added set special characters function and VaultInterface refactor

src/main/java/Vault.java

@@ -8,7 +8,8 @@ public class Vault implements VaultInterface {
 
     public boolean config;
     public int PWLength;
-    public boolean haveCapitals = false;
+    public boolean haveCapitals;
+    public boolean hasSpecialChars;
     InputStream inputS = System.in;
     OutputStream outputS = System.out;
 
@@ -75,7 +76,7 @@ public class Vault implements VaultInterface {
     }
 
     public void setCapital() {
-        println("Should you PW have Capitals? Type in yes or no.");
+        println("Should you PW have capitals? Type in yes or no.");
 
         Scanner scan = new Scanner(inputS);
         String input = scan.nextLine();
@@ -88,4 +89,20 @@ public class Vault implements VaultInterface {
             println("Your PWs don´t have capitals anymore.");
         }
     }
+
+
+    public void setSpecialChar() {
+        println("Should you PW have special characters? Type in yes or no.");
+
+        Scanner scan = new Scanner(inputS);
+        String input = scan.nextLine();
+
+        if(input.equals("yes")){
+            hasSpecialChars = true;
+            println("Your PWs contain now special characters.");
+        }else if(input.equals("no")){
+            hasSpecialChars = false;
+            println("Your PWs don´t have special characters anymore.");
+        }
+    }
 }

src/main/java/VaultInterface.java

@@ -2,10 +2,9 @@
 
 public interface VaultInterface {
 
-    public void configure();
-    public void addCredential();
-    public void showCredential();
-    public void getAsJson();
-    public void loadFromJson();
-
+    void configure();
+    void addCredential();
+    void showCredential();
+    void getAsJson();
+    void loadFromJson();
 }

src/test/java/VaultTest.java

@@ -122,6 +122,26 @@ public class VaultTest {
         assertTrue(outputStream.toString().contains("don´t"));
     }
 
+    @Test
+    void setSpecialCharTest() {
+        vlt.inputS = new ByteArrayInputStream("yes\n".getBytes(StandardCharsets.UTF_8));
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        vlt.outputS = outputStream;
+        vlt.setSpecialChar();
+
+        assertTrue(outputStream.toString().startsWith("Should"));
+        assertTrue(vlt.hasSpecialChars = true);
+        assertTrue(outputStream.toString().contains("contain"));
+
+        vlt.inputS = new ByteArrayInputStream("no\n".getBytes(StandardCharsets.UTF_8));
+        vlt.outputS = outputStream;
+        vlt.setSpecialChar();
+
+        assertTrue(outputStream.toString().startsWith("Should"));
+        assertFalse(vlt.hasSpecialChars = false);
+        assertTrue(outputStream.toString().contains("don´t"));
+    }
+
     private ByteArrayInputStream getEmptyStringInputStream() {
         return new ByteArrayInputStream("".getBytes(StandardCharsets.UTF_8));
     }