Go doc examples (#23)

Author: stefanb

osmshortlink.go

@@ -61,6 +61,7 @@ func interleaveBits(x uint32, y uint32) uint64 {
 	return c
 }
 
+// Decode a short string into a location and zoom.
 func Decode(s string) (float64, float64, int, error) {
 	if len(s) < 1 {
 		return 0, 0, 0, fmt.Errorf("invalid osm short link string %q", s)

osmshortlink_test.go

@@ -1,6 +1,7 @@
 package osmshortlink
 
 import (
+	"fmt"
 	"math"
 	"testing"
 )
@@ -199,3 +200,30 @@ func TestDecodeShortLinkString(t *testing.T) {
 		})
 	}
 }
+
+func ExampleCreate() {
+	shortLink, err := Create(46.05141, 14.50604, 17)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(shortLink)
+	// Output: https://osm.org/go/0Ik3VNr_A-?m
+}
+
+func ExampleEncode() {
+	shortLink, err := Encode(46.05141, 14.50604, 17)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(shortLink)
+	// Output: 0Ik3VNr_A-
+}
+
+func ExampleDecode() {
+	latitude, longitude, zoom, err := Decode("0Ik3VNr_A-")
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(latitude, longitude, zoom)
+	// Output: 46.05140447616577 14.506051540374756 17
+}