add more passing tests

javascript/ql/test/library-tests/Generators/generators.js

@@ -14,4 +14,20 @@
     return source;
   }
   sink(gen2()); // OK
+
+  Array.from(gen1()).forEach(x => sink(x)); // NOT OK
+
+  function gen3() {
+    yield source;
+  }
+  Array.from(gen3()).forEach(x => sink(x)); // NOT OK
+
+  function *gen4() {
+    throw source;
+  }
+  try {
+    Array.from(gen4());
+  } catch (e) {
+    sink(e); // NOT OK
+  }
 });