C#: Extractor test for join ... into

Author: calumgrant

csharp/ql/test/library-tests/linq/Linq1.expected

@@ -17,21 +17,21 @@
 | queries.cs:18:21:21:28 | call to method Select | 1 | queries.cs:21:18:21:27 | (...) => ... |
 | queries.cs:25:11:25:21 | call to method SelectMany | 0 | queries.cs:24:11:24:25 | IList<Int32> a = ... |
 | queries.cs:25:11:25:21 | call to method SelectMany | 1 | queries.cs:25:11:25:21 | IList<Int32> b = ... |
-| queries.cs:25:11:25:21 | call to method SelectMany | 2 | queries.cs:25:21:25:21 | access to local variable a |
+| queries.cs:25:11:25:21 | call to method SelectMany | 3 | queries.cs:25:21:25:21 | access to local variable a |
 | queries.cs:26:11:26:26 | call to method Select | 0 | queries.cs:25:11:25:21 | call to method SelectMany |
 | queries.cs:26:11:26:26 | call to method Select | 1 | queries.cs:26:11:26:26 | Int32 next = ... |
-| queries.cs:26:11:26:26 | call to method Select | 2 | queries.cs:26:22:26:26 | ... + ... |
+| queries.cs:26:11:26:26 | call to method Select | 3 | queries.cs:26:22:26:26 | ... + ... |
 | queries.cs:27:11:27:42 | call to method Join | 0 | queries.cs:26:11:26:26 | call to method Select |
 | queries.cs:27:11:27:42 | call to method Join | 1 | queries.cs:27:11:27:42 | IList<Int32> c = ... |
-| queries.cs:27:11:27:42 | call to method Join | 2 | queries.cs:27:21:27:25 | access to local variable list1 |
-| queries.cs:27:11:27:42 | call to method Join | 3 | queries.cs:27:30:27:33 | access to local variable next |
-| queries.cs:27:11:27:42 | call to method Join | 4 | queries.cs:27:42:27:42 | access to local variable c |
+| queries.cs:27:11:27:42 | call to method Join | 3 | queries.cs:27:21:27:25 | access to local variable list1 |
+| queries.cs:27:11:27:42 | call to method Join | 4 | queries.cs:27:30:27:33 | access to local variable next |
+| queries.cs:27:11:27:42 | call to method Join | 5 | queries.cs:27:42:27:42 | access to local variable c |
 | queries.cs:32:11:32:21 | call to method SelectMany | 0 | queries.cs:31:11:31:25 | IList<Int32> a = ... |
 | queries.cs:32:11:32:21 | call to method SelectMany | 1 | queries.cs:32:11:32:21 | IList<Int32> b = ... |
-| queries.cs:32:11:32:21 | call to method SelectMany | 2 | queries.cs:32:21:32:21 | access to local variable a |
+| queries.cs:32:11:32:21 | call to method SelectMany | 3 | queries.cs:32:21:32:21 | access to local variable a |
 | queries.cs:33:11:33:26 | call to method Select | 0 | queries.cs:32:11:32:21 | call to method SelectMany |
 | queries.cs:33:11:33:26 | call to method Select | 1 | queries.cs:33:11:33:26 | Int32 next = ... |
-| queries.cs:33:11:33:26 | call to method Select | 2 | queries.cs:33:22:33:26 | ... + ... |
+| queries.cs:33:11:33:26 | call to method Select | 3 | queries.cs:33:22:33:26 | ... + ... |
 | queries.cs:34:11:34:37 | call to method OrderByDescending | 0 | queries.cs:33:11:33:26 | call to method Select |
 | queries.cs:34:11:34:37 | call to method OrderByDescending | 1 | queries.cs:34:19:34:26 | ... * ... |
 | queries.cs:35:11:35:25 | call to method GroupBy | 0 | queries.cs:34:11:34:37 | call to method OrderByDescending |
@@ -43,3 +43,9 @@
 | queries.cs:47:11:47:18 | call to method Select | 1 | queries.cs:47:18:47:18 | access to local variable a |
 | queries.cs:51:11:51:18 | call to method Select | 0 | queries.cs:50:11:50:32 | String a = ... |
 | queries.cs:51:11:51:18 | call to method Select | 1 | queries.cs:51:18:51:18 | access to local variable a |
+| queries.cs:55:11:55:49 | call to method GroupJoin | 0 | queries.cs:54:11:54:25 | Int32 a = ... |
+| queries.cs:55:11:55:49 | call to method GroupJoin | 1 | queries.cs:55:11:55:49 | IList<IList<Int32>> c = ... |
+| queries.cs:55:11:55:49 | call to method GroupJoin | 2 | queries.cs:55:11:55:49 | IList<IList<Int32>> d = ... |
+| queries.cs:55:11:55:49 | call to method GroupJoin | 3 | queries.cs:55:21:55:25 | access to local variable list2 |
+| queries.cs:55:11:55:49 | call to method GroupJoin | 4 | queries.cs:55:30:55:30 | access to local variable a |
+| queries.cs:55:11:55:49 | call to method GroupJoin | 5 | queries.cs:55:39:55:42 | access to indexer |

csharp/ql/test/library-tests/linq/queries.cs

@@ -49,6 +49,11 @@ from a in list9
         var list11 =
           from string a in list7
           select a;
+        
+        var list12 = 
+          from a in list1
+          join c in list2 on a equals c[0] into d
+          select (a,d);
     }
 
     class A : System.Collections.IEnumerable