implement generating passwords with special characters

src/main/java/PasswordGenerator.java

@@ -5,11 +5,13 @@ public class PasswordGenerator {
     final String lowercaseCharacters = "abcdefghjkmnpqrstuvwxyz";
     final String uppercaseCharacters = "ABCDEFGHJKMNPQRSTUVWXYZ";
     final String digits = "0123456789";
+    final String specialCharacters = ".!?=@#$()%^&/*_-+";
 
     private int length = 12;
     private boolean useUppercase = true;
     private boolean useLowercase = true;
     private boolean useDigits = true;
+    private boolean useSpecialCharacters = true;
 
 
     public String generateRandomPassword() {
@@ -26,6 +28,9 @@ public class PasswordGenerator {
         if (isUseDigits()) {
             characterPool += digits;
         }
+        if (isUseSpecialCharacters()) {
+            characterPool += specialCharacters;
+        }
 
         for (int generatorPosition = 0; generatorPosition < getLength(); generatorPosition++) {
             generatedPassword.append(characterPool.charAt(rand.nextInt(characterPool.length())));
@@ -57,6 +62,14 @@ public class PasswordGenerator {
         this.useDigits = useDigits;
     }
 
+    public boolean isUseSpecialCharacters() {
+        return useSpecialCharacters;
+    }
+
+    public void setUseSpecialCharacters(boolean useSpecialCharacters) {
+        this.useSpecialCharacters = useSpecialCharacters;
+    }
+
     public int getLength() {
         return length;
     }

src/test/java/PasswordGeneratorTest.java

@@ -47,4 +47,12 @@ class PasswordGeneratorTest {
         passwordGenerator.setUseDigits(true);
         assertTrue(Pattern.compile("^(?=.*\\d).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
     }
+
+    @Test
+    void testPasswordSpecialCharactersRequirement() {
+        passwordGenerator.setUseSpecialCharacters(false);
+        assertFalse(Pattern.compile("^(?=.*[.!?=@#$()%^&/*_\\-+]).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
+        passwordGenerator.setUseSpecialCharacters(true);
+        assertTrue(Pattern.compile("^(?=.*[.!?=@#$()%^&/*_\\-+]).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
+    }
 }