test Pesel

pom.xml

@@ -20,4 +20,14 @@
             </plugin>
         </plugins>
     </build>
+
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/junit/junit -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 </project>

src/main/java/Pesel.java

@@ -1,12 +1,9 @@
 public class Pesel {
-    protected static String pesel;
-
     public static boolean checkPesel(String pesel) {
-        Pesel.pesel = pesel;
+        return (len(pesel) && checksum(pesel) && dayOfBirth(pesel));
-        return (len() && checksum() && dayOfBirth());
     }
 
-    public static boolean checksum() {
+    public static boolean checksum(String pesel) {
         int[] multipliers = {1, 3, 7, 9, 1, 3, 7, 9, 1, 3, 1};
         int sum = 0;
 
@@ -22,7 +19,7 @@ public class Pesel {
         }
     }
 
-    public static boolean dayOfBirth() {
+    public static boolean dayOfBirth(String pesel) {
         String dayOfBirthStr = pesel.substring(4,6);
         int dayOfBirth = Integer.valueOf(dayOfBirthStr);
         if(dayOfBirth > 0 && dayOfBirth < 32) {
@@ -33,7 +30,7 @@ public class Pesel {
         }
     }
 
-    public static boolean len() {
+    public static boolean len(String pesel) {
         if(pesel.length() == 11) {
             return true;
         }

src/test/java/PeselTest.java

@@ -0,0 +1,63 @@
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class PeselTest {
+
+    @Test
+    public void checkPeselText() {
+        String[] texts = {"Lorem ipsum", "dolor", "sit", "amet"};
+
+        for(String t : texts) {
+            boolean result = Pesel.checkPesel(t);
+            assertFalse(result);
+        }
+    }
+
+    @Test
+    public void checkPeselInputLength() {
+        String[] numbers1 = {"49062718478", "77061559693", "55091042989", "60062692771", "51112482695", "45123178535"};
+
+        for(String num : numbers1) {
+            boolean result = Pesel.len(num);
+            assertTrue(result);
+        }
+
+        String[] numbers2 = {"490627184781", "770615596", "5509104298911", "6006269", "511124826952", "451231785355"};
+        for(String num : numbers2) {
+            boolean result = Pesel.len(num);
+            assertFalse(result);
+        }
+    }
+
+    @Test
+    public void checkPeselChecksum() {
+        String[] numbers1 = {"49062718478", "77061559693", "55091042989", "60062692771", "51112482695", "45123178535"};
+        for(String num : numbers1) {
+            boolean result = Pesel.checksum(num);
+            assertTrue(result);
+        }
+
+        String[] numbers2 = {"49062718479", "77061559694", "55091042980", "60062692772", "51112482696", "45123178534"};
+        for(String num : numbers2) {
+            boolean result = Pesel.checksum(num);
+            assertFalse(result);
+        }
+    }
+
+    @Test
+    public void checkPeselDayOfBirth() {
+        String[] numbers1 = {"49062718478", "77061559693", "55091042989", "60062692771", "51112482695", "45123178535"};
+        for (String num : numbers1) {
+            boolean result = Pesel.dayOfBirth(num);
+            assertTrue(result);
+        }
+
+        String[] numbers2 = {"49060018478", "77063259693", "55094442989", "60066592771", "51118782695", "45123278535"};
+        for (String num : numbers2) {
+            boolean result = Pesel.dayOfBirth(num);
+            assertFalse(result);
+        }
+    }
+}