Merge pull request #9 from eugenp/master

update with origin

libraries/src/test/java/com/baeldung/eclipsecollections/ZipWithIndexUnitTest.java

@@ -0,0 +1,32 @@
+package com.baeldung.eclipsecollections;
+
+import org.assertj.core.api.Assertions;
+import org.eclipse.collections.api.list.MutableList;
+import org.eclipse.collections.api.tuple.Pair;
+import org.eclipse.collections.impl.factory.Lists;
+import org.eclipse.collections.impl.list.mutable.FastList;
+import org.eclipse.collections.impl.tuple.Tuples;
+import org.junit.Before;
+import org.junit.Test;
+
+public class ZipWithIndexUnitTest {
+
+    MutableList<Pair<String, Integer>> expectedPairs;
+
+    @SuppressWarnings("unchecked")
+    @Before
+    public void setup() {
+        Pair<String, Integer> pair1 = Tuples.pair("Porsche", 0);
+        Pair<String, Integer> pair2 = Tuples.pair("Volvo", 1);
+        Pair<String, Integer> pair3 = Tuples.pair("Toyota", 2);
+        expectedPairs = Lists.mutable.of(pair1, pair2, pair3);
+    }
+
+    @Test
+    public void whenZip_thenCorrect() {
+        MutableList<String> cars = FastList.newListWith("Porsche", "Volvo", "Toyota");
+        MutableList<Pair<String, Integer>> pairs = cars.zipWithIndex();
+
+        Assertions.assertThat(pairs).containsExactlyElementsOf(this.expectedPairs);
+    }
+}