### Question:
ClassNameUtils { public static String internalToSource(String internalName) { StringBuilder sourceName = new StringBuilder(); String baseClass = getComponentBase(internalName); String binaryPrimitive = internalPrimitiveToBinaryName.get(baseClass); if (binaryPrimitive != null) { sourceName.append(binaryPrimitive); } else { sourceName.append(baseClass.substring(1, baseClass.length() - 1).replace('/', '.')); } int dimensions = ClassNameUtils.getDimensionCount(internalName); for (int i = 0; i < dimensions; i++) { sourceName.append("[]"); } return sourceName.toString(); }  static String binaryToInternal(String binaryName); static String getComponentBase(String className); static String getComponentType(String className); static int getDimensionCount(String className); static String getPackageName(String className); static @Nullable String getPrimitive(String className); static Class<?> getPrimitiveClass(String className); static @Nullable String getWrapper(String className); static String internalToBinary(String internalName); static String internalToSource(String internalName); static boolean isObject(String type); static boolean isPrimitive(String className); static boolean isPrimitiveOrWrapper(String className); static boolean isWrapper(String className); static String sourceToBinary(String sourceName); static String sourceToInternal(String sourceName); static String toFormat(String className, TypeFormat format); static String toInternal(Class<?> klazz); static List<String> toInternal(Class<?>... classes); static ReferenceType guessReferenceType(@Nonnull String s);  }### Answer:
@Test public void canConvertInternalToSource() { for (Entry<String, String> entry : internalNameToSourceName.entrySet()) { String className = entry.getKey(); String expected = entry.getValue(); String actual = ClassNameUtils.internalToSource(className); assertEquals(expected, actual); } }