using System;
using System.Diagnostics;
using System.Reflection;
using NUnit.Framework;
using Sarand.Net.Standard.Base.Utils;

namespace Sarand.UnitTests.Core.Base.Utils
{
	[TestFixture]
	public class SysUtil_Tester
	{
		// --- Data Members ---

		private static readonly String ClassName_GeneratedMemberName_Prefix = "<";
		private static readonly String ClassName_CompilerGeneratedClass = ClassName_GeneratedMemberName_Prefix + ">c";

		// Calling code class name.

		// --- Tests ---

		[Test]
		public void SysUtil_GetCallerClassName_Test()
		{
			// Leading spaces.
			Assert.That(SysUtil.GetCallerClassName(), Is.Not.EqualTo(null));
			Assert.That(SysUtil.GetCallerClassName(), Is.Not.Empty);
			Assert.That(SysUtil.GetCallerClassName(), Is.EqualTo("SysUtil_Tester"));

			// Compiler generated context.
			Func<string> temp = () => { return SysUtil.GetCallerClassName(); };
			Assert.That(temp(), Is.EqualTo(ClassName_CompilerGeneratedClass));

			// Anonymous function.
			Assert.That(((Func<string>)(() => SysUtil.GetCallerClassName()))(), Is.EqualTo(ClassName_CompilerGeneratedClass));
			Assert.That(new Func<string>(() => SysUtil.GetCallerClassName())(), Is.EqualTo(ClassName_CompilerGeneratedClass));
		}

		// Calling code function name.
		[Test]
		public void SysUtil_GetCallerMemberName_Test()
		{
			// Leading spaces.
			Assert.That(SysUtil.GetCallerMemberName(), Is.Not.EqualTo(null));
			Assert.That(SysUtil.GetCallerMemberName(), Is.Not.Empty);
			Assert.That(SysUtil.GetCallerMemberName(), Is.EqualTo("SysUtil_GetCallerMemberName_Test"));
			Assert.That(SysUtil.GetCallerMemberName(), Is.EqualTo(nameof(SysUtil_GetCallerMemberName_Test)));
			Assert.That(SysUtil.GetCallerMemberName(), Is.EqualTo(MethodBase.GetCurrentMethod().Name));

			// Compiler generated context.
			Func<string> temp = () => { return SysUtil.GetCallerMemberName(); };
			Assert.That(temp(), Is.EqualTo(MethodBase.GetCurrentMethod().Name));

			// Anonymous function.
			Assert.That(((Func<string>)(() => SysUtil.GetCallerMemberName()))(), Is.EqualTo(MethodBase.GetCurrentMethod().Name));
			Assert.That(new Func<string>(() => SysUtil.GetCallerMemberName())(), Is.EqualTo(MethodBase.GetCurrentMethod().Name));
		}

		// Calling code file path.
		[Test]
		public void SysUtil_GetCallerFilePath_Test()
		{
			// Leading spaces.
			Assert.That(SysUtil.GetCallerFilePath(), Is.Not.EqualTo(null));
			Assert.That(SysUtil.GetCallerFilePath(), Is.Not.Empty);
			Assert.That(SysUtil.GetCallerFilePath(), Is.EqualTo(@"D:\Sarand\Projects\Users\AHoward\VS2022\Common-VS\Workspace\SacsCoreUnitTests\Standard\Base\Utils\SysUtil_Tester.cs"));
			Assert.That(SysUtil.GetCallerFilePath().EndsWith("SysUtil_Tester.cs"), Is.EqualTo(true));
		}

		// Calling code line number.
		[Test]
		public void SysUtil_GetCallerLineNumber_Test()
		{
			// Leading spaces.
			Assert.That(SysUtil.GetCallerLineNumber(), Is.Not.EqualTo(0));
			Assert.That(SysUtil.GetCallerLineNumber(), Is.EqualTo((new StackFrame(0, true)).GetFileLineNumber()));
		}

		// Calling code file path.
		[Test]
		public void SysUtil_GetCallerClassMethod_Test()
		{
			// Leading spaces.
			Assert.That(SysUtil.GetCallerClassMethod(), Is.Not.EqualTo(null));
			Assert.That(SysUtil.GetCallerClassMethod(), Is.Not.Empty);
			Assert.That(SysUtil.GetCallerClassMethod(), Is.EqualTo(GetType().Name + "." + MethodBase.GetCurrentMethod().Name));
			Assert.That(SysUtil.GetCallerClassMethod(), Is.EqualTo(nameof(SysUtil_Tester) + "." + nameof(SysUtil_GetCallerClassMethod_Test)));
		}

		// Calling code file path.
		[Test]
		public void SysUtil_Fn_Test()
		{
			// Leading spaces.
			Assert.That(SysUtil.Fn, Is.Not.EqualTo(null));
			Assert.That(SysUtil.Fn, Is.Not.Empty);
			Assert.That(SysUtil.Fn, Is.EqualTo(GetType().Name + "." + MethodBase.GetCurrentMethod().Name));
			Assert.That(SysUtil.Fn, Is.EqualTo(nameof(SysUtil_Tester) + "." + nameof(SysUtil_Fn_Test)));
		}

		// --- The End ---
	}
}