3 files changed, 40 insertions, 0 deletions

diff --git a/test/models/concerns/rrule_humanizer_test.rb b/test/models/concerns/rrule_humanizer_test.rb
index 500dbc7..279ff73 100644
--- a/test/models/concerns/rrule_humanizer_test.rb
+++ b/test/models/concerns/rrule_humanizer_test.rb
@@ -81,4 +81,19 @@ class RruleHumanizerTest < ActiveSupport::TestCase
   test "falls back to english for unknown locale" do
     assert_equal "Every Tuesday", humanize("FREQ=WEEKLY;BYDAY=TU", :fr)
   end
+
+  test "wday_abbr returns the correct German abbreviation for each day" do
+    monday = Time.parse("2026-07-06") # confirmed Monday
+    assert_equal "Mo", RruleHumanizer.wday_abbr(monday, :de)
+    assert_equal "Di", RruleHumanizer.wday_abbr(monday + 1.day, :de)
+    assert_equal "Mi", RruleHumanizer.wday_abbr(monday + 2.days, :de)
+    assert_equal "Do", RruleHumanizer.wday_abbr(monday + 3.days, :de)
+    assert_equal "Fr", RruleHumanizer.wday_abbr(monday + 4.days, :de)
+    assert_equal "Sa", RruleHumanizer.wday_abbr(monday + 5.days, :de)
+    assert_equal "So", RruleHumanizer.wday_abbr(monday + 6.days, :de)
+  end
+
+  test "wday_abbr falls back to :de for an unrecognized locale" do
+    assert_equal "Mo", RruleHumanizer.wday_abbr(Time.parse("2026-07-06"), :fr)
+  end
 end
diff --git a/test/models/helpers/content_helper_test.rb b/test/models/helpers/content_helper_test.rb
index 2da82d7..a7ed478 100644
--- a/test/models/helpers/content_helper_test.rb
+++ b/test/models/helpers/content_helper_test.rb
@@ -1,4 +1,8 @@
 require 'test_helper'
 
 class ContentHelperTest < ActionView::TestCase
+  test "weekday_abbr delegates through the current I18n locale" do
+    I18n.locale = :de
+    assert_equal "Mo", weekday_abbr(Time.parse("2026-07-06"))
+  end
 end
diff --git a/test/models/helpers/nodes_helper_test.rb b/test/models/helpers/nodes_helper_test.rb
index 13011de..5d91a88 100644
--- a/test/models/helpers/nodes_helper_test.rb
+++ b/test/models/helpers/nodes_helper_test.rb
@@ -1,4 +1,25 @@
 require 'test_helper'
 
 class NodesHelperTest < ActionView::TestCase
+  FakePage = Struct.new(:tag_list)
+
+  test "default_event_tag_mapping matches erfa-detail" do
+    page = FakePage.new(["erfa-detail"])
+    assert_equal ["erfa-detail", "open-day"], default_event_tag_mapping(page)
+  end
+
+  test "default_event_tag_mapping matches chaostreff-detail" do
+    page = FakePage.new(["chaostreff-detail"])
+    assert_equal ["chaostreff-detail", "open-day"], default_event_tag_mapping(page)
+  end
+
+  test "default_event_tag_mapping returns nil for unrelated tags" do
+    page = FakePage.new(["update"])
+    assert_nil default_event_tag_mapping(page)
+  end
+
+  test "default_event_tag_list is nil without a matching tag" do
+    page = FakePage.new([])
+    assert_nil default_event_tag_list(page)
+  end
 end