Add default error message to is-youtube-url

Author: agjs

src/Keywords/is-youtube-url.js

@@ -4,7 +4,22 @@ export default {
   type: "string",
   errors: true,
   keyword: "is-youtube-url",
-  validate: (_, value) => {
-    return StringUtils.isValidYouTubeURL(value);
+  compile: function compile() {
+    return function validate(value) {
+      validate.errors = null;
+
+      if (!StringUtils.isValidYouTubeURL(value)) {
+        validate.errors = [
+          {
+            keyword: "is-youtube-url",
+            message: "Invalid YouTube URL",
+            params: { invalidInput: value },
+          },
+        ];
+        return false;
+      }
+
+      return true;
+    };
   },
 };

src/Keywords/keywords.test.js

@@ -22,6 +22,7 @@ describe("Keywords", () => {
         type: "object",
         properties: { foo: { type: "string", "is-youtube-url": true } },
       };
+
       const validate = ajv.compile(schema);
       const valid = validate({
         foo: "https://www.youtube.com/watch?v=uxQxd_z_uqc&t=24sd",
@@ -35,10 +36,14 @@ describe("Keywords", () => {
         type: "object",
         properties: { foo: { type: "string", "is-youtube-url": true } },
       };
+
       const validate = ajv.compile(schema);
       const valid = validate({ foo: "https://example.com" });
 
+      const [error] = validate.errors;
+
       expect(valid).toBe(false);
+      expect(error.message).toBe("Invalid YouTube URL");
     });
   });