Added support for can get guide rates for the LX200GPS

Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs

@@ -163,7 +163,7 @@ namespace Meade.net.Telescope.UnitTests
 
             var exception = Assert.Throws<InvalidValueException>(() => { _telescope.Action("site", site); });
 
-            Assert.That(exception.Message, Is.EqualTo($"Site {site} not allowed must be between 1 and 4"));
+            Assert.That(exception.Message, Is.EqualTo($"Site {site} not allowed, must be between 1 and 4"));
         }
 
         [Test]
@@ -618,13 +618,34 @@ namespace Meade.net.Telescope.UnitTests
         }
 
         [Test]
-        public void CanSetGuideRates_Get_ReturnsFalse()
+        public void CanSetGuideRates_Get_WhenNotConnected_ThenThrowsException()
         {
+            var exception = Assert.Throws<NotConnectedException>(() => { var result = _telescope.CanSetGuideRates; });
+            Assert.That(exception.Message, Is.EqualTo("Not connected to telescope when trying to execute: CanSetGuideRates Get"));
+        }
+        
+        [Test]
+        public void CanSetGuideRates_Get_WhenConnectedToAutostar_ThenReturnsFalse()
+        {
+            ConnectTelescope();
+
             var result = _telescope.CanSetGuideRates;
 
             Assert.That(result, Is.False);
         }
 
+        [Test]
+        public void CanSetGuideRates_Get_WhenConnectedToLX200GPS_ThenReturnsTrue()
+        {
+            _sharedResourcesWrapperMock.Setup(x => x.ProductName).Returns(() => TelescopeList.LX200GPS);
+            _sharedResourcesWrapperMock.Setup(x => x.FirmwareVersion).Returns(() => TelescopeList.LX200GPS_42G);
+            _telescope.Connected = true;
+
+            var result = _telescope.CanSetGuideRates;
+
+            Assert.That(result, Is.True);
+        }
+
         [Test]
         public void CanSetPark_Get_ReturnsFalse()
         {

Meade.net.Telescope/Telescope.cs

@@ -253,7 +253,7 @@ namespace ASCOM.Meade.net
                             break;
                         default:
                             LogMessage("", "Action {0}, parameters {1} not implemented", actionName, actionParameters);
-                            throw new InvalidValueException($"Site {actionParameters} not allowed must be between 1 and 4");
+                            throw new InvalidValueException($"Site {actionParameters} not allowed, must be between 1 and 4");
 
                     }
 
@@ -755,8 +755,12 @@ namespace ASCOM.Meade.net
         {
             get
             {
-                LogMessage("CanSetGuideRates", "Get - " + false.ToString());
-                return false;
+                CheckConnected("CanSetGuideRates Get");
+
+                var canSetGuideRate = IsGuideRateSettingSupported();
+
+                LogMessage("CanSetGuideRates", "Get - " + canSetGuideRate.ToString());
+                return canSetGuideRate;
             }
         }