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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
namespace System.Data.Entity.Query.LinqToEntities
{
using System.Collections.Generic;
using System.Data.Entity.Infrastructure;
using System.Linq;
using Xunit;
public enum Genre
{
Action,
Humor,
Fantasy,
}
public class Book
{
public int Id { get; set; }
public string Title { get; set; }
public Genre? Genre { get; set; }
public AuthorName Author { get; set; }
}
public class AuthorName
{
public string First { get; set; }
public string Last { get; set; }
}
public class EnumerableContainsTests : FunctionalTestBase
{
public class UnicodeContext : DbContext
{
public DbSet<Book> Books { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Book>().Property(p => p.Title).IsUnicode(true);
}
}
public class NonUnicodeContext : DbContext
{
public DbSet<Book> Books { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Book>().Property(p => p.Title).IsUnicode(false);
}
}
[Fact]
public static void EnumerableContains_with_unicode_string_and_store_null_is_translated_to_expected_sql()
{
const string expectedSql =
@"SELECT
[Extent1].[Id] AS [Id]
FROM [dbo].[Books] AS [Extent1]
WHERE ([Extent1].[Title] IN (N'Title1', N'Title2'))
OR ([Extent1].[Title] IS NULL)";
var array = new[] { "Title1", "Title2", null };
using (var context = new UnicodeContext())
{
((IObjectContextAdapter)context).ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior = false;
var query = from book in context.Books
where array.Contains(book.Title)
select book.Id;
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
}
}
[Fact]
public static void EnumerableContains_with_unicode_string_and_csharp_null_is_translated_to_expected_sql()
{
const string expectedSql =
@"SELECT
[Extent1].[Id] AS [Id]
FROM [dbo].[Books] AS [Extent1]
WHERE (([Extent1].[Title] IN (N'Title1', N'Title2')) AND ([Extent1].[Title] IS NOT NULL))
OR ([Extent1].[Title] IS NULL)";
var array = new[] { "Title1", "Title2", null };
using (var context = new UnicodeContext())
{
((IObjectContextAdapter)context).ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior = true;
var query = from book in context.Books
where array.Contains(book.Title)
select book.Id;
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
}
}
[Fact]
public static void EnumerableContains_with_non_unicode_string_and_store_null_is_translated_to_expected_sql()
{
const string expectedSql =
@"SELECT
[Extent1].[Id] AS [Id]
FROM [dbo].[Books] AS [Extent1]
WHERE ([Extent1].[Title] IN ('Title1', 'Title2'))
OR ([Extent1].[Title] IS NULL)";
var array = new[] { "Title1", "Title2", null };
using (var context = new NonUnicodeContext())
{
((IObjectContextAdapter)context).ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior = false;
var query = from book in context.Books
where array.Contains(book.Title)
select book.Id;
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
}
}
[Fact]
public static void EnumerableContains_with_non_unicode_string_and_csharp_null_is_translated_to_expected_sql()
{
const string expectedSql =
@"SELECT
[Extent1].[Id] AS [Id]
FROM [dbo].[Books] AS [Extent1]
WHERE (([Extent1].[Title] IN ('Title1', 'Title2')) AND ([Extent1].[Title] IS NOT NULL))
OR ([Extent1].[Title] IS NULL)";
var array = new[] { "Title1", "Title2", null };
using (var context = new NonUnicodeContext())
{
((IObjectContextAdapter)context).ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior = true;
var query = from book in context.Books
where array.Contains(book.Title)
select book.Id;
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
}
}
[Fact]
public static void EnumerableContains_with_enum_and_store_null_is_translated_to_expected_sql()
{
const string expectedSql =
@"SELECT
[Extent1].[Id] AS [Id]
FROM [dbo].[Books] AS [Extent1]
WHERE ([Extent1].[Genre] IN (1,2))
OR ([Extent1].[Genre] IS NULL)";
var array = new[] { Genre.Humor, Genre.Fantasy, default(Genre?) };
using (var context = new UnicodeContext())
{
