From 8ea31542ed6db7c0dfb2144cd827aae48f08a94e Mon Sep 17 00:00:00 2001
From: Seun Matt <smatt382@gmail.com>
Date: Thu, 6 Jul 2017 00:17:17 +0100
Subject: [PATCH] Code Snippet for BidiMap BAEL-963 (#2204)

* added updated example codes

* updated example code StringToCharStream

* deleted StringToCharStream.java locally

* removed redundant file

* added code for apache commons collection SetUtils

* refactored example code
---
 .../commons/collections/BidiMapUnitTest.java  | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 libraries/src/test/java/com/baeldung/commons/collections/BidiMapUnitTest.java

diff --git a/libraries/src/test/java/com/baeldung/commons/collections/BidiMapUnitTest.java b/libraries/src/test/java/com/baeldung/commons/collections/BidiMapUnitTest.java
new file mode 100644
index 0000000000..64a3932fb3
--- /dev/null
+++ b/libraries/src/test/java/com/baeldung/commons/collections/BidiMapUnitTest.java
@@ -0,0 +1,49 @@
+package com.baeldung.commons.collections;
+
+import org.apache.commons.collections4.BidiMap;
+import org.apache.commons.collections4.bidimap.DualHashBidiMap;
+import org.apache.commons.collections4.bidimap.DualLinkedHashBidiMap;
+import org.apache.commons.collections4.bidimap.DualTreeBidiMap;
+import org.apache.commons.collections4.bidimap.TreeBidiMap;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Created by smatt on 03/07/2017.
+ */
+public class BidiMapUnitTest {
+
+    @Test
+    public void givenKeyValue_whenPut_thenAddEntryToMap() {
+        BidiMap<String, String> map = new DualHashBidiMap<>();
+        map.put("key1", "value1");
+        map.put("key2", "value2");
+        assertEquals(map.size(), 2);
+    }
+
+    @Test
+    public void whenInverseBidiMap_thenInverseKeyValue() {
+        BidiMap<String, String> map = new DualHashBidiMap<>();
+        map.put("key1", "value1");
+        map.put("key2", "value2");
+        BidiMap<String, String> rMap = map.inverseBidiMap();
+        assertTrue(rMap.containsKey("value1") && rMap.containsKey("value2"));
+    }
+
+    @Test
+    public void givenValue_whenRemoveValue_thenRemoveMatchingMapEntry() {
+        BidiMap<String, String> map = new DualHashBidiMap<>();
+        map.put("key1", "value1");
+        map.put("key2", "value2");
+        map.removeValue("value2");
+        assertFalse(map.containsKey("key2"));
+    }
+
+    @Test
+    public void givenValue_whenGetKey_thenMappedKey() {
+        BidiMap<String, String> map = new DualHashBidiMap<>();
+        map.put("key1", "value1");
+        assertEquals(map.getKey("value1"), "key1");
+    }
+}