Solve Hackerrank problem

https://www.hackerrank.com/challenges/java-string-tokens

Author: anitsh

src/main/java/hackerrank/java/StringToken.java

@@ -0,0 +1,20 @@
+package hackerrank.java;
+
+public class StringToken {
+    private String sentence;
+
+    public StringToken(final String sentence) {
+            this.sentence = sentence;
+    }
+
+    public String[] tokenFilter() {
+
+        if( sentence == null || sentence.isEmpty()
+                || sentence.trim().isEmpty()) {
+            return new String[]{};
+        }
+        String[] splitStr = sentence.trim().split("[,\\s\\'\\?\\_\\@\\!\\.]+");
+
+        return splitStr;
+    }
+}

src/test/java/hackerranktest/java/StringTokensTest.java

@@ -0,0 +1,41 @@
+package hackerranktest.java;
+
+import hackerrank.java.StringToken;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+
+/**
+ *
+ * Problem
+ * https://www.hackerrank.com/challenges/java-string-tokens/
+ *
+ */
+public class StringTokensTest {
+
+    @Test
+    void givenASentencePrintWithoutTokens() {
+        String given =  "He is a very very good boy, isn't he?";
+        String expected =  "Heisaveryverygoodboyisnthe";
+
+        StringToken obj = new StringToken(given);
+        String[] actualArr = obj.tokenFilter();
+        String actual = String.join("", actualArr);
+
+        Assertions.assertEquals(10, actualArr.length);
+        Assertions.assertEquals(expected, actual);
+    }
+
+    @Test
+    void givenAnEmptyStringPrintReturnEmptyString() {
+        String given =  "";
+        String expected =  "";
+
+        StringToken obj = new StringToken(given);
+        String[] actualArr = obj.tokenFilter();
+        String actual = String.join("", actualArr);
+
+        Assertions.assertEquals(0, actualArr.length);
+        Assertions.assertEquals(expected, actual);
+    }
+}