f => f.Column("SomeColumn")).From(f => f.Table("SomeTable"));
expression.Replace <DbTableExpression>(te => true, te => factory.Alias(te, "t0"));
var result = expression.Find <DbAliasExpression>(ae => true);
Assert.IsTrue(result.Count() == 1);
}
public void ShouldCreateAliasExpression()
{
var factory = new DbExpressionFactory();
var expression = factory.Alias(factory.Column("SomeColumn"), "sc");
Assert.IsNotNull(expression.Target);
Assert.IsNotNull(expression.Alias);
Assert.IsTrue(expression.ExpressionType == DbExpressionType.Alias);
}
public void ShouldReplaceExpressionsOfParticularTypeUsingPredicate()
{
var factory = new DbExpressionFactory();
var dbSelectQuery = new DbSelectQuery();
var expression = dbSelectQuery.Select(f => f.Column("SomeColumn")).From(f => f.Table("SomeTable"));
expression.Replace<DbTableExpression>(te => true, te => factory.Alias(te, "t0"));
var result = expression.Find<DbAliasExpression>(ae => true);
Assert.IsTrue(result.Count() == 1);
}
/// <summary>
/// Creates a new <see cref="DbAliasExpression"/> for the target <paramref name="dbExpression"/>.
/// </summary>
/// <param name="dbExpression">The <see cref="DbExpression"/> to be aliased.</param>
/// <param name="alias">The alias.</param>
/// <returns>A <see cref="DbAliasExpression"/> instance.</returns>
public static DbAliasExpression As(this DbExpression dbExpression, string alias)
{
return(ExpressionFactory.Alias(dbExpression, alias));
}