#347 Create tests and add check for missing settings in NewSetting

src/main/java/fr/xephi/authme/settings/domain/Property.java

@@ -74,6 +74,16 @@ public class Property<T> {
         return type.asYaml(this, configuration);
     }
 
+    /**
+     * Return whether or not the given configuration file contains the property.
+     *
+     * @param configuration The configuration file to verify
+     * @return True if the property is present, false otherwise
+     */
+    public boolean isPresent(YamlConfiguration configuration) {
+        return type.contains(this, configuration);
+    }
+
     // -----
     // Trivial getters
     // -----

src/main/java/fr/xephi/authme/settings/domain/PropertyType.java

@@ -41,6 +41,17 @@ public abstract class PropertyType<T> {
         return asYaml(getFromFile(property, configuration));
     }
 
+    /**
+     * Return whether the property is present in the given configuration.
+     *
+     * @param property The property to search for
+     * @param configuration The configuration to verify
+     * @return True if the property is present, false otherwise
+     */
+    public boolean contains(Property<T> property, YamlConfiguration configuration) {
+        return configuration.contains(property.getPath());
+    }
+
     /**
      * Transform the given value to YAML.
      *
@@ -49,10 +60,6 @@ public abstract class PropertyType<T> {
      */
     protected abstract List<String> asYaml(T value);
 
-    protected boolean contains(Property<T> property, YamlConfiguration configuration) {
-        return configuration.contains(property.getPath());
-    }
-
 
     /**
      * Boolean property.
@@ -145,6 +152,11 @@ public abstract class PropertyType<T> {
             }
             return resultLines;
         }
+
+        @Override
+        public boolean contains(Property<List<String>> property, YamlConfiguration configuration) {
+            return configuration.contains(property.getPath()) && configuration.isList(property.getPath());
+        }
     }
 
 }