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use std::error::Error;
use std::fs::File;
use std::io::{BufReader, BufWriter};
use geojson::FeatureCollection;
fn main() -> Result<(), Box<dyn Error>> {
let file_reader = BufReader::new(File::open("tests/fixtures/countries.geojson")?);
let countries: FeatureCollection = serde_json::from_reader(file_reader)?;
assert_eq!(countries.features.len(), 180);
// Write the structs back to GeoJSON
let file_writer = BufWriter::new(File::create("example-output-countries.geojson")?);
serde_json::to_writer(file_writer, &countries)?;
Ok(())
}
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