C#: Add test case for record class and record structs.

Author: michaelnebel

csharp/ql/test/library-tests/csharp10/RecordTypes.cs

@@ -3,4 +3,10 @@
 public record MyEntry(string Name, string Address)
 {
     sealed public override string ToString() => $"{Name} lives at {Address}";
-};
+};
+
+public record class MyClassRecord(DateTime stuff) { }
+
+public readonly record struct MyReadonlyRecordStruct(string Stuff) { }
+
+public record struct MyRecordStruct(int Stuff) { }

csharp/ql/test/library-tests/csharp10/recordTypes.expected

@@ -0,0 +1,11 @@
+recordTypes
+| RecordTypes.cs:3:1:6:2 | MyEntry |
+| RecordTypes.cs:8:1:8:53 | MyClassRecord |
+| RecordTypes.cs:10:1:10:70 | MyReadonlyRecordStruct |
+| RecordTypes.cs:12:1:12:50 | MyRecordStruct |
+recordStructs
+| RecordTypes.cs:10:1:10:70 | MyReadonlyRecordStruct |
+| RecordTypes.cs:12:1:12:50 | MyRecordStruct |
+recordClass
+| RecordTypes.cs:3:1:6:2 | MyEntry |
+| RecordTypes.cs:8:1:8:53 | MyClassRecord |

csharp/ql/test/library-tests/csharp10/recordTypes.ql

@@ -0,0 +1,7 @@
+import csharp
+
+query predicate recordTypes(RecordType rt) { any() }
+
+query predicate recordStructs(RecordStruct rs) { any() }
+
+query predicate recordClass(RecordClass r) { any() }