using System;
using System.Threading;
using NUnit.Framework;

namespace Developpez.Dotnet.Tests {
    [TestFixture]
    public class TemporaryStringTests {

        #region Constructors

        [Test]
        public void ParameterLessConstructor() {
            TemporaryString ts = new TemporaryString();
            Assert.IsNotNull(ts);
        }

        [Test]
        public void LifetimeConstructor() {
            TemporaryString ts = new TemporaryString(5000);
            Assert.IsNotNull(ts);
        }

        [Test]
        public void ValueConstructor() {
            TemporaryString ts = new TemporaryString("foo");
            Assert.IsNotNull(ts);
        }

        [Test]
        public void LifetimeAndValueConstructor() {
            TemporaryString ts = new TemporaryString(5000, "foo");
            Assert.IsNotNull(ts);
        }

        [Test]
        public void ArgumentExceptionConstructor() {

            TemporaryString ts;
            Assert.Throws<ArgumentOutOfRangeException>(
                () => ts = new TemporaryString(-1));
        }

        [Test]
        public void ArgumentNullExceptionConstructor() {

            TemporaryString ts;
            Assert.Throws<ArgumentNullException>(
                () => ts = new TemporaryString(null));
        }

        #endregion

        #region Append methods

        [Test]
        public void AppendCharMethod() {
            TemporaryString ts = new TemporaryString();
            ts.Append('f');
            Assert.AreEqual("f", ts.ToString());
        }

        [Test]
        public void AppendCharArrayMethod() {
            TemporaryString ts = new TemporaryString();
            ts.Append("foo".ToCharArray());
            Assert.AreEqual("foo", ts.ToString());
        }

        [Test]
        public void AppendStringMethod() {
            TemporaryString ts = new TemporaryString();
            ts.Append("foo");
            Assert.AreEqual("foo", ts.ToString());
        }

        #endregion

        #region ToString method

        [Test]
        public void ToStringMethod() {
            TemporaryString ts = new TemporaryString("foo");
            Assert.AreEqual("foo", ts.ToString());
        }

        #endregion

        #region Lifetime elapsed event

        [Test]
        public void LifetimeElapsedEvent() {
            TemporaryString ts = new TemporaryString(500, "foo");
            Assert.AreEqual("foo", ts.ToString());
            Thread.Sleep(1000);
            Assert.AreEqual(string.Empty, ts.ToString());
        }

        #endregion

    }
}