Refactor keybinding tests

There was an order-dependent test failure that plagued a couple of my
recent pull requests:

    Failure:
    Default_keybindings#test_keybinding_unset
      [/home/runner/work/gollum/gollum/test/test_app.rb:1098]
    Minitest::Assertion: Expected: true
      Actual: false

This commit ensures that `default_keybinding` is set to `nil` before
each test, and that the first line of each test changes the
configuration to the setting under test explicitly.

I also refactored the teardown to `nil` out all instance values so
they'll all certainly be reset when the next set of tests is run.

lib/gollum/locales/en.yml

@@ -31,7 +31,7 @@ en:
     title: "Overview of %{ref}"
   precious/views/search:
     aria:
-      show_all: "Show all %{count} hits in this page"
+      show_all: Show all hits on this page
     back_to_top: Back to Top
     no_results: There are no results for your search
     search_results_for: Search results for

test/capybara_helper.rb

@@ -0,0 +1,23 @@
+require_relative 'helper'
+
+require 'selenium-webdriver'
+require 'capybara/dsl'
+
+Selenium::WebDriver::Chrome.path = ENV['CHROME_PATH'] if ENV['CHROME_PATH']
+
+CAPYBARA_DRIVER =
+  if ENV['CI']
+    :selenium_chrome_headless
+  else
+    ENV.fetch('CAPYBARA_DRIVER', :selenium_chrome).to_sym
+  end
+
+Capybara.default_driver = CAPYBARA_DRIVER
+Capybara.enable_aria_label = true
+Capybara.server = :webrick
+
+def console_log(page, level = :severe)
+  page.driver.browser.logs.get(:browser).select { |log| log.level == level.to_s.upcase }
+end
+
+

test/helper.rb

@@ -32,7 +32,6 @@ ENV['RACK_ENV'] = 'test'
 require 'gollum'
 require 'gollum/app'
 
-CAPYBARA_DRIVER = ENV['CI'] ? :selenium_chrome_headless : ENV.fetch('CAPYBARA_DRIVER', :selenium_chrome).to_sym
 
 # Disable the metadata feature
 $METADATA = false

test/integration/test_js_errors.rb

@@ -1,9 +1,4 @@
-require File.expand_path(File.join(File.dirname(__FILE__), '..', 'helper'))
-require 'selenium-webdriver'
-require 'capybara/dsl'
-
-Capybara.default_driver = ::CAPYBARA_DRIVER
-Capybara.server = :webrick
+require_relative '../capybara_helper'
 
 def console_log(page, level = :severe)
   page.driver.browser.logs.get(:browser).select{|log| log.level == level.to_s.upcase }
@@ -21,7 +16,7 @@ end
 
 context 'Frontend with mathjax' do
   include Capybara::DSL
-  
+
   setup do
     @path = cloned_testpath("examples/lotr.git")
     @wiki = Gollum::Wiki.new(@path)
@@ -29,21 +24,21 @@ context 'Frontend with mathjax' do
     Precious::App.set(:wiki_options, {mathjax: true})
     Capybara.app = Precious::App
   end
-  
+
   test 'no unexpected errors on /' do
     visit '/'
     log = console_log(page)
     assert_only_expected_errors(log)
   end
-  
+
   test 'no unexpected errors on /create/' do
     visit '/create/Foobar'
     log = console_log(page)
     assert_only_expected_errors(log)
   end
-  
+
   teardown do
     Capybara.reset_sessions!
     Capybara.use_default_driver
   end
-end
+end

