### Question:
RadixNode { public int getMatchLength(String input){ int matchLength = 0; if (input == null){ return 0; } while(matchLength < key.length() && matchLength < input.length() && input.charAt(matchLength) == key.charAt(matchLength)){ matchLength += 1; } return matchLength; } RadixNode(); String getKey(); void setKey(String key); List<RadixNode<T>> getChildren(); void setChildren(List<RadixNode<T>> children); boolean isTerminal(); void setTerminal(boolean isTerminalNew); boolean isRoot(); Collection<T> getValues(); void setValues(Collection<T> newValues); void addValue(T value); void removeValue(T value); void removeAll(); boolean containsValue(T value); int getMatchLength(String input); boolean matches(String input, FalconRadixUtils.INodeAlgorithm matcher);  }### Answer:
@Test public void testMatchingWithRoot(){ String inputKey = "/data/cas/"; Assert.assertEquals(rootNode.getMatchLength(inputKey), 0); }
@Test public void testEmptyMatchingWithRoot(){ String inputKey = ""; Assert.assertEquals(rootNode.getMatchLength(inputKey), 0); }
@Test public void testNullMatchingWithRoot(){ Assert.assertEquals(rootNode.getMatchLength(null), 0); }
@Test public void testDistinctStringMatching(){ String inputKey = "data/cas"; Assert.assertEquals(normalNode.getMatchLength(inputKey), 0); }
@Test public void testSameStringMatching(){ String inputKey = "/data/cas"; Assert.assertEquals(normalNode.getMatchLength(inputKey), 9); }
@Test public void testNullStringMatching(){ Assert.assertEquals(normalNode.getMatchLength(null), 0); }