public void IfChangeDoesNotContainMarketDefinitionAnyPreviousMarketDefinitionShouldNotBeCleared()
{
var mc1 = new MarketChangeStub().WithMarketDefinition(new MarketDefinition {
Venue = "Test Venue"
});
var c1 = new ChangeMessageStub().WithMarketChange(mc1).Build();
_market.OnChange(c1);
var mc = new MarketChange {
MarketId = "1.2345"
};
var c2 = _change.WithMarketChange(mc).Build();
_market.OnChange(c2);
Assert.Equal("Test Venue", _market.MarketDefinition.Venue);
}