Add unit tests for AutoSampler functionality

.github/workflows/tunny_ci.yml

@@ -73,7 +73,7 @@ jobs:
       - name: Install dependencies
         run: |
           dotnet restore
-          pip install optuna find-libpython
+          pip install find-libpython optuna optunahub cmaes scipy torch
 
       - name: Set Python DLL path and PYTHONHOME
         run: |

Optuna/Optuna.csproj

@@ -47,9 +47,9 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="pythonnet" Version="3.0.5" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Microsoft.Data.Sqlite.Core" Version="9.0.0" />
+    <PackageReference Include="pythonnet" Version="3.1.0-preview2024-09-06" />
     <PackageReference Include="Stub.System.Data.SQLite.Core.NetFramework" Version="1.0.119" />
     <PackageReference Include="System.Drawing.Common" Version="7.0.0" />
   </ItemGroup>

OptunaTests/Sampler/OptunaHub/AutoSamplerTests.cs

@@ -0,0 +1,35 @@
+using Optuna.Util;
+
+using Python.Runtime;
+
+using Xunit;
+
+namespace Optuna.Sampler.OptunaHub.Tests
+{
+    public class AutoSamplerTests
+    {
+        [Fact]
+        public void ConstructorTest()
+        {
+            var sampler = new AutoSampler();
+            Assert.Equal(ObjectiveNumberSupport.Any, sampler.ObjectiveNumberSupport);
+            Assert.False(sampler.ForceReload);
+        }
+
+        [Fact]
+        public void ToPythonTest()
+        {
+            PythonEngine.Initialize();
+            PythonEngine.BeginAllowThreads();
+            using(Py.GIL())
+            {
+                var sampler = new AutoSampler();
+                dynamic pyObj = sampler.ToPython(false);
+                Assert.Equal("AutoSampler", pyObj.ToString());
+                dynamic pyObj2 = sampler.ToPython(true);
+                Assert.Equal("AutoSampler", pyObj2.ToString());
+            }
+            PythonEngine.Shutdown();
+        }
+    }
+}

OptunaTests/Study/StudyWrapperTests.cs

@@ -1,30 +1,24 @@
 using System;
 
-using OptunaTests;
-
 using Python.Runtime;
 
 using Xunit;
 
 namespace Optuna.Study.Tests
 {
-    public class StudyWrapperTests : IClassFixture<TestFixture>
+    public class StudyWrapperTests
     {
-        private readonly TestFixture _fixture;
-
-        public StudyWrapperTests(TestFixture fixture)
-        {
-            _fixture = fixture;
-        }
-
         [Fact]
         public void ConstructorArgTypeTest()
         {
+            PythonEngine.Initialize();
+            PythonEngine.BeginAllowThreads();
             using (Py.GIL())
             {
                 var pyInt = new PyInt(1);
                 Assert.Throws<ArgumentException>(() => new StudyWrapper(pyInt));
             }
+            PythonEngine.Shutdown();
         }
     }
 }