From 28c4cc7cee75afc10ef9d3461de39ab888ea056b Mon Sep 17 00:00:00 2001
From: Mike Dalessio <mike@37signals.com>
Date: Thu, 28 Aug 2025 11:44:51 -0400
Subject: [PATCH] test: backfill hotkeys helper tests

and remove support for the unused use case of comma-delimited-strings
---
 app/helpers/hotkeys_helper.rb       | 25 ++++++--------
 test/helpers/hotkeys_helper_test.rb | 52 +++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+), 15 deletions(-)
 create mode 100644 test/helpers/hotkeys_helper_test.rb

diff --git a/app/helpers/hotkeys_helper.rb b/app/helpers/hotkeys_helper.rb
index 7bd0424d1..48f3cc6f7 100644
--- a/app/helpers/hotkeys_helper.rb
+++ b/app/helpers/hotkeys_helper.rb
@@ -1,19 +1,14 @@
 module HotkeysHelper
+  # Pass in an array of chorded keys, e.g. ["ctrl", "shift", "J"]
   def hotkey_label(hotkey)
-    hotkey.split(",").first if hotkey
-    case hotkey
-    when Array
-      hotkey.map { |key|
-        if key == "ctrl" && platform.mac?
-          "⌘"
-        elsif key == "enter"
-          platform.mac? ? "return" : "enter"
-        else
-          key
-        end
-      }.join()
-    else
-      hotkey.split(",").first if hotkey
-    end
+    hotkey.map do |key|
+      if key == "ctrl" && platform.mac?
+        "⌘"
+      elsif key == "enter"
+        platform.mac? ? "return" : "enter"
+      else
+        key
+      end
+    end.join()
   end
 end
diff --git a/test/helpers/hotkeys_helper_test.rb b/test/helpers/hotkeys_helper_test.rb
new file mode 100644
index 000000000..ebade4aa5
--- /dev/null
+++ b/test/helpers/hotkeys_helper_test.rb
@@ -0,0 +1,52 @@
+require "test_helper"
+
+class HotkeysHelperTest < ActionView::TestCase
+  include SetPlatform
+
+  test "mac modifier key" do
+    emulate_mac
+
+    assert_equal "⌘J", hotkey_label([ "⌘", "J" ])
+  end
+
+  test "linux modifier key" do
+    emulate_linux
+
+    assert_equal "ctrlJ", hotkey_label([ "ctrl", "J" ])
+  end
+
+  test "mac enter" do
+    emulate_mac
+
+    assert_equal "returnJ", hotkey_label([ "enter", "J" ])
+  end
+
+  test "linux enter" do
+    emulate_linux
+
+    assert_equal "enterJ", hotkey_label([ "enter", "J" ])
+  end
+
+  test "mac hyper" do
+    emulate_mac
+
+    assert_equal "hyperJ", hotkey_label([ "hyper", "J" ])
+  end
+
+  test "linux hyper" do
+    emulate_linux
+
+    assert_equal "hyperJ", hotkey_label([ "hyper", "J" ])
+  end
+
+  private
+    def emulate_mac
+      stub_platform = ApplicationPlatform.new("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36")
+      self.stubs(:platform).returns(stub_platform)
+    end
+
+    def emulate_linux
+      stub_platform = ApplicationPlatform.new("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36")
+      self.stubs(:platform).returns(stub_platform)
+    end
+end