Added BlobProviderSelector_Tests.

framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/BlobProviderSelectorExtensions.cs

@@ -5,7 +5,7 @@ namespace Volo.Abp.BlobStoring
     public static class BlobProviderSelectorExtensions
     {
         public static IBlobProvider Get<TContainer>(
-            [NotNull] IBlobProviderSelector selector)
+            [NotNull] this IBlobProviderSelector selector)
         {
             Check.NotNull(selector, nameof(selector));
 

framework/test/Volo.Abp.BlobStoring.Tests/Volo/Abp/BlobStoring/BlobProviderSelector_Tests.cs

@@ -0,0 +1,31 @@
+using Shouldly;
+using Volo.Abp.BlobStoring.Fakes;
+using Volo.Abp.BlobStoring.TestObjects;
+using Volo.Abp.DynamicProxy;
+using Xunit;
+
+namespace Volo.Abp.BlobStoring
+{
+    public class BlobProviderSelector_Tests : AbpBlobStoringTestBase
+    {
+        private readonly IBlobProviderSelector _selector;
+        
+        public BlobProviderSelector_Tests()
+        {
+            _selector = GetRequiredService<IBlobProviderSelector>();
+        }
+
+        [Fact]
+        public void Should_Select_Default_Provider_If_Not_Configured()
+        {
+            _selector.Get<TestContainer3>().ShouldBeAssignableTo<FakeBlobProvider1>();
+        }
+        
+        [Fact]
+        public void Should_Select_Configured_Provider()
+        {
+            _selector.Get<TestContainer1>().ShouldBeAssignableTo<FakeBlobProvider1>();
+            _selector.Get<TestContainer2>().ShouldBeAssignableTo<FakeBlobProvider2>();
+        }
+    }
+}