ManagedClientConnection conn = getConnection(mgr, route);
conn.open(route, httpContext, defaultParams);
Assert.assertEquals("connectionsInPool", 1, mgr.getConnectionsInPool());
Assert.assertEquals("connectionsInPool(host)", 1, mgr.getConnectionsInPool(route));
mgr.releaseConnection(conn, 100, TimeUnit.MILLISECONDS);
// Released, still active.
Assert.assertEquals("connectionsInPool", 1, mgr.getConnectionsInPool());
Assert.assertEquals("connectionsInPool(host)", 1, mgr.getConnectionsInPool(route));