@TestOnly public static void checkInjectorsAreDisposed(@NotNull Project project) { InjectedLanguageManagerImpl cachedManager = (InjectedLanguageManagerImpl) project.getUserData(INSTANCE_CACHE); if (cachedManager == null) { return; } try { ClassMapCachingNulls<MultiHostInjector> cached = cachedManager.cachedInjectors; if (cached == null) return; for (Map.Entry<Class, MultiHostInjector[]> entry : cached.getBackingMap().entrySet()) { Class key = entry.getKey(); if (cachedManager.myInjectorsClone.isEmpty()) return; MultiHostInjector[] oldInjectors = cachedManager.myInjectorsClone.get(key); for (MultiHostInjector injector : entry.getValue()) { if (ArrayUtil.indexOf(oldInjectors, injector) == -1) { throw new AssertionError("Injector was not disposed: " + key + " -> " + injector); } } } } finally { cachedManager.myInjectorsClone.clear(); } }