test

go.mod

@@ -5,4 +5,5 @@ go 1.16
 require (
 	github.com/spf13/cobra v1.2.1
 	github.com/spf13/viper v1.8.1
+	github.com/stretchr/testify v1.7.0
 )

pkg/middle/test/Hello.go

@@ -0,0 +1,5 @@
+package test
+
+func Hello(str string) (bool, error) {
+	return str == "Nice", nil
+}

pkg/middle/test/Hello_test.go

@@ -0,0 +1,11 @@
+package test
+
+import (
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestHello(t *testing.T) {
+	_, err := Hello("Nice")
+	require.NoError(t, err)
+}