### Question:
Util { public static String stripFileExtension(String fileName) { int dotInd = fileName.lastIndexOf('.'); return (dotInd > 0) ? fileName.substring(0, dotInd) : fileName; }  static File toFile(URL url); static String stringFromFile(File file); static String stringFromFile(File file, String joinWith); static String join(Iterable<?> objects, String separator); static String substBackslashes(String string); static Throwable unwindException(Throwable th); static boolean nullSafeEquals(Object o1, Object o2); static int nullSafeCompare(boolean nullsFirst, Comparable<T> o1, T o2); static boolean isEmptyString(CharSequence string); static boolean isBlank(CharSequence cs); static boolean isNumeric(CharSequence cs); static int countMatches(final String str, final String sub); static String capitalized(String name); static String uncapitalized(String aString); @SuppressWarnings("unchecked") static T cloneViaSerialization(T object); static XMLReader createXmlReader(); static Document readDocument(URL url); static String getPackagePath(String className); static String stripPackageName(String className); static Map<K, V> toMap(K[] keys, V[] values); static String extractFileExtension(String fileName); static String stripFileExtension(String fileName); static String stripLineBreaks(String string, char replaceWith); static String encodeXmlAttribute(String string); static String prettyTrim(String str, int maxLength); static Iterator<T> sortedIterator(Iterator<T> it, Comparator<T> comparator); static int hashCode(Collection<?> c); static Pattern sqlPatternToPattern(String pattern, boolean ignoreCase); static boolean isAccessible(Member member); @Deprecated static Class<?> getJavaClass(String className); static String underscoredToJava(String name, boolean capitalize); static String specialCharsToJava(String string);  }### Answer:
@Test public void testStripFileExtension1() throws Exception { String fullName = "n.ext"; assertEquals("n", Util.stripFileExtension(fullName)); }
@Test public void testStripFileExtension2() throws Exception { String fullName = "n"; assertEquals("n", Util.stripFileExtension(fullName)); }
@Test public void testStripFileExtension3() throws Exception { String fullName = ".ext"; assertEquals(".ext", Util.stripFileExtension(fullName)); }