Replace reference to WebSocket global with ActionCable.adapters.WebSocket

The WebSocket dependency of ActionCable.Connection was made configurable
in 66901c1849efae74c8a58fe0cb36afd487c067cc

However, the reference here in Connection#getState was not updated to
use the configurable property. This change remedies that and adds a test
to verify it. Additionally, it backfills a test to ensure that
Connection#open uses the configurable property.

2 files changed, 29 insertions, 0 deletions

diff --git a/actioncable/test/javascript/src/test.js b/actioncable/test/javascript/src/test.js
index 1fca7ab4d3..eea1c0a408 100644
--- a/actioncable/test/javascript/src/test.js
+++ b/actioncable/test/javascript/src/test.js
@@ -1,5 +1,6 @@
 import "./test_helpers/index"
 import "./unit/action_cable_test"
+import "./unit/connection_test"
 import "./unit/consumer_test"
 import "./unit/subscription_test"
 import "./unit/subscriptions_test"
diff --git a/actioncable/test/javascript/src/unit/connection_test.js b/actioncable/test/javascript/src/unit/connection_test.js
new file mode 100644
index 0000000000..9b1a975bfb
--- /dev/null
+++ b/actioncable/test/javascript/src/unit/connection_test.js
@@ -0,0 +1,28 @@
+import * as ActionCable from "../../../../app/javascript/action_cable/index"
+
+const {module, test} = QUnit
+
+module("ActionCable.Connection", () => {
+  module("#getState", () => {
+    test("uses the configured WebSocket adapter", assert => {
+      ActionCable.adapters.WebSocket = { foo: 1, BAR: "42" }
+      const connection = new ActionCable.Connection({})
+      connection.webSocket = {}
+      connection.webSocket.readyState = 1
+      assert.equal(connection.getState(), "foo")
+      connection.webSocket.readyState = "42"
+      assert.equal(connection.getState(), "bar")
+    })
+  })
+
+  module("#open", () => {
+    test("uses the configured WebSocket adapter", assert => {
+      const FakeWebSocket = function() {}
+      ActionCable.adapters.WebSocket = FakeWebSocket
+      const connection = new ActionCable.Connection({})
+      connection.monitor = { start() {} }
+      connection.open()
+      assert.equal(connection.webSocket instanceof FakeWebSocket, true)
+    })
+  })
+})