Add tests for the Change Password Endpoints

scm-core/src/main/java/sonia/scm/user/ChangePasswordNotAllowedException.java

@@ -0,0 +1,9 @@
+package sonia.scm.user;
+
+public class ChangePasswordNotAllowedException extends RuntimeException {
+
+  public ChangePasswordNotAllowedException(String message) {
+    super(message);
+  }
+
+}

scm-core/src/main/java/sonia/scm/user/InvalidPasswordException.java

@@ -0,0 +1,8 @@
+package sonia.scm.user;
+
+public class InvalidPasswordException extends RuntimeException {
+
+  public InvalidPasswordException(String message) {
+    super(message);
+  }
+}

scm-core/src/main/java/sonia/scm/user/UserManager.java

@@ -38,6 +38,9 @@ package sonia.scm.user;
 import sonia.scm.Manager;
 import sonia.scm.search.Searchable;
 
+import java.text.MessageFormat;
+import java.util.function.Consumer;
+
 /**
  * The central class for managing {@link User} objects.
  * This class is a singleton and is available via injection.
@@ -68,4 +71,22 @@ public interface UserManager
    * @since 1.14
    */
   public String getDefaultType();
+
+
+  /**
+   * Only account of the default type "xml" can change their password
+   */
+  default Consumer<User> getUserTypeChecker() {
+    return user -> {
+      if (!isTypeDefault(user)) {
+        throw new ChangePasswordNotAllowedException(MessageFormat.format("It is not possible to change password for User of type {0}", user.getType()));
+      }
+    };
+  }
+
+  default boolean isTypeDefault(User user) {
+    return getDefaultType().equals(user.getType());
+  }
+
+
 }