try

.drone.yml

@@ -1,9 +1,10 @@
-# .drone.yml
-kind: pipeline
-name: default
+workspace:
+  base: /go
+  path: src/gogs.kikakika.com/lihongfeng/first
 
-steps:
-- name: run
-  image: golang
+pipeline:
+  build:
+    image: golang:1.10.2
     commands:
+      - go test
       - go build 

main.go

@@ -5,5 +5,9 @@ import (
 )
 
 func main() {
-	fmt.Println("hello world")
+	fmt.Printf("hello world")
+}
+
+func hello() string {
+	return "hello world"
 }

main_test.go

@@ -0,0 +1,9 @@
+package main
+
+import "testing"
+
+func TestHello(t *testing.T) {
+	if hello() != "hello world" {
+		t.Error("Testing error")
+	}
+}