doc: add examples

xload/type/example_test.go

@@ -0,0 +1,47 @@
+package xloadtype_test
+
+import (
+	"context"
+	"fmt"
+	"github.com/gojekfarm/xtools/xload"
+	xloadtype "github.com/gojekfarm/xtools/xload/type"
+)
+
+var testValues = map[string]string{
+	"LISTENER": "[::1]:8080",
+	"ENDPOINT": "example.com:80",
+}
+
+var loader = xload.LoaderFunc(func(ctx context.Context, key string) (string, error) {
+	return testValues[key], nil
+})
+
+func ExampleEndpoint() {
+	type Server struct {
+		Endpoint xloadtype.Endpoint `env:"ENDPOINT"`
+	}
+
+	var srv Server
+	if err := xload.Load(context.Background(), &srv, loader); err != nil {
+		panic(err)
+	}
+
+	fmt.Println(srv.Endpoint.String())
+
+	// Output: example.com:80
+}
+
+func ExampleListener() {
+	type Server struct {
+		Listener xloadtype.Listener `env:"LISTENER"`
+	}
+
+	var srv Server
+	if err := xload.Load(context.Background(), &srv, loader); err != nil {
+		panic(err)
+	}
+
+	fmt.Println(srv.Listener.String())
+
+	// Output: [::1]:8080
+}