Adding test for new pass

src/Generator.Tests/Passes/TestPasses.cs

@@ -18,6 +18,20 @@ namespace CppSharp.Generator.Tests.Passes
             passBuilder = new PassBuilder<TranslationUnitPass>(Driver.Context);
         }
 
+        [Test]
+        public void TestExtractInterfacePass()
+        {
+            var c = AstContext.Class("TestExtractInterfacePass");
+
+            Assert.IsNull(c.GetInterface());
+
+            passBuilder.AddPass(new ExtractInterfacePass());
+            passBuilder.RunPasses(pass => pass.VisitASTContext(AstContext));
+
+            Assert.IsNotNull(c.GetInterface());
+            Assert.AreEqual("ITestExtractInterfacePass", c.GetInterface().Name);
+        }
+
         [Test]
         public void TestCheckFlagEnumsPass()
         {

src/Generator/Passes/ExtractInterfacePass.cs

@@ -9,15 +9,12 @@ namespace CppSharp.Passes
     public class ExtractInterfacePass : TranslationUnitPass
     {
         /// <summary>
-        /// Collects all interfaces in a unit to be added at the end 
+        /// Creates interface from generated classes
-        /// because the unit cannot be changed while it's being iterated though.
-        /// We also need it to check if a class already has a complementary interface
-        /// because different classes may have the same secondary bases.
         /// </summary>
         private readonly HashSet<Class> interfaces = new HashSet<Class>();
 
         /// <summary>
-        /// Change and implement secondary bases at the end to avoid processing implementations.
+        /// Classes that require interfaces to be created
         /// </summary>
         private readonly HashSet<Class> classesNeedingInterface = new HashSet<Class>();
 
@@ -56,7 +53,6 @@ namespace CppSharp.Passes
             }
 
             classesNeedingInterface.Add(@class);
-            Console.WriteLine(@class.Name);
             GetInterface(@class);
             return true;
         }

tests/Native/Passes.h

@@ -105,3 +105,9 @@ protected:
         int Protected;
     };
 };
+
+class TestExtractInterfacePass
+{
+public:
+    void DoSomething();
+};