public async Task TestUSCountiesFromWeb()
{
var client = new HttpClient();
using var rspns = await client.GetAsync("https://flatgeobuf.org/test/data/UScounties.fgb");
if (rspns == null || !rspns.IsSuccessStatusCode)
{
Assert.Inconclusive("Failed to get USCounties.fgb");
}
var strm = await rspns.Content.ReadAsStreamAsync();
if (strm == null)
{
Assert.Inconclusive("Failed to get USCounties.fgb");
}
var ae = await AsyncFeatureEnumerator.Create(strm);
Assert.IsNotNull(ae);
int numFeaturesRead = 0;
while (await ae.MoveNextAsync())
{
Console.WriteLine($" {ae.Current.Attributes["FIPS"]} - {ae.Current.Attributes["NAME"]} ({ae.Current.Attributes["STATE"]})");
numFeaturesRead++;
}
Assert.AreEqual(ae.NumFeatures, numFeaturesRead);
}
public async Task TestCountriesUnseekable()
{
var ae = await AsyncFeatureEnumerator.Create(new UnseekableStream(File.OpenRead("../../../../../../test/data/countries.fgb")));
Assert.IsNotNull(ae);
Console.WriteLine(ae.Extent.ToString());
int numFeaturesExpected = ae.NumFeatures;
int numFeaturesRead = 0;
while (await ae.MoveNextAsync())
{
Console.WriteLine($" {ae.Current.Attributes["id"]} - {ae.Current.Attributes["name"]}");
numFeaturesRead++;
}
Assert.AreEqual(numFeaturesExpected, numFeaturesRead);
}
public async Task TestCountriesUnseekableWithFilter()
{
var rect = new Envelope(-16.1, 32.88, 40.18, 84.17);
var ae = await AsyncFeatureEnumerator.Create(new UnseekableStream(File.OpenRead("../../../../../../test/data/countries.fgb")), rect : rect);
Assert.IsNotNull(ae);
Console.WriteLine(ae.Extent.ToString());
int numFeaturesExpected = ae.NumFeatures;
int numFeaturesRead = 0;
while (await ae.MoveNextAsync())
{
Console.WriteLine($" {ae.Current.Attributes["id"]} - {ae.Current.Attributes["name"]}");
numFeaturesRead++;
Assert.IsTrue(rect.Intersects(ae.Current.Geometry.EnvelopeInternal));
}
Assert.IsTrue(numFeaturesExpected > numFeaturesRead);
}
