Updated NUnit to the latest version (3.6) to fix a test failing at AppVeyor.

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

build/InstallNugets.sh

@@ -1,5 +1,5 @@
 wget https://nuget.org/nuget.exe
 BUILD_DIR=$(dirname -- $0)
-mono nuget.exe install NUnit -Version 2.6.4 -OutputDirectory $BUILD_DIR/../deps
-mono nuget.exe install NUnit.Runners -Version 2.6.4 -OutputDirectory $BUILD_DIR/../deps
-cp $BUILD_DIR/../deps/NUnit.2.6.4/lib/nunit.framework.* $BUILD_DIR/../deps/NUnit
+mono nuget.exe install NUnit -Version 3.6.0 -OutputDirectory $BUILD_DIR/../deps
+mono nuget.exe install NUnit.Runners -Version 3.6.0 -OutputDirectory $BUILD_DIR/../deps
+cp $BUILD_DIR/../deps/NUnit.3.6.0/lib/nunit.framework.* $BUILD_DIR/../deps/NUnit

src/Generator.Tests/GeneratorTest.cs

@@ -68,7 +68,8 @@ namespace CppSharp.Utils
         #region Helpers
         public static string GetTestsDirectory(string name)
         {
-            var directory = Directory.GetParent(Directory.GetCurrentDirectory());
+            var directory = new DirectoryInfo(
+                Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
 
             while (directory != null)
             {

tests/CSharp/CSharp.Tests.cs

@@ -550,8 +550,7 @@ public unsafe class CSharpTests : GeneratorTestFixture
         //Assert.That(CSharp.HasFreeConstant.AnotherUnit.STD_STRING_CONSTANT, Is.EqualTo("test"));
     }
 
-    // HACK: the completion of types is temporarily suspended because of problems with QtWidgets
-    [Test, Ignore]
+    [Test, Ignore("The completion of types is temporarily suspended because of problems with QtWidgets.")]
     public void TestTemplateInternals()
     {
         foreach (var internalType in new[]

tests/Common/Common.Tests.cs

@@ -283,13 +283,20 @@ public class CommonTests : GeneratorTestFixture
     public void TestConversionOperator()
     {
         var bar = new Bar2 { A = 1, B = 2, C = 3 };
-        Foo2 foo = bar;
-        Assert.AreEqual(foo.A, 1);
-        Assert.AreEqual(foo.B, 2);
-        Assert.AreEqual(foo.C, 3);
+        using (Foo2 foo = bar)
+        {
+            Assert.That(1, Is.EqualTo(foo.A));
+            Assert.That(2, Is.EqualTo(foo.B));
+            Assert.That(3, Is.EqualTo(foo.C));
+        }
+        using (var bar2Nested = new Bar2.Nested())
+        {
+            int bar2NestedInt = bar2Nested;
+            Assert.That(bar2NestedInt, Is.EqualTo(300));
+        }
 
-        Assert.AreEqual(300, new Bar2.Nested());
-        Assert.AreEqual(500, new Bar2());
+        int bar2Int = new Bar2();
+        Assert.That(bar2Int, Is.EqualTo(500));
     }
 
     [Test]
@@ -387,10 +394,18 @@ public class CommonTests : GeneratorTestFixture
     [Test]
     public void TestOperators()
     {
-        var @class = new ClassWithOverloadedOperators();
-        Assert.AreEqual(1, (char) @class);
-        Assert.AreEqual(2, @class);
-        Assert.AreEqual(3, (short) @class);
+        using (var @class = new ClassWithOverloadedOperators())
+        {
+            char @char = @class;
+            Assert.That(@char, Is.EqualTo(1));
+            short @short = @class;
+            Assert.That(@short, Is.EqualTo(3));
+        }
+        using (var @class = new ClassWithOverloadedOperators())
+        {
+            int classInt = @class;
+            Assert.That(classInt, Is.EqualTo(2));
+        }
     }
 
     [Test]
@@ -493,8 +508,7 @@ public class CommonTests : GeneratorTestFixture
         new TestDelegates().MarshalUnattributedDelegate(i => i);
     }
 
-    // TODO: this test crashes our Windows build, possibly a problem with the NUnit runner there
-    [Test, Platform(Exclude = "Win")]
+    [Test, Platform(Exclude = "Win", Reason = "This test crashes our Windows build, possibly a problem with the NUnit runner there.")]
     public void TestPassAnonymousDelegate()
     {
         var testDelegates = new TestDelegates();