- Added: Example test for simple promise

loop/doc_test.go

@@ -1,9 +1,9 @@
 package loop_test
 
 import (
+	"fmt"
 	"github.com/donutloop/toolkit/loop"
 	"time"
-	"fmt"
 )
 
 func ExampleLoop() {

promise/doc_test.go

@@ -0,0 +1,23 @@
+package promise_test
+
+import (
+	"context"
+	"fmt"
+	"github.com/donutloop/toolkit/promise"
+)
+
+func ExamplePromise() {
+
+	done, errc := promise.Do(context.Background(), func(ctx context.Context) error {
+		fmt.Println("do things")
+		return nil
+	})
+
+	select {
+	case <-done:
+	case err := <-errc:
+		fmt.Println(fmt.Sprintf("error: %v", err))
+	}
+
+	// Output: do things
+}