Refactoring

Author: stajs

samples/VS2015/SpecFlow 2.1.0/net461/Sample.Website.Tests/project.json

@@ -11,8 +11,8 @@
 		"Sample.Website": "1.0.0-*",
 		"SpecFlow": "2.1.0",
 		"xunit": "2.2.0-beta2-build3300",
-    "dotnet-test-xunit": "2.2.0-*",
-    "SpecFlow.NetCore": "1.0.0-rc3"
+		"dotnet-test-xunit": "2.2.0-*",
+		"SpecFlow.NetCore": "1.0.0-rc3"
 	},
 
 	"tools": {

src/SpecFlow.NetCore/AppConfig.cs

@@ -0,0 +1,78 @@
+using System;
+using System.IO;
+using System.Xml.Linq;
+using System.Xml.XPath;
+using static System.Console;
+
+namespace SpecFlow.NetCore
+{
+	internal class AppConfig
+	{
+		#region Ignore the strange indentation; it is like that so the final file looks right.
+		public const string SpecFlowSectionDefinitionType = "TechTalk.SpecFlow.Configuration.ConfigurationSectionHandler, TechTalk.SpecFlow";
+
+		public const string SpecFlowSectionDefinition = @"	<configSections>
+		<section name=""specFlow"" type=""" + SpecFlowSectionDefinitionType + @""" />
+	</configSections>";
+
+		public const string SpecFlowSectionElement = "unitTestProvider";
+
+		public const string SpecFlowSection = @"	<specFlow>
+		<" + SpecFlowSectionElement + @" name=""xUnit"" />
+	</specFlow>";
+		#endregion
+
+		public string Path { get; }
+
+		public AppConfig(string path)
+		{
+			Path = path;
+		}
+
+		public static AppConfig CreateIn(DirectoryInfo directory)
+		{
+			var config = new AppConfig(System.IO.Path.Combine(directory.FullName, "app.config"));
+
+			if (File.Exists(config.Path))
+				return config;
+
+			WriteLine("Generating app.config.");
+
+			// Ignore the strange indentation; it is like that so the final file looks right.
+			var content = $@"<?xml version=""1.0"" encoding=""utf-8""?>
+<configuration>
+{SpecFlowSectionDefinition}
+{SpecFlowSection}
+</configuration>";
+
+			WriteLine(content);
+			WriteLine("Saving: " + config.Path);
+			File.WriteAllText(config.Path, content);
+
+			return config;
+		}
+
+		public void Validate()
+		{
+			WriteLine("Validating app.config.");
+
+			// I would rather use the ConfigurationBuilder, but as of beta8 it fails to read an element without
+			// a value, e.g.: <unitTestProvider name="xUnit" />
+			//var config = new ConfigurationBuilder()
+			//	.AddXmlFile(path)
+			//	.Build();
+
+			var file = XDocument.Load(Path);
+
+			var definitionType = file.XPathEvaluate("string(/configuration/configSections/section[@name='specFlow']/@type)") as string;
+
+			if (definitionType != SpecFlowSectionDefinitionType)
+				throw new Exception("Couldn't find required SpecFlow section handler in app.config. Example:\n" + SpecFlowSectionDefinition);
+
+			var element = file.XPathEvaluate("string(/configuration/specFlow/unitTestProvider/@name)") as string;
+
+			if (string.IsNullOrWhiteSpace(element))
+				throw new Exception("Couldn't find required SpecFlow element in app.config. Example:\n" + SpecFlowSection);
+		}
+	}
+}