fix test

Author: KirillKurdyukov

src/Ydb.Sdk/test/Ydb.Sdk.Ado.Tests/TestBase.cs

@@ -20,9 +20,18 @@ protected static YdbConnection CreateOpenConnection()
 
     protected static async Task<YdbConnection> CreateOpenConnectionAsync()
     {
-        var connection = CreateConnection();
-        await connection.OpenAsync();
-        return connection;
+        try
+        {
+            var connection = CreateConnection();
+            await connection.OpenAsync();
+            return connection;
+        }
+        catch (YdbException e) when (e is { Code: StatusCode.Unspecified, Message: "Session Source is disposed." })
+        {
+            var connection = CreateConnection();
+            await connection.OpenAsync();
+            return connection;
+        }
     }
 
     public async Task InitializeAsync() => await OnInitializeAsync().ConfigureAwait(false);

src/Ydb.Sdk/test/Ydb.Sdk.Ado.Tests/YdbConnectionTests.cs

@@ -211,7 +211,7 @@ public async Task DisableDiscovery_WhenPropertyIsTrue_SimpleWorking()
     public async Task OpenAsync_WhenCancelTokenIsCanceled_ThrowYdbException()
     {
         await using var connection = CreateConnection();
-        connection.ConnectionString = ConnectionString;
+        connection.ConnectionString = ConnectionString + ";MinSessionPool=1";
         using var cts = new CancellationTokenSource();
         cts.Cancel();
         Assert.Equal("The connection pool has been exhausted, either raise 'MaxSessionPool' (currently 10) " +