test/integration/test_localization.rb

@@ -0,0 +1,61 @@
+require_relative '../capybara_helper'
+
+context 'Localized frontend' do
+  include Capybara::DSL
+
+  setup do
+    @path = cloned_testpath "examples/lotr.git"
+    @wiki = Gollum::Wiki.new(@path)
+
+    Precious::App.set :gollum_path, @path
+    Precious::App.set :wiki_options, {mathjax: true}
+
+    Capybara.app = Precious::App
+  end
+
+  test 'can visit search results page' do
+    visit '/gollum/search'
+
+    fill_in('Search', with: 'something-to-return-no-results')
+      .native
+      .send_keys(:return)
+
+    assert_includes page.text,
+      'Search results for something-to-return-no-results'
+    assert_includes page.text,
+      'There are no results for your search something-to-return-no-results.'
+
+    click_on 'Back to Top'
+
+    visit '/gollum/search'
+
+    fill_in('Search', with: 'Bilbo').native.send_keys(:return)
+
+    assert_includes page.text, 'Search results for Bilbo'
+
+    click_on 'Show all hits on this page'
+    click_on 'Bilbo-Baggins.md'
+
+    assert page.current_path, '/Bilbo-Baggins.md'
+  end
+
+  test 'can visit overview page' do
+    visit "/gollum/overview"
+
+    assert_includes page.text, 'Overview of master'
+    assert_includes page.text, 'Home'
+
+    click_on 'Back to Top'
+    click_on 'Bilbo-Baggins.md'
+
+    assert page.current_path, '/Bilbo-Baggins.md'
+  end
+
+  teardown do
+    @path = nil
+    @wiki = nil
+
+    Capybara.reset_sessions!
+    Capybara.use_default_driver
+  end
+end

test/test_app.rb

@@ -1082,59 +1082,68 @@ context "Default keybindings" do
   include Rack::Test::Methods
 
   setup do
-    @path = cloned_testpath("examples/empty.git")
-    @wiki = Gollum::Wiki.new(@path)
+    @path = cloned_testpath "examples/empty.git"
+    @wiki = Gollum::Wiki.new @path
     @url = '/gollum/create/test'
-    Precious::App.set(:gollum_path, @path)
+
+    Precious::App.set :gollum_path, @path
+    Precious::App.set :wiki_options, {default_keybinding: nil}
   end
 
   teardown do
-    FileUtils.rm_rf(@path)
-    Precious::App.set(:wiki_options, {default_keybinding: nil})
+    FileUtils.rm_rf @path
+
+    @path = nil
+    @wiki = nil
+    @url = nil
   end
 
   test 'keybinding unset' do
     get @url
+
     assert_equal last_response.body.include?('selected="selected" value="default"'), false
     assert_equal last_response.body.include?('selected="selected" value="vim"'), false
     assert_equal last_response.body.include?('selected="selected" value="emacs"'), false
   end
 
-  test 'keybinding `dne`' do
-    # dne := does not exist
-    Precious::App.set(:wiki_options, {:default_keybinding => 'dne'})
+  test 'nonexistent keybinding' do
+    Precious::App.set :wiki_options, {:default_keybinding => 'does-not-exist'}
+
     get @url
+
     assert_equal last_response.body.include?('selected="selected" value="default"'), false
     assert_equal last_response.body.include?('selected="selected" value="vim"'), false
     assert_equal last_response.body.include?('selected="selected" value="emacs"'), false
-    Precious::App.set(:wiki_options, {:default_keybinding => 'none'})
   end
 
   test 'keybinding `default`' do
-    Precious::App.set(:wiki_options, {:default_keybinding => 'default'})
+    Precious::App.set :wiki_options, {:default_keybinding => 'default'}
+
     get @url
+
     assert_equal last_response.body.include?('selected="selected" value="default"'), true
     assert_equal last_response.body.include?('selected="selected" value="vim"'), false
     assert_equal last_response.body.include?('selected="selected" value="emacs"'), false
-    Precious::App.set(:wiki_options, {:default_keybinding => 'none'})
   end
 
   test 'keybinding `vim`' do
-    Precious::App.set(:wiki_options, {:default_keybinding => 'vim'})
+    Precious::App.set :wiki_options, {:default_keybinding => 'vim'}
+
     get @url
+
     assert_equal last_response.body.include?('selected="selected" value="default"'), false
     assert_equal last_response.body.include?('selected="selected" value="vim"'), true
     assert_equal last_response.body.include?('selected="selected" value="emacs"'), false
-    Precious::App.set(:wiki_options, {:default_keybinding => 'none'})
   end
 
   test 'keybinding `emacs`' do
-    Precious::App.set(:wiki_options, {:default_keybinding => 'emacs'})
+    Precious::App.set :wiki_options, {:default_keybinding => 'emacs'}
+
     get @url
+
     assert_equal last_response.body.include?('selected="selected" value="default"'), false
     assert_equal last_response.body.include?('selected="selected" value="vim"'), false
     assert_equal last_response.body.include?('selected="selected" value="emacs"'), true
-    Precious::App.set(:wiki_options, {:default_keybinding => 'none'})
   end
 
   def app