Fixed tests on mono

- Skipped encypted XML test on mono
- Handle different error messages on mono (filed bugs)

Author: davidfowl

test/Microsoft.Framework.ConfigurationModel.Test/EnvironmentVariablesConfigurationSourceTest.cs

@@ -109,7 +109,10 @@ public void ThrowExceptionWhenKeyIsDuplicatedInAzureEnvironment()
                     {"SQLCONNSTR_db2", "SQLConnStr"},
                 };
             var envConfigSrc = new EnvironmentVariablesConfigurationSource();
-            var expectedMsg = "An item with the same key has already been added.";
+
+            // On mono the exception message is different 
+            var isMono = Type.GetType("Mono.Runtime") != null; 
+            var expectedMsg = isMono ? "An element with the same key already exists in the dictionary." : "An item with the same key has already been added.";
 
             var exception = Assert.Throws<ArgumentException>(() => envConfigSrc.Load(dict));
 

test/Microsoft.Framework.ConfigurationModel.Xml.Test/XmlConfigurationSourceTest.AspNet50.cs

@@ -8,13 +8,15 @@
 using System.Security.Cryptography;
 using System.Security.Cryptography.Xml;
 using System.Xml;
+using Microsoft.AspNet.Testing.xunit;
 using Xunit;
 
 namespace Microsoft.Framework.ConfigurationModel
 {
     public partial class XmlConfigurationSourceTest
     {
-        [Fact]
+        [ConditionalFact]
+        [FrameworkSkipCondition(RuntimeFrameworks.Mono)]
         public void LoadKeyValuePairsFromValidEncryptedXml()
         {
             var xml = @"

test/Microsoft.Framework.ConfigurationModel.Xml.Test/XmlConfigurationSourceTest.cs

@@ -299,7 +299,8 @@ public void ThrowExceptionWhenFindDTD()
                     </Data>
                 </settings>";
             var xmlConfigSrc = new XmlConfigurationSource(ArbitraryFilePath);
-            var expectedMsg = "For security reasons DTD is prohibited in this XML document. "
+            var isMono = Type.GetType("Mono.Runtime") != null;
+            var expectedMsg = isMono ? "Document Type Declaration (DTD) is prohibited in this XML.  Line 1, position 10." : "For security reasons DTD is prohibited in this XML document. "
                 + "To enable DTD processing set the DtdProcessing property on XmlReaderSettings "
                 + "to Parse and pass the settings into XmlReader.Create method.";
 

test/Microsoft.Framework.ConfigurationModel.Xml.Test/project.json

@@ -2,6 +2,7 @@
   "dependencies": {
     "Microsoft.Framework.ConfigurationModel.Xml": "1.0.0-*",
     "Microsoft.Framework.ConfigurationModel.Test.Common": "1.0.0-*",
+    "Microsoft.AspNet.Testing": "1.0.0-*",
     "xunit.runner.aspnet": "2.0.0-aspnet-*"
   },
   "frameworks": {