### Question:
AndroidClassLoadingStrategy implements ClassLoadingStrategy<ClassLoader> { public Map<TypeDescription, Class<?>> load(ClassLoader classLoader, Map<TypeDescription, byte[]> types) { DexProcessor.Conversion conversion = dexProcessor.create(); for (Map.Entry<TypeDescription, byte[]> entry : types.entrySet()) { conversion.register(entry.getKey().getName(), entry.getValue()); } File jar = new File(privateDirectory, randomString.nextString() + JAR_FILE_EXTENSION); try { if (!jar.createNewFile()) { throw new IllegalStateException("Cannot create " + jar); } JarOutputStream zipOutputStream = new JarOutputStream(new FileOutputStream(jar)); try { zipOutputStream.putNextEntry(new JarEntry(DEX_CLASS_FILE)); conversion.drainTo(zipOutputStream); zipOutputStream.closeEntry(); } finally { zipOutputStream.close(); } return doLoad(classLoader, types.keySet(), jar); } catch (IOException exception) { throw new IllegalStateException("Cannot write to zip file " + jar, exception); } finally { if (!jar.delete()) { Logger.getLogger("net.bytebuddy").warning("Could not delete " + jar); } } } protected  AndroidClassLoadingStrategy(File privateDirectory, DexProcessor dexProcessor); Map<TypeDescription, Class<?>> load(ClassLoader classLoader, Map<TypeDescription, byte[]> types);  }### Answer:
@Test(expected = IllegalArgumentException.class) public void testInjectBootstrapLoader() throws Exception { File file = mock(File.class); when(file.isDirectory()).thenReturn(true); new StubbedClassLoadingStrategy.Injecting(file, mock(AndroidClassLoadingStrategy.DexProcessor.class)) .load(ClassLoadingStrategy.BOOTSTRAP_LOADER, Collections.<TypeDescription, byte[]>emptyMap()); }