From 181b966e7553ac53d034266a7cdc18664d080814 Mon Sep 17 00:00:00 2001
From: Anton Davydov <antondavydov.o@gmail.com>
Date: Tue, 2 Jul 2019 14:33:12 +0100
Subject: Add a missing tests for Logger::Period module

Closes: https://github.com/ruby/ruby/pull/2266
---
 test/logger/test_logperiod.rb | 85 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 test/logger/test_logperiod.rb

diff --git a/test/logger/test_logperiod.rb b/test/logger/test_logperiod.rb
new file mode 100644
index 0000000000..ba7c26cf59
--- /dev/null
+++ b/test/logger/test_logperiod.rb
@@ -0,0 +1,85 @@
+# coding: US-ASCII
+# frozen_string_literal: false
+require 'test/unit'
+require 'logger'
+require 'time'
+
+class TestLogPeriod < Test::Unit::TestCase
+  def test_next_rotate_time
+    time = Time.parse("2019-07-18 13:52:02 +0100")
+
+    daily_result = Logger::Period.next_rotate_time(time, 'daily')
+    next_day = Time.parse("2019-07-19 00:00:00 +0100")
+    assert_equal(next_day, daily_result)
+
+    weekly_result = Logger::Period.next_rotate_time(time, 'weekly')
+    next_week = Time.parse("2019-07-21 00:00:00 +0100")
+    assert_equal(next_week, weekly_result)
+
+    monthly_result = Logger::Period.next_rotate_time(time, 'monthly')
+    next_month = Time.parse("2019-08-1 00:00:00 +0100")
+    assert_equal(next_month, monthly_result)
+
+    result = Logger::Period.next_rotate_time(time, 'invalid')
+    assert_equal(time, result)
+  end
+
+  def test_next_rotate_time_extreme_cases
+    # First day of Month and Saturday
+    time = Time.parse("2018-07-01 00:00:00 +0100")
+
+    daily_result = Logger::Period.next_rotate_time(time, 'daily')
+    next_day = Time.parse("2018-07-02 00:00:00 +0100")
+    assert_equal(next_day, daily_result)
+
+    weekly_result = Logger::Period.next_rotate_time(time, 'weekly')
+    next_week = Time.parse("2018-07-08 00:00:00 +0100")
+    assert_equal(next_week, weekly_result)
+
+    monthly_result = Logger::Period.next_rotate_time(time, 'monthly')
+    next_month = Time.parse("2018-08-1 00:00:00 +0100")
+    assert_equal(next_month, monthly_result)
+
+    result = Logger::Period.next_rotate_time(time, 'invalid')
+    assert_equal(time, result)
+  end
+
+  def test_previous_period_end
+    time = Time.parse("2019-07-18 13:52:02 +0100")
+
+    daily_result = Logger::Period.previous_period_end(time, 'daily')
+    day_ago = Time.parse("2019-07-17 23:59:59 +0100")
+    assert_equal(day_ago, daily_result)
+
+    weekly_result = Logger::Period.previous_period_end(time, 'weekly')
+    week_ago = Time.parse("2019-07-13 23:59:59 +0100")
+    assert_equal(week_ago, weekly_result)
+
+    monthly_result = Logger::Period.previous_period_end(time, 'monthly')
+    month_ago = Time.parse("2019-06-30 23:59:59 +0100")
+    assert_equal(month_ago, monthly_result)
+
+    result = Logger::Period.previous_period_end(time, 'invalid')
+    assert_equal(time, result)
+  end
+
+  def test_previous_period_end_extreme_cases
+    # First day of Month and Saturday
+    time = Time.parse("2018-07-01 00:00:00 +0100")
+
+    daily_result = Logger::Period.previous_period_end(time, 'daily')
+    day_ago = Time.parse("2018-06-30 23:59:59 +0100")
+    assert_equal(day_ago, daily_result)
+
+    weekly_result = Logger::Period.previous_period_end(time, 'weekly')
+    week_ago = Time.parse("2018-06-30 23:59:59 +0100")
+    assert_equal(week_ago, weekly_result)
+
+    monthly_result = Logger::Period.previous_period_end(time, 'monthly')
+    month_ago = Time.parse("2018-06-30 23:59:59 +0100")
+    assert_equal(month_ago, monthly_result)
+
+    result = Logger::Period.previous_period_end(time, 'invalid')
+    assert_equal(time, result)
+  end
+end
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