Added DNS Records for Zone actions

UnitTests/Cloudflare.Zones.Tests/DnsRecords/ExportDnsRecordsTest.cs

@@ -0,0 +1,67 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using AMWD.Net.Api.Cloudflare;
+using AMWD.Net.Api.Cloudflare.Zones;
+using Moq;
+
+namespace Cloudflare.Zones.Tests.DnsRecords
+{
+	[TestClass]
+	public class ExportDnsRecordsTest
+	{
+		private const string ZoneId = "023e105f4ecef8ad9ca31a8372d0c353";
+
+		private Mock<ICloudflareClient> _clientMock;
+		private CloudflareResponse<string> _response;
+		private List<(string RequestPath, IQueryParameterFilter QueryFilter)> _callbacks;
+
+		[TestInitialize]
+		public void Initialize()
+		{
+			_callbacks = [];
+
+			_response = new CloudflareResponse<string>
+			{
+				Success = true,
+				Result = "This is my BIND export file."
+			};
+		}
+
+		[TestMethod]
+		public async Task ShouldExportZoneDnsRecords()
+		{
+			// Arrange
+			var client = GetClient();
+
+			// Act
+			var response = await client.ExportDnsRecords(ZoneId);
+
+			// Assert
+			Assert.IsNotNull(response);
+			Assert.IsTrue(response.Success);
+			Assert.AreEqual(_response.Result, response.Result);
+
+			Assert.AreEqual(1, _callbacks.Count);
+
+			var callback = _callbacks.First();
+			Assert.AreEqual($"zones/{ZoneId}/dns_records/export", callback.RequestPath);
+			Assert.IsNull(callback.QueryFilter);
+
+			_clientMock.Verify(m => m.GetAsync<string>($"zones/{ZoneId}/dns_records/export", null, It.IsAny<CancellationToken>()), Times.Once);
+			_clientMock.VerifyNoOtherCalls();
+		}
+
+		private ICloudflareClient GetClient()
+		{
+			_clientMock = new Mock<ICloudflareClient>();
+			_clientMock
+				.Setup(m => m.GetAsync<string>(It.IsAny<string>(), It.IsAny<IQueryParameterFilter>(), It.IsAny<CancellationToken>()))
+				.Callback<string, IQueryParameterFilter, CancellationToken>((requestPath, queryFilter, _) => _callbacks.Add((requestPath, queryFilter)))
+				.ReturnsAsync(() => _response);
+
+			return _clientMock.Object;
+		}
+	}
+}