Refactoring codes for more tg message types

query/geo_test.go

@@ -0,0 +1,33 @@
+package query
+
+import (
+	"fmt"
+	"testing"
+)
+
+type City struct {
+	Name string
+	NoWords
+	GeoLocation
+}
+
+func TestGeo(t *testing.T) {
+
+	B := GeoLocations{
+		City{Name: "Osaka", GeoLocation: GeoLocation{34.6937, 135.5023}},
+		City{Name: "Nagoya", GeoLocation: GeoLocation{35.1815, 136.9066}},
+		City{Name: "Sapporo", GeoLocation: GeoLocation{43.0618, 141.3545}},
+		City{Name: "Yokohama", GeoLocation: GeoLocation{35.4437, 139.6380}},
+	}
+
+	// Reference point A (Tokyo)
+	A := GeoLocation{35.6895, 139.6917}
+
+	// Sort by distance
+	B.SortByNearest(A)
+
+	// Print result
+	for _, loc := range B {
+		fmt.Printf("%s: %.2f km\n", loc.(City).Name, loc.Dist(A.Lat(), A.Lon())/1000)
+	}
+}