Fixes Emoji Joining issues.

app/src/test/java/com/vitorpamplona/amethyst/CharsetTest.kt

@@ -11,12 +11,12 @@ class CharsetTest {
     }
 
     @Test
-    fun testUTF16Char() {
+    fun testUTF16JoinChar() {
         Assert.assertEquals("\uD83C\uDF48", "\uD83C\uDF48Hi".firstFullChar())
     }
 
     @Test
-    fun testUTF32Char() {
+    fun testUTF32JoinChar() {
         Assert.assertEquals("\uD83E\uDDD1\uD83C\uDFFE", "\uD83E\uDDD1\uD83C\uDFFEHi".firstFullChar())
     }
 
@@ -34,4 +34,19 @@ class CharsetTest {
     fun testSpecialChars() {
         Assert.assertEquals("=", "=x".firstFullChar())
     }
+
+    @Test
+    fun test5CharEmoji() {
+        Assert.assertEquals("\uD83D\uDC68\u200D\uD83D\uDCBB", "\uD83D\uDC68\u200D\uD83D\uDCBBadsfasdf".firstFullChar())
+    }
+
+    @Test
+    fun testFamily() {
+        Assert.assertEquals("\uD83D\uDC68\u200d\uD83D\uDC69\u200d\uD83D\uDC67\u200d\uD83D\uDC67", "\uD83D\uDC68\u200D\uD83D\uDC69\u200D\uD83D\uDC67\u200D\uD83D\uDC67adsfasdf".firstFullChar())
+    }
+
+    @Test
+    fun testTeacher() {
+        Assert.assertEquals("\uD83E\uDDD1\uD83C\uDFFF\u200D\uD83C\uDFEB", "\uD83E\uDDD1\uD83C\uDFFF\u200D\uD83C\uDFEBasdf".firstFullChar())
+    }
 }