Fix #14: add an isOnlyEmojis method

vdurmont · Feb 13, 2017 · 91281b3 · 91281b3
1 parent 107534d
commit 91281b3
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diff --git a/src/main/java/com/vdurmont/emoji/EmojiManager.java b/src/main/java/com/vdurmont/emoji/EmojiManager.java
@@ -130,6 +130,17 @@ public static boolean isEmoji(String string) {
       EMOJI_TRIE.isEmoji(string.toCharArray()).exactMatch();
   }
 
+  /**
+   * Tests if a given String only contains emojis.
+   *
+   * @param string the string to test
+   *
+   * @return true if the string only contains emojis, false else
+   */
+  public static boolean isOnlyEmojis(String string) {
+    return string != null && EmojiParser.removeAllEmojis(string).isEmpty();
+  }
+
   /**
    * Checks if sequence of chars contain an emoji.
    * @param sequence Sequence of char that may contain emoji in full or

diff --git a/src/test/java/com/vdurmont/emoji/EmojiManagerTest.java b/src/test/java/com/vdurmont/emoji/EmojiManagerTest.java
@@ -121,6 +121,42 @@ public void isEmoji_for_an_emoji_and_other_chars_returns_false() {
     assertFalse(isEmoji);
   }
 
+  @Test
+  public void isOnlyEmojis_for_an_emoji_returns_true() {
+    // GIVEN
+    String str = "😀";
+
+    // WHEN
+    boolean isEmoji = EmojiManager.isOnlyEmojis(str);
+
+    // THEN
+    assertTrue(isEmoji);
+  }
+
+  @Test
+  public void isOnlyEmojis_for_emojis_returns_true() {
+    // GIVEN
+    String str = "😀😀😀";
+
+    // WHEN
+    boolean isEmoji = EmojiManager.isOnlyEmojis(str);
+
+    // THEN
+    assertTrue(isEmoji);
+  }
+
+  @Test
+  public void isOnlyEmojis_for_random_string_returns_false() {
+    // GIVEN
+    String str = "😀a";
+
+    // WHEN
+    boolean isEmoji = EmojiManager.isOnlyEmojis(str);
+
+    // THEN
+    assertFalse(isEmoji);
+  }
+
   @Test
   public void getAllTags_returns_the_tags() {
     // GIVEN