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require 'test_helper'
class RruleHumanizerTest < ActiveSupport::TestCase
def humanize(rrule, locale = :de)
Event.new(rrule: rrule).humanize_rrule(locale)
end
test "weekly single day" do
assert_equal "Jeden Dienstag", humanize("FREQ=WEEKLY;BYDAY=TU")
assert_equal "Every Tuesday", humanize("FREQ=WEEKLY;BYDAY=TU", :en)
end
test "weekly two days" do
assert_equal "Jeden Mittwoch und Freitag", humanize("FREQ=WEEKLY;BYDAY=WE,FR")
assert_equal "Every Wednesday and Friday", humanize("FREQ=WEEKLY;BYDAY=WE,FR", :en)
end
test "weekly no byday" do
assert_equal "Wöchentlich", humanize("FREQ=WEEKLY")
assert_equal "Weekly", humanize("FREQ=WEEKLY", :en)
end
test "biweekly with day" do
assert_equal "Alle zwei Wochen donnerstags", humanize("FREQ=WEEKLY;INTERVAL=2;BYDAY=TH")
assert_equal "Every other Thursday", humanize("FREQ=WEEKLY;INTERVAL=2;BYDAY=TH", :en)
end
test "biweekly no day" do
assert_equal "Alle zwei Wochen", humanize("FREQ=WEEKLY;INTERVAL=2")
assert_equal "Every other week", humanize("FREQ=WEEKLY;INTERVAL=2", :en)
end
test "monthly nth weekday" do
assert_equal "Jeden ersten Dienstag im Monat", humanize("FREQ=MONTHLY;BYDAY=1TU")
assert_equal "Jeden zweiten Freitag im Monat", humanize("FREQ=MONTHLY;BYDAY=2FR")
assert_equal "Jeden dritten Sonntag im Monat", humanize("FREQ=MONTHLY;BYDAY=3SU")
assert_equal "Jeden letzten Mittwoch im Monat", humanize("FREQ=MONTHLY;BYDAY=-1WE")
end
test "monthly nth weekday english" do
assert_equal "Every first Tuesday of the month", humanize("FREQ=MONTHLY;BYDAY=1TU", :en)
assert_equal "Every last Wednesday of the month", humanize("FREQ=MONTHLY;BYDAY=-1WE", :en)
end
test "monthly second-to-last" do
assert_equal "Jeden vorletzten Donnerstag im Monat", humanize("FREQ=MONTHLY;BYDAY=-2TH")
assert_equal "Every second-to-last Thursday of the month", humanize("FREQ=MONTHLY;BYDAY=-2TH", :en)
end
test "monthly selected weeks" do
assert_equal "Jeden ersten, zweiten und fünften Dienstag im Monat",
humanize("FREQ=MONTHLY;BYDAY=1TU,2TU,5TU")
assert_equal "Every first, second and fifth Tuesday of the month",
humanize("FREQ=MONTHLY;BYDAY=1TU,2TU,5TU", :en)
end
test "monthly fifth weekday" do
assert_equal "Jeden fünften Dienstag im Monat", humanize("FREQ=MONTHLY;BYDAY=5TU")
assert_equal "Every fifth Tuesday of the month", humanize("FREQ=MONTHLY;BYDAY=5TU", :en)
end
test "monthly weekday excluding one ordinal" do
rrule = "FREQ=MONTHLY;BYDAY=1TU,3TU,4TU,5TU"
assert_equal "Jeden Dienstag im Monat, außer dem zweiten Dienstag", humanize(rrule)
assert_equal "Every Tuesday of the month, except the second Tuesday", humanize(rrule, :en)
end
test "monthly no byday" do
assert_equal "Monatlich", humanize("FREQ=MONTHLY")
assert_equal "Monthly", humanize("FREQ=MONTHLY", :en)
end
test "monthly with single excluded month" do
assert_equal "Jeden letzten Donnerstag im Monat, außer im Dezember",
humanize("FREQ=MONTHLY;BYDAY=-1TH;BYMONTH=1,2,3,4,5,6,7,8,9,10,11")
assert_equal "Every last Thursday of the month, except in December",
humanize("FREQ=MONTHLY;BYDAY=-1TH;BYMONTH=1,2,3,4,5,6,7,8,9,10,11", :en)
end
test "monthly excluding january" do
assert_equal "Jeden zweiten Mittwoch im Monat, außer im Januar",
humanize("FREQ=MONTHLY;BYMONTH=2,3,4,5,6,7,8,9,10,11,12;BYDAY=2WE")
end
test "blank rrule returns nil" do
assert_nil humanize(nil)
assert_nil humanize("")
end
test "count and until are not guessed at" do
assert_nil humanize("FREQ=MONTHLY;BYDAY=1WE;COUNT=36")
assert_nil humanize("FREQ=MONTHLY;BYDAY=1WE;UNTIL=20050105T222222Z")
end
test "unrecognized freq returns nil" do
assert_nil humanize("FREQ=YEARLY;BYMONTH=12")
end
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
test "monthly two selected weeks" do
assert_equal "Jeden ersten und dritten Dienstag im Monat",
humanize("FREQ=MONTHLY;BYDAY=1TU,3TU")
assert_equal "Every first and third Tuesday of the month",
humanize("FREQ=MONTHLY;BYDAY=1TU,3TU", :en)
end
end
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