public void Transform_ArgumentIsNull()
{
var method = typeof(string).GetMethod("StartsWith", new[] { typeof(string) });
var objectExpression = Expression.Constant("Test");
var argument1 = Expression.Constant(null, typeof(string));
var expression = Expression.Call(objectExpression, method, argument1);
var transformer = new StartsWithMethodCallTransformer();
var result = transformer.Transform(expression);
SqlExpressionTreeComparer.CheckAreEqualTrees(Expression.Constant(false), result);
}
public void Transform_ArgumentIsNotNull()
{
var method = typeof(string).GetMethod("StartsWith", new[] { typeof(string) });
var objectExpression = Expression.Constant("Test");
var argument1 = Expression.Constant("test");
var expression = Expression.Call(objectExpression, method, argument1);
var transformer = new StartsWithMethodCallTransformer();
var result = transformer.Transform(expression);
var rightExpression = Expression.Constant(string.Format("{0}%", argument1.Value));
var expectedResult = new SqlLikeExpression(objectExpression, rightExpression, new SqlLiteralExpression(@"\"));
SqlExpressionTreeComparer.CheckAreEqualTrees(expectedResult, result);
}
public void Transform_ArgumentIsNotNullAndIsNoConstantValue_()
{
var method = typeof(string).GetMethod("StartsWith", new[] { typeof(string) });
var objectExpression = Expression.Constant("Test");
var argument1 = Expression.MakeMemberAccess(Expression.Constant(new Cook()), typeof(Cook).GetProperty("Name"));
var expression = Expression.Call(objectExpression, method, argument1);
var transformer = new StartsWithMethodCallTransformer();
var result = transformer.Transform(expression);
Expression rightExpression = new SqlFunctionExpression(
typeof(string),
"REPLACE",
new SqlFunctionExpression(
typeof(string),
"REPLACE",
new SqlFunctionExpression(
typeof(string),
"REPLACE",
new SqlFunctionExpression(
typeof(string),
"REPLACE",
argument1,
new SqlLiteralExpression(@"\"),
new SqlLiteralExpression(@"\\")),
new SqlLiteralExpression(@"%"),
new SqlLiteralExpression(@"\%")),
new SqlLiteralExpression(@"_"),
new SqlLiteralExpression(@"\_")),
new SqlLiteralExpression(@"["),
new SqlLiteralExpression(@"\["));
rightExpression = Expression.Add(
rightExpression, new SqlLiteralExpression("%"), typeof(string).GetMethod("Concat", new[] { typeof(string), typeof(string) }));
var expectedResult = new SqlLikeExpression(objectExpression, rightExpression, new SqlLiteralExpression(@"\"));
SqlExpressionTreeComparer.CheckAreEqualTrees(expectedResult, result);
}