diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000..76fbf04
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,6 @@
+coverage:
+  status:
+    project:
+      default:
+        # basic
+        target: 100%
\ No newline at end of file
diff --git a/src/main/java/se/cygni/palmithor/tdd/StringUtils.java b/src/main/java/se/cygni/palmithor/tdd/StringUtils.java
index 3b36d6b..9b17964 100644
--- a/src/main/java/se/cygni/palmithor/tdd/StringUtils.java
+++ b/src/main/java/se/cygni/palmithor/tdd/StringUtils.java
@@ -4,7 +4,11 @@ public class StringUtils {
 
 
     public boolean isPalindrome(final String str) {
-        throw new RuntimeException("Not yet implemented");
+        if(str == null) {
+            return false;
+        }
+        String reversed = new StringBuilder(str).reverse().toString();
+        return str.equals(reversed);
     }
 
 
@@ -15,6 +19,6 @@ public boolean isPalindrome(final String str) {
      * @return true if str is null, empty or whitespace only, otherwise false
      */
     public boolean isBlank(final String str) {
-        throw new RuntimeException("Not yet implemented");
+        return str == null || str.trim().equals("");
     }
 }
diff --git a/src/test/java/se/cygni/palmithor/tdd/CalculatorTest.java b/src/test/java/se/cygni/palmithor/tdd/CalculatorTest.java
index ed4264e..097d4a2 100644
--- a/src/test/java/se/cygni/palmithor/tdd/CalculatorTest.java
+++ b/src/test/java/se/cygni/palmithor/tdd/CalculatorTest.java
@@ -13,7 +13,9 @@ public class CalculatorTest {
 
     @Test
     public void test() {
-        //assertThat(calculator.sumAll().get()).isEqualTo(1); // fail un purpose
+        assertThat(calculator.sumAll(1, 0, -1, 1).get()).isEqualTo(1); // TODO failing on purpose please fix
+        assertThat(calculator.sumAll(null).isPresent()).isFalse(); // TODO failing on purpose please fix
+        assertThat(calculator.sumAll().get()).isEqualTo(0); // TODO failing on purpose please fix
     }
 
 
diff --git a/src/test/java/se/cygni/palmithor/tdd/StringUtilsTest.java b/src/test/java/se/cygni/palmithor/tdd/StringUtilsTest.java
index 09cabc4..8c74011 100644
--- a/src/test/java/se/cygni/palmithor/tdd/StringUtilsTest.java
+++ b/src/test/java/se/cygni/palmithor/tdd/StringUtilsTest.java
@@ -11,21 +11,24 @@ public class StringUtilsTest {
 
     @Test
     public void isPalindrome() {
-        /*
         assertThat(stringUtils.isPalindrome("aabb")).isFalse();
         assertThat(stringUtils.isPalindrome(null)).isFalse();
         assertThat(stringUtils.isPalindrome("NotEvenClose")).isFalse();
         assertThat(stringUtils.isPalindrome("")).isTrue();
         assertThat(stringUtils.isPalindrome("abba")).isTrue();
         assertThat(stringUtils.isPalindrome("tattarrattat")).isTrue();
-        */
     }
 
+
     /**
      * For the following function, you choose if you want to use TDD or not
      */
     @Test
     public void isBlank() {
-        // stringUtils.isBlank()
+        assertThat(stringUtils.isBlank(null)).isTrue();
+        assertThat(stringUtils.isBlank("")).isTrue();
+        assertThat(stringUtils.isBlank("    ")).isTrue();
+        assertThat(stringUtils.isBlank("2fwefw a")).isFalse();
+        assertThat(stringUtils.isBlank(" a")).isFalse();
     }
 }
\ No newline at end of file