feat: support creating and calling custom functions with go plugin

runner_test.go

@@ -1,9 +1,66 @@
 package hrp
 
 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", "-buildmode=plugin", "-o=examples/debugtalk.so", "examples/plugin/debugtalk.go")
+	if err := cmd.Run(); err != nil {
+		panic(err)
+	}
+	os.Exit(m.Run())
+}
+
+func TestLocatePlugin(t *testing.T) {
+	cwd, _ := os.Getwd()
+	_, err := locatePlugin(cwd)
+	if !assert.Error(t, err) {
+		t.Fail()
+	}
+
+	_, err = locatePlugin("")
+	if !assert.Error(t, err) {
+		t.Fail()
+	}
+
+	startPath := "examples/debugtalk.so"
+	_, err = locatePlugin(startPath)
+	if !assert.Nil(t, err) {
+		t.Fail()
+	}
+
+	startPath = "examples/demo.json"
+	_, err = locatePlugin(startPath)
+	if !assert.Nil(t, err) {
+		t.Fail()
+	}
+
+	startPath = "examples/"
+	_, err = locatePlugin(startPath)
+	if !assert.Nil(t, err) {
+		t.Fail()
+	}
+
+	startPath = "examples/plugin/debugtalk.go"
+	_, err = locatePlugin(startPath)
+	if !assert.Nil(t, err) {
+		t.Fail()
+	}
+
+	startPath = "/abc"
+	_, err = locatePlugin(startPath)
+	if !assert.Error(t, err) {
+		t.Fail()
+	}
+}
+
 func TestHttpRunner(t *testing.T) {
 	testcase1 := &TestCase{
 		Config: NewConfig("TestCase1").