Enable nullable annotations for Volo.Abp.TestBase

framework/src/Volo.Abp.TestBase/Volo.Abp.TestBase.csproj

@@ -5,6 +5,8 @@
 
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;netstandard2.1;net7.0</TargetFrameworks>
+    <Nullable>enable</Nullable>
+    <WarningsAsErrors>Nullable</WarningsAsErrors>
     <AssemblyName>Volo.Abp.TestBase</AssemblyName>
     <PackageId>Volo.Abp.TestBase</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>

framework/src/Volo.Abp.TestBase/Volo/Abp/AbpTestBaseWithServiceProvider.cs

@@ -5,14 +5,14 @@ namespace Volo.Abp;
 
 public abstract class AbpTestBaseWithServiceProvider
 {
-    protected IServiceProvider ServiceProvider { get; set; }
+    protected IServiceProvider ServiceProvider { get; set; } = default!;
 
-    protected virtual T GetService<T>()
+    protected virtual T? GetService<T>()
     {
         return ServiceProvider.GetService<T>();
     }
-
-    protected virtual T GetRequiredService<T>()
+ 
+    protected virtual T GetRequiredService<T>() where T : notnull
     {
         return ServiceProvider.GetRequiredService<T>();
     }

framework/src/Volo.Abp.TestBase/Volo/Abp/Testing/AbpAsyncIntegratedTest.cs

@@ -8,11 +8,11 @@ namespace Volo.Abp.Testing;
 public class AbpAsyncIntegratedTest<TStartupModule> : AbpTestBaseWithServiceProvider
     where TStartupModule : IAbpModule
 {
-    protected IAbpApplication Application { get; set; }
+    protected IAbpApplication Application { get; set; } = default!;
 
-    protected IServiceProvider RootServiceProvider { get; set; }
+    protected IServiceProvider RootServiceProvider { get; set; } = default!;
 
-    protected IServiceScope TestServiceScope { get; set; }
+    protected IServiceScope TestServiceScope { get; set; } = default!;
 
     public virtual async Task InitializeAsync()
     {