static void TestApi()
{
{
using var db = new ZipCodeDatabase();
db.Populate();
}
{
using var db = new ZipCodeDatabase();
db.Populate();
var result = db.PopulationOf("00000");
Debug.Assert(0 == result);
result = db.PopulationOf("90210");
Debug.Assert(90210 == result);
result = db.PopulationOf("20500");
Debug.Assert(20500 == result);
result = db.PopulationOf("99999");
Debug.Assert(99999 == result);
result = db.PopulationOf("non-existing-zip-code");
Debug.Assert(0 == result);
}
}
static void Main(string[] args)
{
using var db = new ZipCodeDatabase();
db.Populate();
var pop1 = db.PopulationOf("90210");
var pop2 = db.PopulationOf("20500");
Console.WriteLine($"pop1: {pop1}, pop2: {pop2}");
TestApi();
}