((IObjectContextAdapter)context).ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior = false;
var query = from book in context.Books
where array.Contains(book.Genre)
select book.Id;
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
}
}
[Fact]
public static void EnumerableContains_with_enum_and_csharp_null_is_translated_to_expected_sql()
{
const string expectedSql =
@"SELECT
[Extent1].[Id] AS [Id]
FROM [dbo].[Books] AS [Extent1]
WHERE (([Extent1].[Genre] IN (1,2)) AND ([Extent1].[Genre] IS NOT NULL))
OR ([Extent1].[Genre] IS NULL)";
var array = new[] { Genre.Humor, Genre.Fantasy, default(Genre?) };
using (var context = new UnicodeContext())
{
((IObjectContextAdapter)context).ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior = true;
var query = from book in context.Books
where array.Contains(book.Genre)
select book.Id;
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
}
}
[Fact]
public static void EnumerableContains_with_complex_type_throws_NotSupportedException()
{
var array = new[] { new AuthorName(), new AuthorName() };
using (var context = new UnicodeContext())
{
var query = from book in context.Books
where array.Contains(book.Author)
select book.Id;
Assert.Throws(typeof(NotSupportedException), () => query.ToString());
}
}
[Fact]
public static void EnumerableContains_with_parameter_and_store_null_is_translated_to_expected_sql()
{
const string expectedSql =
@"SELECT
[Extent1].[Id] AS [Id]
FROM [dbo].[Books] AS [Extent1]
WHERE ([Extent1].[Title] IN (N'Title1', N'Title2'))
OR ([Extent1].[Title] = @p__linq__0)
OR ([Extent1].[Title] IS NULL)
/*
String p__linq__0 = ""Title3""
*/";
var parameter = "Title3";
using (var context = new UnicodeContext())
{
((IObjectContextAdapter)context).ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior = false;
var query = from book in context.Books
where new[] { "Title1", "Title2", parameter, null }.Contains(book.Title)
select book.Id;
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
}
}
[Fact]
public static void EnumerableContains_with_parameter_and_csharp_null_is_translated_to_expected_sql()
{
const string expectedSql =
@"SELECT
[Extent1].[Id] AS [Id]
FROM [dbo].[Books] AS [Extent1]
WHERE (([Extent1].[Title] IN (N'Title1', N'Title2')) AND ([Extent1].[Title] IS NOT NULL))
OR (([Extent1].[Title] = @p__linq__0) AND (NOT ([Extent1].[Title] IS NULL OR @p__linq__0 IS NULL)))
OR (([Extent1].[Title] IS NULL) AND (@p__linq__0 IS NULL))
OR ([Extent1].[Title] IS NULL)
/*
String p__linq__0 = ""Title3""
*/";
var parameter = "Title3";
using (var context = new UnicodeContext())
{
((IObjectContextAdapter)context).ObjectContext.ContextOptions.UseCSharpNullComparisonBehavior = true;
var query = from book in context.Books
where new[] { "Title1", "Title2", parameter, null }.Contains(book.Title)
select book.Id;
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
}
}
[Fact]
public static void Contains_throws_for_constant_null_array()
{
using (var context = new UnicodeContext())
{
string[] names = null;
var query = context.Books.Where(b => names.Contains(b.Title));
Assert.Throws<NotSupportedException>(() => query.ToString());
}
}
[Fact]
public static void Contains_throws_for_constant_null_list()
{
using (var context = new UnicodeContext())
{
List<string> names = null;
var query = context.Books.Where(b => names.Contains(b.Title));
Assert.Throws<NotSupportedException>(() => query.ToString());
}
}
[Fact]
public static void Contains_on_non_static_collection_of_enums()
{
const string expectedSql =
@"SELECT
CASE WHEN ( EXISTS (SELECT
1 AS [C1]
FROM [dbo].[Books] AS [Extent2]
WHERE 0 = [Extent2].[Genre]
)) THEN cast(1 as bit) WHEN ( NOT EXISTS (SELECT
1 AS [C1]
FROM [dbo].[Books] AS [Extent3]
WHERE 0 = [Extent3].[Genre]
)) THEN cast(0 as bit) END AS [C1]
FROM [dbo].[Books] AS [Extent1]";
using (var context = new UnicodeContext())
{
var query = context.Books.Select(q => context.Books.Select(b => b.Genre).Contains(Genre.Action));
QueryTestHelpers.VerifyDbQuery(query, expectedSql);
}
}
}
}
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