@@ -0,0 +1,1435 @@
+/*%0A * Copyright (C) 2014 Pedro Vicente G%C3%B3mez S%C3%A1nchez.%0A *%0A * Licensed under the Apache License, Version 2.0 (the %22License%22);%0A * you may not use this file except in compliance with the License.%0A * You may obtain a copy of the License at%0A *%0A * http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0Apackage com.github.pedrovgs.problem72;%0A%0Aimport org.junit.Before;%0Aimport org.junit.Test;%0A%0Aimport static org.junit.Assert.assertEquals;%0A%0A/**%0A * @author Pedro Vicente G%C3%B3mez S%C3%A1nchez.%0A */%0Apublic class FindTheMissingNumberTest %7B%0A%0A  private FindTheMissingNumber findMissingNumber;%0A%0A  @Before public void setUp() %7B%0A    findMissingNumber = new FindTheMissingNumber();%0A  %7D%0A%0A  @Test(expected = IllegalArgumentException.class) public void shouldNotAcceptNullInstances() %7B%0A    findMissingNumber.find(null);%0A  %7D%0A%0A  @Test(expected = IllegalArgumentException.class) public void shouldNotAcceptEmptyArrays() %7B%0A    findMissingNumber.find(new int%5B0%5D);%0A  %7D%0A%0A  @Test public void shouldFindMissingNumber() %7B%0A    int%5B%5D numbers = %7B 0, 1, 2, 4 %7D;%0A%0A    int missingNumber = findMissingNumber.find(numbers);%0A%0A    assertEquals(3, missingNumber);%0A  %7D%0A%7D%0A

Add some test to problem 72