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backend/node_modules/avvio/lib/validate-plugin.js

@@ -0,0 +1,26 @@
+'use strict'
+
+const { AVV_ERR_PLUGIN_NOT_VALID } = require('./errors')
+
+/**
+ * @param {any} maybePlugin
+ * @throws {AVV_ERR_PLUGIN_NOT_VALID}
+ *
+ * @returns {asserts plugin is Function|PromiseLike}
+ */
+function validatePlugin (maybePlugin) {
+  // validate if plugin is a function or Promise
+  if (!(maybePlugin && (typeof maybePlugin === 'function' || typeof maybePlugin.then === 'function'))) {
+    if (Array.isArray(maybePlugin)) {
+      throw new AVV_ERR_PLUGIN_NOT_VALID('array')
+    } else if (maybePlugin === null) {
+      throw new AVV_ERR_PLUGIN_NOT_VALID('null')
+    } else {
+      throw new AVV_ERR_PLUGIN_NOT_VALID(typeof maybePlugin)
+    }
+  }
+}
+
+module.exports = {
+  validatePlugin
+}