diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 6a1558e2..ece0b0fb 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -1,6 +1,7 @@
 name: Run unittests
 
 on:
+  push:
   pull_request:
     types: [synchronize]
   schedule:
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index dfeec493..ebe15942 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Release History
 
-## v0.5.2 (2022-01-14)
+## v0.5.2 (2022-01-16)
 
 - feat: support creating and calling custom functions with [hashicorp/go-plugin](https://github.com/hashicorp/go-plugin)
 
diff --git a/docs/cmd/hrp.md b/docs/cmd/hrp.md
index 8ccee28e..14de4bca 100644
--- a/docs/cmd/hrp.md
+++ b/docs/cmd/hrp.md
@@ -33,4 +33,4 @@ Copyright 2021 debugtalk
 * [hrp run](hrp_run.md)	 - run API test
 * [hrp startproject](hrp_startproject.md)	 - create a scaffold project
 
-###### Auto generated by spf13/cobra on 13-Jan-2022
+###### Auto generated by spf13/cobra on 17-Jan-2022
diff --git a/docs/cmd/hrp_boom.md b/docs/cmd/hrp_boom.md
index 1d0a6263..9b274446 100644
--- a/docs/cmd/hrp_boom.md
+++ b/docs/cmd/hrp_boom.md
@@ -39,4 +39,4 @@ hrp boom [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 13-Jan-2022
+###### Auto generated by spf13/cobra on 17-Jan-2022
diff --git a/docs/cmd/hrp_har2case.md b/docs/cmd/hrp_har2case.md
index 6f57a509..2fe2e4ae 100644
--- a/docs/cmd/hrp_har2case.md
+++ b/docs/cmd/hrp_har2case.md
@@ -23,4 +23,4 @@ hrp har2case $har_path... [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 13-Jan-2022
+###### Auto generated by spf13/cobra on 17-Jan-2022
diff --git a/docs/cmd/hrp_run.md b/docs/cmd/hrp_run.md
index 9cce4aaf..2abd2c76 100644
--- a/docs/cmd/hrp_run.md
+++ b/docs/cmd/hrp_run.md
@@ -31,4 +31,4 @@ hrp run $path... [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 13-Jan-2022
+###### Auto generated by spf13/cobra on 17-Jan-2022
diff --git a/docs/cmd/hrp_startproject.md b/docs/cmd/hrp_startproject.md
index 736d31d6..40b7807b 100644
--- a/docs/cmd/hrp_startproject.md
+++ b/docs/cmd/hrp_startproject.md
@@ -16,4 +16,4 @@ hrp startproject $project_name [flags]
 
 * [hrp](hrp.md)	 - One-stop solution for HTTP(S) testing.
 
-###### Auto generated by spf13/cobra on 13-Jan-2022
+###### Auto generated by spf13/cobra on 17-Jan-2022
diff --git a/examples/plugin/debugtalk.go b/examples/plugin/debugtalk.go
index dbe3bf7a..ff8d115f 100644
--- a/examples/plugin/debugtalk.go
+++ b/examples/plugin/debugtalk.go
@@ -9,26 +9,49 @@ func init() {
 	log.Println("plugin init function called")
 }
 
-func SumInt(args ...interface{}) (interface{}, error) {
+func SumTwoInt(a, b int) int {
+	return a + b
+}
+
+func SumInts(args ...int) int {
 	var sum int
 	for _, arg := range args {
-		v, ok := arg.(int)
-		if !ok {
+		sum += arg
+	}
+	return sum
+}
+
+func Sum(args ...interface{}) (interface{}, error) {
+	var sum float64
+	for _, arg := range args {
+		switch v := arg.(type) {
+		case int:
+			sum += float64(v)
+		case float64:
+			sum += v
+		default:
 			return nil, fmt.Errorf("unexpected type: %T", arg)
 		}
-		sum += v
 	}
 	return sum, nil
 }
 
