100%

src/main/java/se/cygni/palmithor/tdd/StringUtils.java

@@ -4,17 +4,32 @@ public class StringUtils {
 
 
     public boolean isPalindrome(final String str) {
-        throw new RuntimeException("Not yet implemented");
+        if (str == null) return false;
+
+        var maxIndex = str.length();
+        for (int i = 0; i < str.length(); i++) {
+            maxIndex--;
+            if (str.charAt(i) != str.charAt(maxIndex))
+                return false;
+        }
+        return true;
+
+        // (throw new RuntimeException("Not yet implemented");
     }
 
 
     /**
      * Checks if a String is empty (""), null or whitespace only.
-     * @param str the string to check
      *
+     * @param str the string to check
      * @return true if str is null, empty or whitespace only, otherwise false
      */
     public boolean isBlank(final String str) {
-        throw new RuntimeException("Not yet implemented");
+        if (str == null)
+            return true;
+        String s = str.strip();
+        if (s.isEmpty())
+            return true;
+        return false;
     }
 }

src/test/java/se/cygni/palmithor/tdd/CalculatorTest.java

@@ -13,8 +13,8 @@ public class CalculatorTest {
 
     @Test
     public void test() {
-        assertThat(calculator.sumAll().get()).isEqualTo(1); // TODO failing on purpose please fix
+        assertThat(calculator.sumAll().get()).isEqualTo(0);
+        assertThat(calculator.sumAll(null)).isEqualTo(Optional.empty());
+        assertThat(calculator.sumAll(1, 2)).isEqualTo(Optional.of(3));
     }
-
-
 }

src/test/java/se/cygni/palmithor/tdd/StringUtilsTest.java

@@ -24,6 +24,15 @@ public void isPalindrome() {
      */
     @Test
     public void isBlank() {
-        // stringUtils.isBlank()
+        assertThat(stringUtils.isBlank(" ")).isTrue();
+        assertThat(stringUtils.isBlank("          ")).isTrue();
+        assertThat(stringUtils.isBlank("    ")).isTrue();
+        assertThat(stringUtils.isBlank("\r")).isTrue();
+        assertThat(stringUtils.isBlank("\n")).isTrue();
+        assertThat(stringUtils.isBlank("\t")).isTrue();
+        assertThat(stringUtils.isBlank("a   ö")).isFalse();
+        assertThat(stringUtils.isBlank("g")).isFalse();
+        assertThat(stringUtils.isBlank(null)).isTrue();
+        assertThat(stringUtils.isBlank("")).isTrue();
     }
 }