Add memberexpression and call expression forms to access private names

src/class-elements/private-methods/cls-decl.template

@@ -90,6 +90,7 @@ class C {
     hasProp(this, '#m', false, 'private methods are defined in an special internal slot and cannot be found as own properties');
     assert.sameValue(typeof this.#m, 'function');
     assert.sameValue(this.ref, this.#m, 'returns the same value');
+    assert.sameValue(this.#m, (() => this)().#m, 'memberexpression and call expression forms');
 
     /*{ constructor }*/
   }

src/class-elements/private-methods/cls-expr.template

@@ -91,6 +91,7 @@ var C = class {
     hasProp(this, '#m', false, 'private methods are defined in an special internal slot and cannot be found as own properties');
     assert.sameValue(typeof this.#m, 'function');
     assert.sameValue(this.ref, this.#m, 'returns the same value');
+    assert.sameValue(this.#m, (() => this)().#m, 'memberexpression and call expression forms');
 
     /*{ constructor }*/
   }