SubstringMethodCallTransformer implements IMethodCallTransformer for the string.Substring(int) methods.
Inheritance: IMethodCallTransformer
SubstringMethodCallTransformer Class Documentation
Example #1
0
    public void Transform_WithTwoArgument ()
    {
      var method = typeof (string).GetMethod ("Substring", new[] { typeof (int), typeof (int) });
      var objectExpression = Expression.Constant ("Test");
      var expression = Expression.Call (objectExpression, method, Expression.Constant (1), Expression.Constant (3));

      var transformer = new SubstringMethodCallTransformer();
      var result = transformer.Transform (expression);

      var expectedResult = new SqlFunctionExpression (
          expression.Type,
          "SUBSTRING",
          objectExpression,
          Expression.Add (Expression.Constant (1), new SqlLiteralExpression (1)),
          Expression.Constant (3)
          );

      SqlExpressionTreeComparer.CheckAreEqualTrees (expectedResult, result);
    }