using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.Text;
using NUnit.Framework;

namespace Developpez.Dotnet.Tests
{
    [TestFixture]
    public class ExceptionExtensionsTests
    {
        [Test]
        public void IsCausedBy_ReturnsTrueForExceptionOfSpecifiedType()
        {
            var ex = new FooException("Foo");
            Assert.IsTrue(ex.IsCausedBy<FooException>());
        }

        [Test]
        public void IsCausedBy_ReturnsFalseForExceptionNotOfSpecifiedTypeWithNoInnerException()
        {
            var ex = new FooException("Foo");
            Assert.IsFalse(ex.IsCausedBy<BarException>());
        }

        [Test]
        public void IsCausedBy_ReturnsTrueForExceptionNotOfSpecifiedTypeWithInnerExceptionOfSpecifiedType()
        {
            var ex = new FooException("Foo", new BarException("Bar"));
            Assert.IsTrue(ex.IsCausedBy<FooException>());
            Assert.IsTrue(ex.IsCausedBy<BarException>());
        }

        [Test]
        public void IsCausedBy_ReturnsTrueForExceptionNotOfSpecifiedTypeWithDeepInnerExceptionOfSpecifiedType()
        {
            var ex = new FooException("Foo", new BarException("Bar", new BazException("Baz")));
            Assert.IsTrue(ex.IsCausedBy<FooException>());
            Assert.IsTrue(ex.IsCausedBy<BarException>());
            Assert.IsTrue(ex.IsCausedBy<BazException>());
        }

        [Serializable]
        class FooException : Exception
        {
            public FooException()
            {
            }

            public FooException(string message) : base(message)
            {
            }

            public FooException(string message, Exception inner) : base(message, inner)
            {
            }

            protected FooException(
                SerializationInfo info,
                StreamingContext context) : base(info, context)
            {
            }
        }

        [Serializable]
        class BarException : Exception
        {
            public BarException()
            {
            }

            public BarException(string message) : base(message)
            {
            }

            public BarException(string message, Exception inner) : base(message, inner)
            {
            }

            protected BarException(
                SerializationInfo info,
                StreamingContext context) : base(info, context)
            {
            }
        }

        [Serializable]
        class BazException : Exception
        {
            public BazException()
            {
            }

            public BazException(string message) : base(message)
            {
            }

            public BazException(string message, Exception inner) : base(message, inner)
            {
            }

            protected BazException(
                SerializationInfo info,
                StreamingContext context) : base(info, context)
            {
            }
        }
    }
}