#region Apache License
//
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to you under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#endregion

using System;
using System.IO;
using System.Text;
using log4net.DateFormatter;
using NUnit.Framework;

namespace log4net.Tests.DateFormatter
{

	[TestFixture]
	public class AbsoluteTimeDateFormatterTest
	{

		[TearDown]
		public void resetCounts()
		{
			FormatterOne.invocations = 0;
		}

		[Test]
		public void CacheWorksForSameTicks()
		{
			StringWriter sw = new StringWriter();
			FormatterOne f1 = new FormatterOne();
			FormatterOne f2 = new FormatterOne();
			DateTime dt = DateTime.Now;
			f1.FormatDate(dt, sw);
			f2.FormatDate(dt, sw);
			Assert.AreEqual(1, FormatterOne.invocations);
		}

		[Test]
		public void CacheWorksForSameSecond()
		{
			StringWriter sw = new StringWriter();
			FormatterOne f1 = new FormatterOne();
			FormatterOne f2 = new FormatterOne();
			DateTime dt1 = DateTime.Today;
			DateTime dt2 = dt1.AddMilliseconds(600);
			f1.FormatDate(dt1, sw);
			f2.FormatDate(dt2, sw);
			Assert.AreEqual(1, FormatterOne.invocations);
		}

		[Test]
		public void CacheExpiresWhenCrossingSecond()
		{
			StringWriter sw = new StringWriter();
			FormatterOne f1 = new FormatterOne();
			FormatterOne f2 = new FormatterOne();
			DateTime dt1 = DateTime.Today.AddMinutes(1);
			DateTime dt2 = dt1.AddMilliseconds(1100);
			f1.FormatDate(dt1, sw);
			f2.FormatDate(dt2, sw);
			Assert.AreEqual(2, FormatterOne.invocations);
		}

		[Test]
		public void CacheIsLocalToSubclass()
		{
			StringWriter sw = new StringWriter();
			FormatterOne f1 = new FormatterOne();
			FormatterTwo f2 = new FormatterTwo();
			DateTime dt1 = DateTime.Today.AddMinutes(10);
			f1.FormatDate(dt1, sw);
			f2.FormatDate(dt1, sw);
			Assert.AreEqual(2, FormatterOne.invocations);
		}
	}

	internal class FormatterOne : AbsoluteTimeDateFormatter
	{
		internal static int invocations = 0;

		override protected void FormatDateWithoutMillis(DateTime dateToFormat,
														StringBuilder buffer)
		{
			invocations++;
		}

	}

	internal class FormatterTwo : FormatterOne
	{
	}
}