add-class-full-covered

src/main/java/com/codescene/Strings.java

@@ -0,0 +1,14 @@
+package com.codescene;
+
+import java.util.Arrays;
+import java.util.stream.Collectors;
+
+public class Strings {
+
+    public String capitalize(String input){
+        if(input == null) return null;
+        return Arrays.stream(input.split(" "))
+                .map(v -> v.substring(0, 1).toUpperCase() + v.substring(1).toLowerCase())
+                .collect(Collectors.joining(" "));
+    }
+}

src/test/java/com/codescene/StringsTest.java

@@ -0,0 +1,24 @@
+package com.codescene;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+public class StringsTest {
+
+    private static Strings strings;
+    @BeforeAll
+    static void setUp(){
+        strings = new Strings();
+    }
+
+    @Test
+    void capitalizeNull(){
+        Assertions.assertNull(strings.capitalize(null));
+    }
+
+    @Test
+    void capitalize(){
+        Assertions.assertEquals("This Is A Test", strings.capitalize("this is a TEST"));
+    }
+}