feat(js): Dynamic ActionCable URL (#35579)

* Failing test case

* feat: Dynamic Url Generation

Change createWebSocketURL to be a closure that allows url to be evaluated at the time the webSocket is established

* refactor: createWebSocketURL to Consumer, remove need for closure

Move initial call to createWebSocketURL in createConsumer

* docs: Add documentation for dynamic url and string args to createConsumer

Co-Authored-By: rmacklin <rmacklin@users.noreply.github.com>

[Ryan Castner, rmacklin]

1 files changed, 5 insertions, 2 deletions

diff --git a/actioncable/test/javascript/src/unit/action_cable_test.js b/actioncable/test/javascript/src/unit/action_cable_test.js
index c9d34abc6d..2181f955e3 100644
--- a/actioncable/test/javascript/src/unit/action_cable_test.js
+++ b/actioncable/test/javascript/src/unit/action_cable_test.js
@@ -43,11 +43,14 @@ module("ActionCable", () => {
     })
 
     test("uses function to generate URL", assert => {
+      let dynamicURL = testURL
       const generateURL = () => {
-        return testURL
+        return dynamicURL
       }
+
+      dynamicURL = `${testURL}foo`
       const consumer = ActionCable.createConsumer(generateURL)
-      assert.equal(consumer.url, testURL)
+      assert.equal(consumer.url, `${testURL}foo`)
     })
   })
 })