--- /dev/null
+<?php
+
+namespace Drupal\config_test;
+
+use Symfony\Component\Validator\Context\ExecutionContextInterface;
+
+/**
+ * Provides a collection of validation callbacks for testing purposes.
+ */
+class ConfigValidation {
+
+ /**
+ * Validates a llama.
+ *
+ * @param string $string
+ * The string to validate.
+ * @param \Symfony\Component\Validator\Context\ExecutionContextInterface $context
+ * The validation execution context.
+ */
+ public static function validateLlama($string, ExecutionContextInterface $context) {
+ if (!in_array($string, ['llama', 'alpaca', 'guanaco', 'vicuña'], TRUE)) {
+ $context->addViolation('no valid llama');
+ }
+ }
+
+ /**
+ * Validates cats.
+ *
+ * @param string $string
+ * The string to validate.
+ * @param \Symfony\Component\Validator\Context\ExecutionContextInterface $context
+ * The validation execution context.
+ */
+ public static function validateCats($string, ExecutionContextInterface $context) {
+ if (!in_array($string, ['kitten', 'cats', 'nyans'])) {
+ $context->addViolation('no valid cat');
+ }
+ }
+
+ /**
+ * Validates a number.
+ *
+ * @param int $count
+ * The integer to validate.
+ * @param \Symfony\Component\Validator\Context\ExecutionContextInterface $context
+ * The validation execution context.
+ */
+ public static function validateCatCount($count, ExecutionContextInterface $context) {
+ if ($count <= 1) {
+ $context->addViolation('no enough cats');
+ }
+ }
+
+ /**
+ * Validates giraffes.
+ *
+ * @param string $string
+ * The string to validate.
+ * @param \Symfony\Component\Validator\Context\ExecutionContextInterface $context
+ * The validation execution context.
+ */
+ public static function validateGiraffes($string, ExecutionContextInterface $context) {
+ if (strpos($string, 'hum') !== 0) {
+ $context->addViolation('Giraffes just hum');
+ }
+ }
+
+ /**
+ * Validates a mapping.
+ *
+ * @param array $mapping
+ * The data to validate.
+ * @param \Symfony\Component\Validator\Context\ExecutionContextInterface $context
+ * The validation execution context.
+ */
+ public static function validateMapping($mapping, ExecutionContextInterface $context) {
+ if ($diff = array_diff(array_keys($mapping), ['llama', 'cat', 'giraffe', 'uuid', '_core'])) {
+ $context->addViolation('Missing giraffe.');
+ }
+ }
+
+ /**
+ * Validates a sequence.
+ *
+ * @param array $sequence
+ * The data to validate.
+ * @param \Symfony\Component\Validator\Context\ExecutionContextInterface $context
+ * The validation execution context.
+ */
+ public static function validateSequence($sequence, ExecutionContextInterface $context) {
+ if (isset($sequence['invalid-key'])) {
+ $context->addViolation('Invalid giraffe key.');
+ }
+ }
+
+}