public void GetOverviewTest_MapParameterISNull()
{
Map map = new Map("http://" + ip + ":8090/iserver/services/map-world/rest");
string mapName = "世界地图";
ImageOutputOption option = new ImageOutputOption();
option.ImageOutputFormat = ImageOutputFormat.PNG;
option.ImageReturnType = ImageReturnType.URL;
Overview image = map.GetOverview(mapName, null, option);
Assert.IsNotNull(image.ImageUrl);
Assert.IsNull(image.ImageData);
Assert.AreEqual(image.Viewer.Height, 256);
Assert.AreEqual(image.Viewer.Width, 256);
Assert.IsNotNull(image.LastModified);
Assert.IsNotNull(image.ViewBounds);
Assert.AreEqual(image.ViewBounds.LeftBottom.X, 84.30460372171433);
Assert.AreEqual(image.ViewBounds.LeftBottom.Y, 15.704362017314319);
Assert.AreEqual(image.MapName, mapName);
}