Multi set

guava-collections/src/test/java/org/baeldung/guava/GuavaMultiSetUnitTest.java

@@ -0,0 +1,20 @@
+package org.baeldung.guava;
+
+import com.google.common.collect.HashMultiset;
+import com.google.common.collect.Multiset;
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class GuavaMultiSetUnitTest {
+
+        @Test
+        public void add_multipleValues() {
+                Multiset<String> bookStore = HashMultiset.create();
+                bookStore.add("Potter");
+                bookStore.add("Potter");
+
+                assertThat(bookStore.contains("Potter")).isTrue();
+                assertThat(bookStore.count("Potter")).isEqualTo(2);
+        }
+}