Added support for csproj's import tag. (#73)

Author: Soarc

src/SpecFlow.NetCore/AppConfig.cs

@@ -1,9 +1,11 @@
 using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Xml.Linq;
 using System.Xml.XPath;
 using static System.Console;
+using IOPath = System.IO.Path;
 
 namespace SpecFlow.NetCore
 {
@@ -99,11 +101,7 @@ public void Validate(FileInfo csproj)
 
 		private static string GetProjectTestRunner(string csproj)
 		{			
-			var project = XElement.Load(csproj);
-			var packageReferences = project
-				.Descendants("PackageReference")
-				.Select(e => e.Attribute("Include")?.Value)
-				.ToList();
+			var packageReferences = GetProjectPackageReferences(csproj).ToList();
 
 			if (packageReferences.Contains("xunit"))
 			{
@@ -125,5 +123,26 @@ private static string GetProjectTestRunner(string csproj)
 
 			throw new Exception($"{csproj} does not contain a reference to mstest, xunit or nunit");
 		}
+
+		private static IEnumerable<string> GetProjectPackageReferences(string csproj)
+		{
+			var project = XElement.Load(csproj);
+			var packageReferences = project
+				.Descendants("PackageReference")
+				.Select(e => e.Attribute("Include")?.Value);
+
+			var csprojdirectory = IOPath.GetDirectoryName(csproj);
+			var imports = project
+				.Descendants("Import")
+				.Select(e => IOPath.Combine(csprojdirectory, e.Attribute("Project").Value));
+
+			foreach (var import in imports)
+			{
+				packageReferences = packageReferences.Concat(GetProjectPackageReferences(import));
+			}
+
+			return packageReferences;
+		}
+
 	}
 }

src/SpecFlow.NetCore/Fixer.cs

@@ -65,13 +65,34 @@ private static bool TryGetSpecFlowVersion(FileInfo csproj, out string version)
 			var node = root.SelectSingleNode("//ItemGroup/PackageReference[translate(@Include, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz')='specflow']"); // case-insensitive for XPath version 1.0
 			if (node == null)
 			{
+				if (TryGetSpecflowVersionFromImports(csproj, root, out version))
+					return true;
+				
 				version = default(string);
 				return false;
 			}
 			version = node.Attributes["Version"].Value;
 			return true;
 		}
 
+		private static bool TryGetSpecflowVersionFromImports(FileInfo csproj, XmlElement root, out string version)
+		{
+			var importNodes = root.SelectNodes("//Import");
+			foreach (XmlNode import in importNodes)
+			{
+				var relativePath = import.Attributes["Project"].Value;
+				var fullPath = Path.Combine(csproj.DirectoryName, relativePath);
+				if (!File.Exists(fullPath))
+					continue;
+				var importInfo = new FileInfo(fullPath);
+				if (TryGetSpecFlowVersion(importInfo, out version))
+					return true;
+			}
+
+			version = default(string);
+			return false;
+		}
+
 		public IEnumerable<FileInfo> GetFeatureFromLinks(FileInfo csproj)
 		{
 			var doc = new XmlDocument();
@@ -126,8 +147,7 @@ private void EnsureSpecFlow(FileInfo csproj)
 		{
 			if (string.IsNullOrWhiteSpace(_specFlowExe))
 			{
-				string specFlowVersion;
-				if (!TryGetSpecFlowVersion(csproj, out specFlowVersion))
+				if (!TryGetSpecFlowVersion(csproj, out string specFlowVersion))
 				{
 					throw new XmlException("Could not get SpecFlow version from: " + csproj.FullName);
 				}