From 409f252b0ea6df2ad791c6ac615efdbe37dfa25b Mon Sep 17 00:00:00 2001
From: DOHA <dohae243@gmail.com>
Date: Sat, 1 Sep 2018 21:57:20 +0300
Subject: [PATCH] remove emojis

---
 java-strings/pom.xml                          |  7 ++
 .../RemovingEmojiFromStringUnitTest.java      | 78 +++++++++++++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 java-strings/src/test/java/com/baeldung/string/RemovingEmojiFromStringUnitTest.java

diff --git a/java-strings/pom.xml b/java-strings/pom.xml
index 86b8924c4b..0c83b4d9e7 100644
--- a/java-strings/pom.xml
+++ b/java-strings/pom.xml
@@ -52,6 +52,13 @@
             <artifactId>icu4j</artifactId>
             <version>${icu4j.version}</version>
         </dependency>
+        
+        <dependency>
+            <groupId>com.vdurmont</groupId>
+            <artifactId>emoji-java</artifactId>
+            <version>4.0.0</version>
+        </dependency>
+        
     </dependencies>
 
     <build>
diff --git a/java-strings/src/test/java/com/baeldung/string/RemovingEmojiFromStringUnitTest.java b/java-strings/src/test/java/com/baeldung/string/RemovingEmojiFromStringUnitTest.java
new file mode 100644
index 0000000000..163f28d0d8
--- /dev/null
+++ b/java-strings/src/test/java/com/baeldung/string/RemovingEmojiFromStringUnitTest.java
@@ -0,0 +1,78 @@
+package com.baeldung.string;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.CoreMatchers.not;
+import static org.junit.Assert.assertThat;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.junit.Test;
+
+import com.vdurmont.emoji.EmojiParser;
+
+public class RemovingEmojiFromStringUnitTest {
+    String text = "la conférence, commencera à 10 heures 😅 ✿";
+    String regex = "[^\\p{L}\\p{N}\\p{P}\\p{Z}]";
+
+    @Test
+    public void whenRemoveEmojiUsingLibrary_thenSuccess() {
+        String result = EmojiParser.removeAllEmojis(text);
+        System.out.println(result);
+        assertThat(result, not(containsString("😅")));
+        assertThat(result, containsString("à"));
+        assertThat(result, containsString("la"));
+        assertThat(result, containsString("10"));
+    }
+    
+    @Test
+    public void whenReplaceEmojiUsingLibrary_thenSuccess() {
+        String result = EmojiParser.parseToAliases(text);
+        System.out.println(result);
+        assertThat(result, not(containsString("😅")));
+        assertThat(result, containsString("sweat_smile"));
+    }
+
+    @Test
+    public void whenRemoveEmojiUsingRegex_thenSuccess() {
+        String result = text.replaceAll(regex, "");
+        System.out.println(result);
+        assertThat(result, not(containsString("😅")));
+        assertThat(result, containsString("à"));
+        assertThat(result, containsString("la"));
+        assertThat(result, containsString("10"));
+    }
+
+    @Test
+    public void whenRemoveEmojiUsingMatcher_thenSuccess() {
+        Pattern pattern = Pattern.compile(regex, Pattern.UNICODE_CHARACTER_CLASS);
+        Matcher matcher = pattern.matcher(text);
+        
+        String result = matcher.replaceAll("");
+        System.out.println(result);
+        assertThat(result, not(containsString("😅")));
+        assertThat(result, containsString("à"));
+        assertThat(result, containsString("la"));
+        assertThat(result, containsString("10"));
+    }
+
+    @Test
+    public void whenRemoveEmojiUsingCodepoints_thenSuccess() {
+        String result = text.replaceAll("[\\x{0001f300}-\\x{0001f64f}]|[\\x{0001f680}-\\x{0001f6ff}]", "");
+        System.out.println(result);
+        assertThat(result, not(containsString("😅")));
+        assertThat(result, containsString("à"));
+        assertThat(result, containsString("la"));
+        assertThat(result, containsString("10"));
+    }
+
+    @Test
+    public void whenRemoveEmojiUsingUnicode_thenSuccess() {
+        String result = text.replaceAll("[\ud83c\udf00-\ud83d\ude4f]|[\ud83d\ude80-\ud83d\udeff]", "");
+        System.out.println(result);
+        assertThat(result, not(containsString("😅")));
+        assertThat(result, containsString("à"));
+        assertThat(result, containsString("la"));
+        assertThat(result, containsString("10"));
+    }
+}