### Question:
StringUtils { public static String capitalize(String aValue) { return aValue.length() > 0 ? aValue.substring(0, 1).toUpperCase() + aValue.substring(1) : aValue; }  static String join(String separator, String... parts); static String[] toStringArray(Object... args); static Set<String> split(String aSource, String aDelimiter); static String replaceUnsupportedSymbols(String str); static String replaceFileNamesInvalidCharacters(String str); static Integer parseInt(String str, Integer defaultValue); static String formatDouble(double aValue); static String capitalize(String aValue); static String readReader(Reader aReader, int length);  }### Answer:
@Test public void testCapitalizeStabilityProperty(){ String propName = "x"; String methodName = "get"+StringUtils.capitalize(propName); String propName1 = Introspector.decapitalize(methodName.substring(3)); assertEquals(propName, propName1); String _propName = "XYZ"; String _methodName = "get"+StringUtils.capitalize(_propName); String _propName1 = Introspector.decapitalize(_methodName.substring(3)); assertEquals(_propName, _propName1); }
@Test public void testCapitalizeStabilityMethod(){ String methodName = "getX"; String propName = Introspector.decapitalize(methodName.substring(3)); String methodName1 = "get"+StringUtils.capitalize(propName); assertEquals(methodName, methodName1); String _methodName = "getXYZ"; String _propName = Introspector.decapitalize(_methodName.substring(3)); String _methodName1 = "get"+StringUtils.capitalize(_propName); assertEquals(_methodName, _methodName1); }