Simplify test assertions

Author: bkoelman

test/JsonApiDotNetCoreMongoDbTests/IntegrationTests/QueryStrings/SparseFieldSets/SparseFieldSetTests.cs

@@ -85,7 +85,7 @@ await _testContext.RunOnDatabaseAsync(async dbContext =>
         responseDocument.Data.ManyValue[0].Attributes.ShouldContainKey("caption").With(value => value.Should().Be(post.Caption));
         responseDocument.Data.ManyValue[0].Relationships.Should().BeNull();
 
-        var postCaptured = (BlogPost)store.Resources.Should().ContainSingle(resource => resource is BlogPost).And.Subject.Single();
+        var postCaptured = (BlogPost)store.Resources.Should().ContainSingle(resource => resource is BlogPost).Which;
         postCaptured.Caption.Should().Be(post.Caption);
         postCaptured.Url.Should().BeNull();
     }
@@ -140,7 +140,7 @@ await _testContext.RunOnDatabaseAsync(dbContext =>
         responseDocument.Data.SingleValue.Attributes.ShouldContainKey("url").With(value => value.Should().Be(post.Url));
         responseDocument.Data.SingleValue.Relationships.Should().BeNull();
 
-        var postCaptured = (BlogPost)store.Resources.Should().ContainSingle(resource => resource is BlogPost).And.Subject.Single();
+        var postCaptured = (BlogPost)store.Resources.Should().ContainSingle(resource => resource is BlogPost).Which;
         postCaptured.Url.Should().Be(post.Url);
         postCaptured.Caption.Should().BeNull();
     }
@@ -262,7 +262,7 @@ await _testContext.RunOnDatabaseAsync(async dbContext =>
         responseDocument.Data.ManyValue[0].Attributes.ShouldContainKey("caption").With(value => value.Should().Be(post.Caption));
         responseDocument.Data.ManyValue[0].Relationships.Should().BeNull();
 
-        var postCaptured = (BlogPost)store.Resources.Should().ContainSingle(resource => resource is BlogPost).And.Subject.Single();
+        var postCaptured = (BlogPost)store.Resources.Should().ContainSingle(resource => resource is BlogPost).Which;
         postCaptured.Id.Should().Be(post.Id);
         postCaptured.Caption.Should().Be(post.Caption);
         postCaptured.Url.Should().BeNull();
@@ -297,7 +297,7 @@ await _testContext.RunOnDatabaseAsync(async dbContext =>
         responseDocument.Data.ManyValue[0].Attributes.Should().BeNull();
         responseDocument.Data.ManyValue[0].Relationships.Should().BeNull();
 
-        var postCaptured = (BlogPost)store.Resources.Should().ContainSingle(resource => resource is BlogPost).And.Subject.Single();
+        var postCaptured = (BlogPost)store.Resources.Should().ContainSingle(resource => resource is BlogPost).Which;
         postCaptured.Id.Should().Be(post.Id);
         postCaptured.Url.Should().BeNull();
     }
@@ -332,7 +332,7 @@ await _testContext.RunOnDatabaseAsync(dbContext =>
         responseDocument.Data.SingleValue.Attributes.ShouldContainKey("showAdvertisements").With(value => value.Should().Be(blog.ShowAdvertisements));
         responseDocument.Data.SingleValue.Relationships.Should().BeNull();
 
-        var blogCaptured = (Blog)store.Resources.Should().ContainSingle(resource => resource is Blog).And.Subject.Single();
+        var blogCaptured = (Blog)store.Resources.Should().ContainSingle(resource => resource is Blog).Which;
         blogCaptured.ShowAdvertisements.Should().Be(blog.ShowAdvertisements);
         blogCaptured.IsPublished.Should().Be(blog.IsPublished);
         blogCaptured.Title.Should().Be(blog.Title);