Prevent substitute garbage collection

Author: fredericDelaporte

src/NHibernate.Test/Linq/ByMethod/WithOptionsTests.cs

@@ -41,6 +41,10 @@ public void AppliesOptionsToQuery()
 			query.Received(1).SetCacheMode(CacheMode.Normal);
 			query.Received(1).SetCacheRegion("testregion");
 			query.Received(1).SetTimeout(10);
+
+			// Prevent garbage collection of session substitute before end of test, since the Linq query provider
+			// only has a weak reference on it.
+			Assert.That(session, Is.Not.Null);
 		}
 
 		[Test]
@@ -72,6 +76,10 @@ public void DoNotContaminateQueryWithOptions()
 			query.Received(1).SetCacheMode(CacheMode.Normal);
 			query.Received(1).SetCacheRegion("testregion");
 			query.Received(1).SetTimeout(10);
+
+			// Prevent garbage collection of session substitute before end of test, since the Linq query provider
+			// only has a weak reference on it.
+			Assert.That(session, Is.Not.Null);
 		}
 
 		[Test]
@@ -101,6 +109,10 @@ public async Task AppliesOptionsToQueryAsync()
 			query.Received(1).SetCacheMode(CacheMode.Normal);
 			query.Received(1).SetCacheRegion("testregion");
 			query.Received(1).SetTimeout(10);
+
+			// Prevent garbage collection of session substitute before end of test, since the Linq query provider
+			// only has a weak reference on it.
+			Assert.That(session, Is.Not.Null);
 		}
 
 		[Test]
@@ -133,6 +145,10 @@ public async Task DoNotContaminateQueryWithOptionsAsync()
 			query.Received(1).SetCacheMode(CacheMode.Normal);
 			query.Received(1).SetCacheRegion("testregion");
 			query.Received(1).SetTimeout(10);
+
+			// Prevent garbage collection of session substitute before end of test, since the Linq query provider
+			// only has a weak reference on it.
+			Assert.That(session, Is.Not.Null);
 		}
 	}
 }