feat: support creating and calling custom functions with hashicorp/go-plugin

plugin-gosdk/host_test.go

@@ -0,0 +1,42 @@
+package plugin
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMain(m *testing.M) {
+	fmt.Println("[TestMain] build go plugin")
+	cmd := exec.Command("go", "build", "-o=debugtalk", "plugin/debugtalk.go")
+	if err := cmd.Run(); err != nil {
+		panic(err)
+	}
+	os.Exit(m.Run())
+}
+
+func TestInitHashicorpPlugin(t *testing.T) {
+	f, err := Init("./debugtalk")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer Quit()
+
+	v, err := f.Call("sum_int", 1, 2, 3, 4)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !assert.Equal(t, 10, v) {
+		t.Fail()
+	}
+	v, err = f.Call("concatenate_string", "a", "b", "c")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !assert.Equal(t, "abc", v) {
+		t.Fail()
+	}
+}