C#: Add generic attribute test and expected results.

Author: michaelnebel

csharp/ql/test/library-tests/csharp11/GenericAttribute.cs

@@ -0,0 +1,23 @@
+using System;
+
+[assembly: MyGenericAttribute<int>()]
+[module: MyGeneric2<object, object>()]
+
+public class MyGenericAttribute<T> : Attribute { }
+public class MyGeneric2Attribute<T, U> : Attribute { }
+
+public class TestGenericAttribute
+{
+
+    [MyGenericAttribute<int>()]
+    public void M1() { }
+
+    [MyGeneric<string>()]
+    public void M2() { }
+
+    [MyGeneric2<int, string>()]
+    public void M3() { }
+
+    [return: MyGeneric<object>()]
+    public int M4() { return 0; }
+}

csharp/ql/test/library-tests/csharp11/genericAttribute.expected

@@ -0,0 +1,6 @@
+| GenericAttribute.cs:3:12:3:34 | [assembly: MyGeneric<Int32>(...)] | MyGenericAttribute<Int32> | 1 | (Int32) | GenericAssemblyAttribute |
+| GenericAttribute.cs:4:10:4:35 | [module: MyGeneric2<Object,Object>(...)] | MyGeneric2Attribute<Object,Object> | 2 | (Object) | GenericModuleAttribute |
+| GenericAttribute.cs:12:6:12:28 | [MyGeneric<Int32>(...)] | MyGenericAttribute<Int32> | 1 | (Int32) | GenericDefaultAttribute |
+| GenericAttribute.cs:15:6:15:22 | [MyGeneric<String>(...)] | MyGenericAttribute<String> | 1 | (String) | GenericDefaultAttribute |
+| GenericAttribute.cs:18:6:18:28 | [MyGeneric2<Int32,String>(...)] | MyGeneric2Attribute<Int32,String> | 2 | (Int32,String) | GenericDefaultAttribute |
+| GenericAttribute.cs:21:14:21:30 | [return: MyGeneric<Object>(...)] | MyGenericAttribute<Object> | 1 | (Object) | GenericReturnAttribute |

csharp/ql/test/library-tests/csharp11/genericAttribute.ql

@@ -0,0 +1,10 @@
+import csharp
+
+private string getTypeArguments(GenericAttribute a) {
+  result = "(" + concat(Type t | t = a.getATypeArgument() | t.getName(), ",") + ")"
+}
+
+from GenericAttribute a
+where a.getFile().getStem() = "GenericAttribute"
+select a, a.getType().getName(), a.getNumberOfTypeArguments(), getTypeArguments(a),
+  a.getAPrimaryQlClass()