BAEL-972 - Apache Commons Text (#2186)

* Evaluation article: Different Types of Bean Injection in Spring

* added tests & changed configuration to Java-based config

* removed xml config files

* rename unit tests

* BAEL-972 - Apache Commons Text

* remove code from evaluation article

* remove code from evaluation article

* BAEL-972 - Apache Commons Text - added another example

libraries/src/test/java/com/baeldung/text/UnicodeEscaperTest.java

@@ -0,0 +1,16 @@
+package com.baeldung.text;
+
+import org.apache.commons.text.translate.UnicodeEscaper;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class UnicodeEscaperTest {
+
+    @Test
+    public void whenTranslate_thenCorrect() {
+        UnicodeEscaper ue = UnicodeEscaper.above(0);
+        String result = ue.translate("ABCD");
+
+        Assert.assertEquals("\\u0041\\u0042\\u0043\\u0044", result);
+    }
+}