Michael Davis Challenge

pom.xml

@@ -22,6 +22,16 @@
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-text</artifactId>
+            <version>1.9</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.12.0</version>
+        </dependency>
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-api</artifactId>

src/main/java/com/github/archarithms/App.java

@@ -1,15 +1,56 @@
 package com.github.archarithms;
 
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.text.WordUtils;
+import java.time.*;
+import java.time.format.DateTimeFormatter;
 
 public class App
 {
-  public static String convertToTitleCase(final String inpStr)
+  public static String convertToTitleCase(final String inpStr) throws NullPointerException
   {
-    return inpStr;
+    // Check for null input
+     if (inpStr == null){
+      throw new NullPointerException();
+    } 
+
+    // Remove non-alphanumeric characters and replace them with spaces
+    String result = inpStr;
+    result = result.replaceAll("[^A-Za-z0-9]", " ");
+
+    // Remove trailing spaces
+    result = StringUtils.stripEnd(result, " ");
+
+    // Set Correct Case
+    result = WordUtils.capitalizeFully(result);
+
+    return result;
+  }
+
+  public static String convertUnixToDateString()
+  {
+    // Get the current date.
+    LocalDate dt = LocalDate.now();
+
+    // Specify the desired date format.
+    DateTimeFormatter fmt = DateTimeFormatter.ofPattern("MMMM d, yyyy").withZone(ZoneId.systemDefault());
+
+    // Return the current date.
+    return dt.format(fmt).toString();
   }
 
-  public static String convertUnixToDateString(final Long inpUnixSeconds)
+  public static String convertUnixToDateString(final Long inpUnixSeconds) throws NullPointerException
   {
-    return String.valueOf(inpUnixSeconds);
+    // Specify the desired date format.
+    DateTimeFormatter fmt = DateTimeFormatter.ofPattern("MMMM d, yyyy").withZone(ZoneId.systemDefault());
+
+    // Throw exception if the input is null.
+     if (inpUnixSeconds == null){
+      throw new NullPointerException();
+    } 
+
+    // Otherwise convert the unix epoch seconds to a datetime.
+    Instant inst = Instant.ofEpochSecond(inpUnixSeconds);
+    return fmt.format(inst);
   }
 }

src/test/java/com/github/archarithms/test/DateStringTests.java

@@ -3,6 +3,10 @@
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import java.time.LocalDate;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+
 import org.junit.jupiter.api.Test;
 
 import com.github.archarithms.App;
@@ -33,4 +37,26 @@ public void testConvertUnixToDateString() {
     public void testNullCase() {
         assertThrows(Exception.class, () -> App.convertUnixToDateString(null));
     }
+
+
+    /**
+     * Test the testNoInput method
+     */
+    @Test
+    public void testNoInput() {
+        LocalDate dt = LocalDate.now();
+        DateTimeFormatter fmt = DateTimeFormatter.ofPattern("MMMM d, yyyy").withZone(ZoneId.systemDefault());
+        String testStr = dt.format(fmt).toString();
+        assertTrue(testStr.equals(App.convertUnixToDateString()));
+    }
+
+        /**
+     * Test the testWrongType method
+     * Note: Java is a strongly typed language. As such the compiler will catch mismatches at compile time.
+     * This can be tested by uncommenting the test case below:
+     */
+/*     @Test
+    public void testWrongType() {
+        assertThrows(Exception.class, () -> App.convertUnixToDateString("149914400L"));
+    } */
 }

src/test/java/com/github/archarithms/test/TitleCaseTests.java

@@ -42,4 +42,13 @@ public void testOtherChars() {
         String testStr = "Truth Track";
         assertTrue(testStr.equals(App.convertToTitleCase("TRUTH-TRACK")));
     }
+
+        /**
+     * Test the testEndSpaces method
+     */
+    @Test
+    public void testEndSpaces() {
+        String testStr = "No End Spaces";
+        assertTrue(testStr.equals(App.convertToTitleCase("NO END SPACES   ")));
+    }
 }