### Question:
ClassLoaderWrapper { public InputStream getResourceAsStream(String resource) { return getResourceAsStream(resource, getClassLoaders(null)); } ClassLoaderWrapper(); URL getResourceAsURL(String resource); URL getResourceAsURL(String resource, ClassLoader classLoader); InputStream getResourceAsStream(String resource); InputStream getResourceAsStream(String resource, ClassLoader classLoader); Class<?> classForName(String name); Class<?> classForName(String name, ClassLoader classLoader);  }### Answer:
@Test void getResourceAsStream() { assertNotNull(wrapper.getResourceAsStream(JPETSTORE_PROPERTIES)); }
@Test void getResourceAsStreamNotFound() { assertNull(wrapper.getResourceAsStream(RESOURCE_NOT_FOUND)); }
@Test void getResourceAsStreamWithClassLoader() { assertNotNull(wrapper.getResourceAsStream(JPETSTORE_PROPERTIES, loader)); }
@Test public void getResourceAsStream() { assertNotNull(wrapper.getResourceAsStream(JPETSTORE_PROPERTIES)); }
@Test public void getResourceAsStreamNotFound() { assertNull(wrapper.getResourceAsStream(RESOURCE_NOT_FOUND)); }
@Test public void getResourceAsStreamWithClassLoader() { assertNotNull(wrapper.getResourceAsStream(JPETSTORE_PROPERTIES, loader)); }