@@ -0,0 +1,2059 @@
+/*%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.problem43;%0A%0Aimport java.util.HashSet;%0Aimport java.util.LinkedHashSet;%0Aimport java.util.Set;%0Aimport org.junit.Before;%0Aimport org.junit.Test;%0A%0Aimport static org.junit.Assert.assertTrue;%0A%0A/**%0A * @author Pedro Vicente G%C3%B3mez S%C3%A1nchez.%0A */%0Apublic class CombinationOfIntegersTest %7B%0A%0A  private CombinationOfIntegers combinationOfIntegers;%0A%0A  @Before public void setUp() %7B%0A    combinationOfIntegers = new CombinationOfIntegers();%0A  %7D%0A%0A  @Test(expected = IllegalArgumentException.class)%0A  public void shouldNotAcceptNullInstancesAsInput() %7B%0A    combinationOfIntegers.calculate(null);%0A  %7D%0A%0A  @Test public void shouldJustContainEmptySetIfInputSetIsEmpty() %7B%0A    Set%3CInteger%3E input = new HashSet%3CInteger%3E();%0A%0A    Set%3CSet%3CInteger%3E%3E result = combinationOfIntegers.calculate(input);%0A%0A    assertSetContainsSet(result);%0A  %7D%0A%0A  @Test public void shouldCalculateEveryCombination() %7B%0A    Set%3CInteger%3E input = new HashSet%3CInteger%3E();%0A    input.add(1);%0A    input.add(2);%0A%0A    Set%3CSet%3CInteger%3E%3E result = combinationOfIntegers.calculate(input);%0A%0A    assertSetContainsSet(result);%0A    assertSetContainsSet(result, 1);%0A    assertSetContainsSet(result, 2);%0A    assertSetContainsSet(result, 1, 2);%0A  %7D%0A%0A  private void assertSetContainsSet(Set%3CSet%3CInteger%3E%3E result, int... elements) %7B%0A    Set%3CInteger%3E expected = new LinkedHashSet%3CInteger%3E();%0A    for (int i : elements) %7B%0A      expected.add(i);%0A    %7D%0A    assertTrue(result.contains(expected));%0A  %7D%0A%7D%0A

Add some tests to problem 43