private void TestCastToString(SqlXml x, string expectedValue)
{
_SqlXml column1 = x;
_String expr = (_String)column1;
var dbExpr = (DbCastExpression)expr.DbExpression;
dbExpr.Verify(column1, typeof(SqlXml), typeof(string));
expr.VerifyEval(expectedValue);
}
private void TestFromString(string x, SqlXml expectedValue)
{
_String column1 = x;
_SqlXml expr = (_SqlXml)column1;
var dbExpr = (DbCastExpression)expr.DbExpression;
dbExpr.Verify(column1, typeof(string), typeof(SqlXml));
var result = expr.Eval();
Assert.AreEqual(expectedValue == null ? null : expectedValue.Value, result == null ? null : result.Value);
}
private static T _InvokeValue <T>(_SqlXml xmlColumn, string xPath, T asColumn)
where T : Column, new()
{
return(ValueFunctionInvoker <T> .Singleton.Invoke(asColumn, xmlColumn, _String.Const(xPath).AsSqlVarCharMax()));
}
private static TColumn _Value <TColumn, TValue>(TColumn targetColumn, _SqlXml xmlColumn, Column xPath)
where TColumn : Column <TValue>, new()
{
return(new XmlValueFunction <TValue>(xmlColumn, xPath, targetColumn).MakeColumn <TColumn>());
}
private void TestConst(SqlXml x)
{
_SqlXml column = _SqlXml.Const(x);
column.VerifyConst(x);
}
private void TestImplicit(SqlXml x)
{
_SqlXml column = x;
column.VerifyParam(x);
}
/// <summary>Creates a column of parameter expression.</summary>
/// <param name="x">The value of the parameter expression.</param>
/// <param name="sourceColumn">The value which will be passed to <see cref="DbParamExpression.SourceColumn"/>.</param>
/// <returns>The column of parameter expression.</returns>
public static _SqlXml Param(SqlXml x, _SqlXml sourceColumn = null)
{
return(new ParamExpression <SqlXml>(x, sourceColumn).MakeColumn <_SqlXml>());
}