Reset app configs by deleting the values instead of setting the defaults

This avoids the need to keep the default values in the integration tests
in sync with the code, and also makes possible to reset values with
"dynamic" defaults (defaults that depend on other values).

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

build/integration/features/bootstrap/AppConfiguration.php

 		}
 	}
 
+	/**
+	 * @param string $app
+	 * @param string $parameter
+	 * @param string $value
+	 */
+	protected function deleteServerConfig($app, $parameter) {
+		$this->sendingTo('DELETE', "/apps/testing/api/v1/app/{$app}/{$parameter}");
+		$this->theHTTPStatusCodeShouldBe('200');
+		if ($this->apiVersion === 1) {
+			$this->theOCSStatusCodeShouldBe('100');
+		}
+	}
+
 	protected function setStatusTestingApp($enabled) {
 		$this->sendingTo(($enabled ? 'post' : 'delete'), '/cloud/apps/testing');
 		$this->theHTTPStatusCodeShouldBe('200');

build/integration/features/bootstrap/CapabilitiesContext.php

 	}
 
 	protected function resetAppConfigs() {
-		$this->modifyServerConfig('core', 'shareapi_enabled', 'yes');
-		$this->modifyServerConfig('core', 'shareapi_allow_links', 'yes');
-		$this->modifyServerConfig('core', 'shareapi_allow_public_upload', 'yes');
-		$this->modifyServerConfig('core', 'shareapi_allow_resharing', 'yes');
-		$this->modifyServerConfig('files_sharing', 'outgoing_server2server_share_enabled', 'yes');
-		$this->modifyServerConfig('files_sharing', 'incoming_server2server_share_enabled', 'yes');
-		$this->modifyServerConfig('core', 'shareapi_enforce_links_password', 'no');
-		$this->modifyServerConfig('core', 'shareapi_allow_public_notification', 'no');
-		$this->modifyServerConfig('core', 'shareapi_default_expire_date', 'no');
-		$this->modifyServerConfig('core', 'shareapi_enforce_expire_date', 'no');
-		$this->modifyServerConfig('core', 'shareapi_allow_group_sharing', 'yes');
+		$this->deleteServerConfig('core', 'shareapi_enabled');
+		$this->deleteServerConfig('core', 'shareapi_allow_links');
+		$this->deleteServerConfig('core', 'shareapi_allow_public_upload');
+		$this->deleteServerConfig('core', 'shareapi_allow_resharing');
+		$this->deleteServerConfig('files_sharing', 'outgoing_server2server_share_enabled');
+		$this->deleteServerConfig('files_sharing', 'incoming_server2server_share_enabled');
+		$this->deleteServerConfig('core', 'shareapi_enforce_links_password');
+		$this->deleteServerConfig('core', 'shareapi_allow_public_notification');
+		$this->deleteServerConfig('core', 'shareapi_default_expire_date');
+		$this->deleteServerConfig('core', 'shareapi_enforce_expire_date');
+		$this->deleteServerConfig('core', 'shareapi_allow_group_sharing');
 	}
 }

build/integration/features/bootstrap/FederationContext.php

 	}
 
 	protected function resetAppConfigs() {
-		$this->modifyServerConfig('files_sharing', 'incoming_server2server_group_share_enabled', 'no');
-		$this->modifyServerConfig('files_sharing', 'outgoing_server2server_group_share_enabled', 'no');
+		$this->deleteServerConfig('files_sharing', 'incoming_server2server_group_share_enabled');
+		$this->deleteServerConfig('files_sharing', 'outgoing_server2server_group_share_enabled');
 	}
 }

build/integration/features/bootstrap/ShareesContext.php

 	use AppConfiguration;
 
 	protected function resetAppConfigs() {
-		$this->modifyServerConfig('core', 'shareapi_only_share_with_group_members', 'no');
-		$this->modifyServerConfig('core', 'shareapi_allow_share_dialog_user_enumeration', 'yes');
-		$this->modifyServerConfig('core', 'shareapi_allow_group_sharing', 'yes');
+		$this->deleteServerConfig('core', 'shareapi_only_share_with_group_members');
+		$this->deleteServerConfig('core', 'shareapi_allow_share_dialog_user_enumeration');
+		$this->deleteServerConfig('core', 'shareapi_allow_group_sharing');
 	}
 }

build/integration/features/bootstrap/SharingContext.php

 	use CommandLine;
 
 	protected function resetAppConfigs() {
-		$this->modifyServerConfig('core', 'shareapi_default_permissions', '31');
-		$this->modifyServerConfig('sharebymail', 'enforcePasswordProtection', 'no');
+		$this->deleteServerConfig('core', 'shareapi_default_permissions');
+		$this->deleteServerConfig('sharebymail', 'enforcePasswordProtection');
 	}
 }