Adding case with private static method and instance method

src/class-elements/static-private-method-and-instance-method-brand-check.case

@@ -0,0 +1,60 @@
+// Copyright (C) 2019 Caio Lima (Igalia SL). All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+desc: Brand for static private names and instance private names are different
+info: |
+  ClassTail : ClassHeritage { ClassBody }
+    ...
+    32. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that P's [[Kind]] field is either "method" or "accessor" and P's [[Brand]] field is proto,
+      a. Set F.[[PrivateBrand]] to proto.
+    33. If PrivateBoundIdentifiers of ClassBody contains a Private Name P such that P's [[Kind]] field is either "method" or "accessor" and P's [[Brand]] is F,
+      a. PrivateBrandAdd(F, F).
+    ...
+
+  PrivateFieldGet (P, O)
+    1. Assert: P is a Private Name.
+    2. If O is not an object, throw a TypeError exception.
+    3. If P.[[Kind]] is "field",
+    ...
+    4. Perform ? PrivateBrandCheck(O, P).
+    5. If P.[[Kind]] is "method",
+      a. Return P.[[Value]].
+    ...
+
+  PrivateBrandCheck(O, P)
+    1. If O.[[PrivateBrands]] does not contain an entry e such that SameValue(e, P.[[Brand]]) is true,
+      a. Throw a TypeError exception.
+template: default
+features: [class-static-methods-private]
+---*/
+
+//- elements
+static #f() {
+  return 'static';
+}
+
+static access() {
+  return this.#f();
+}
+
+#instanceMethod() {
+  return 'instance';
+}
+
+instanceAccess() {
+  return this.#instanceMethod();
+}
+//- assertions
+let c = new C();
+assert.sameValue(C.access(), 'static');
+assert.sameValue(c.instanceAccess(), 'instance');
+
+assert.throws(TypeError, function() {
+  C.access.call(c);
+}, 'Accessed static private method from instance of C');
+
+assert.throws(TypeError, function() {
+  c.instanceAccess.call(C);
+}, 'Accessed instance private method from C');
+