1 files changed, 116 insertions, 0 deletions
diff --git a/actioncable/test/test_helper_test.rb b/actioncable/test/test_helper_test.rb
new file mode 100644
index 0000000000..02eaefc4f8
--- /dev/null
+++ b/actioncable/test/test_helper_test.rb
@@ -0,0 +1,116 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+class BroadcastChannel < ActionCable::Channel::Base
+end
+
+class TransmissionsTest < ActionCable::TestCase
+  def test_assert_broadcasts
+    assert_nothing_raised do
+      assert_broadcasts("test", 1) do
+        ActionCable.server.broadcast "test", "message"
+      end
+    end
+  end
+
+  def test_assert_broadcasts_with_no_block
+    assert_nothing_raised do
+      ActionCable.server.broadcast "test", "message"
+      assert_broadcasts "test", 1
+    end
+
+    assert_nothing_raised do
+      ActionCable.server.broadcast "test", "message 2"
+      ActionCable.server.broadcast "test", "message 3"
+      assert_broadcasts "test", 3
+    end
+  end
+
+  def test_assert_no_broadcasts_with_no_block
+    assert_nothing_raised do
+      assert_no_broadcasts "test"
+    end
+  end
+
+  def test_assert_no_broadcasts
+    assert_nothing_raised do
+      assert_no_broadcasts("test") do
+        ActionCable.server.broadcast "test2", "message"
+      end
+    end
+  end
+
+  def test_assert_broadcasts_message_too_few_sent
+    ActionCable.server.broadcast "test", "hello"
+    error = assert_raises Minitest::Assertion do
+      assert_broadcasts("test", 2) do
+        ActionCable.server.broadcast "test", "world"
+      end
+    end
+
+    assert_match(/2 .* but 1/, error.message)
+  end
+
+  def test_assert_broadcasts_message_too_many_sent
+    error = assert_raises Minitest::Assertion do
+      assert_broadcasts("test", 1) do
+        ActionCable.server.broadcast "test", "hello"
+        ActionCable.server.broadcast "test", "world"
+      end
+    end
+
+    assert_match(/1 .* but 2/, error.message)
+  end
+
+  def test_assert_no_broadcasts_failure
+    error = assert_raises Minitest::Assertion do
+      assert_no_broadcasts "test" do
+        ActionCable.server.broadcast "test", "hello"
+      end
+    end
+
+    assert_match(/0 .* but 1/, error.message)
+  end
+end
+
+class TransmittedDataTest < ActionCable::TestCase
+  include ActionCable::TestHelper
+
+  def test_assert_broadcast_on
+    assert_nothing_raised do
+      assert_broadcast_on("test", "message") do
+        ActionCable.server.broadcast "test", "message"
+      end
+    end
+  end
+
+  def test_assert_broadcast_on_with_hash
+    assert_nothing_raised do
+      assert_broadcast_on("test", text: "hello") do
+        ActionCable.server.broadcast "test", text: "hello"
+      end
+    end
+  end
+
+  def test_assert_broadcast_on_with_no_block
+    assert_nothing_raised do
+      ActionCable.server.broadcast "test", "hello"
+      assert_broadcast_on "test", "hello"
+    end
+
+    assert_nothing_raised do
+      ActionCable.server.broadcast "test", "world"
+      assert_broadcast_on "test", "world"
+    end
+  end
+
+  def test_assert_broadcast_on_message
+    ActionCable.server.broadcast "test", "hello"
+    error = assert_raises Minitest::Assertion do
+      assert_broadcast_on("test", "world")
+    end
+
+    assert_match(/No messages sent/, error.message)
+  end
+end