-func ConcatenateString(args ...interface{}) (interface{}, error) {
+func SumTwoString(a, b string) string {
+	return a + b
+}
+
+func SumStrings(s ...string) string {
+	var sum string
+	for _, arg := range s {
+		sum += arg
+	}
+	return sum
+}
+
+func Concatenate(args ...interface{}) (interface{}, error) {
 	var result string
 	for _, arg := range args {
-		v, ok := arg.(string)
-		if !ok {
-			return nil, fmt.Errorf("unexpected type: %T", arg)
-		}
-		result += v
+		result += fmt.Sprintf("%v", arg)
 	}
 	return result, nil
 }
diff --git a/examples/plugin/hashicorp.go b/examples/plugin/hashicorp.go
new file mode 100644
index 00000000..8bae45a3
--- /dev/null
+++ b/examples/plugin/hashicorp.go
@@ -0,0 +1,14 @@
+package main
+
+import "github.com/httprunner/hrp/plugin"
+
+// register functions and build to plugin binary
+func main() {
+	plugin.Register("sum_ints", SumInts)
+	plugin.Register("sum_two_int", SumTwoInt)
+	plugin.Register("sum", Sum)
+	plugin.Register("sum_two_string", SumTwoString)
+	plugin.Register("sum_strings", SumStrings)
+	plugin.Register("concatenate", Concatenate)
+	plugin.Serve()
+}
diff --git a/go.mod b/go.mod
index ba72d455..e0e88167 100644
--- a/go.mod
+++ b/go.mod
@@ -15,7 +15,7 @@ require (
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.11.0
-	github.com/rs/zerolog v1.26.0
+	github.com/rs/zerolog v1.26.1
 	github.com/spf13/cobra v1.2.1
 	github.com/stretchr/testify v1.7.0
 	golang.org/x/sys v0.0.0-20211124211545-fe61309f8881 // indirect
diff --git a/go.sum b/go.sum
index cbd318a5..9a93daa1 100644
--- a/go.sum
+++ b/go.sum
@@ -370,8 +370,8 @@ github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJ
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/rs/xid v1.3.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
-github.com/rs/zerolog v1.26.0 h1:ORM4ibhEZeTeQlCojCK2kPz1ogAY4bGs4tD+SaAdGaE=
-github.com/rs/zerolog v1.26.0/go.mod h1:yBiM87lvSqX8h0Ww4sdzNSkVYZ8dL2xjZJG1lAuGZEo=
+github.com/rs/zerolog v1.26.1 h1:/ihwxqH+4z8UxyI70wM1z9yCvkWcfz/a3mj48k/Zngc=
+github.com/rs/zerolog v1.26.1/go.mod h1:/wSSJWX7lVrsOwlbyTRSOJvqRlc+WjWlfes+CiJ+tmc=
 github.com/russross/blackfriday v1.5.2 h1:HyvC0ARfnZBqnXwABFeSZHpKvJHJJfPz81GNueLj0oo=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
 github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
@@ -459,6 +459,7 @@ golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191227163750-53104e6ec876/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20211215165025-cf75a172585e/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
diff --git a/go_plugin_test.go b/go_plugin_test.go
index c0384242..6183c7ea 100644
--- a/go_plugin_test.go
+++ b/go_plugin_test.go
@@ -15,7 +15,8 @@ import (
 func buildGoPlugin() {
 	fmt.Println("[setup] build go plugin")
 	// flag -race is necessary in order to be consistent with go test
-	cmd := exec.Command("go", "build", "-buildmode=plugin", "-race", "-o=examples/debugtalk.so", "examples/plugin/debugtalk.go")
+	cmd := exec.Command("go", "build", "-buildmode=plugin", "-race",
+		"-o=examples/debugtalk.so", "examples/plugin/debugtalk.go")
 	if err := cmd.Run(); err != nil {
 		panic(err)
 	}
@@ -78,10 +79,13 @@ func TestCallPluginFunction(t *testing.T) {
 	defer removeGoPlugin()
 
 	parser := newParser()
-	parser.initPlugin("examples/debugtalk.so")
+	err := parser.initPlugin("examples/debugtalk.so")
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	// call function without arguments
-	result, err := parser.callFunc("ConcatenateString", "1", "2", "3.14")
+	result, err := parser.callFunc("Concatenate", "1", 2, "3.14")
 	if !assert.NoError(t, err) {
 		t.Fail()
 	}
diff --git a/plugin/examples/plugin_test.go b/hashicorp_plugin_test.go
similarity index 73%
rename from plugin/examples/plugin_test.go
rename to hashicorp_plugin_test.go
index 2164ceee..c9edf994 100644
--- a/plugin/examples/plugin_test.go
+++ b/hashicorp_plugin_test.go
@@ -1,4 +1,4 @@
-package main
+package hrp
 
 import (
 	"fmt"
@@ -6,22 +6,30 @@ import (
 	"os/exec"
 	"testing"
 
-	"github.com/stretchr/testify/assert"
-
 	"github.com/httprunner/hrp/plugin/host"
+	"github.com/stretchr/testify/assert"
 )
 
-func TestMain(m *testing.M) {
-	fmt.Println("[TestMain] build go plugin")
-	cmd := exec.Command("go", "build", "-o=debugtalk.bin", "./debugtalk.go")
+func buildHashicorpPlugin() {
+	fmt.Println("[init] build hashicorp go plugin")
+	cmd := exec.Command("go", "build",
+		"-o=examples/debugtalk.bin",
+		"examples/plugin/hashicorp.go", "examples/plugin/debugtalk.go")
 	if err := cmd.Run(); err != nil {
 		panic(err)
 	}
-	os.Exit(m.Run())
+}
+
+func removeHashicorpPlugin() {
+	fmt.Println("[teardown] remove hashicorp plugin")
+	os.Remove("examples/debugtalk.bin")
 }
 
 func TestInitHashicorpPlugin(t *testing.T) {
-	f, err := host.Init("./debugtalk.bin")
+	buildHashicorpPlugin()
+	defer removeHashicorpPlugin()
+
+	f, err := host.Init("examples/debugtalk.bin")
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/plugin/examples/debugtalk.go b/plugin/examples/debugtalk.go
deleted file mode 100644
index d9d52d6d..00000000
--- a/plugin/examples/debugtalk.go
+++ /dev/null
@@ -1,65 +0,0 @@
-package main
-
-import (
-	"fmt"
-
-	plugin "github.com/httprunner/hrp/plugin"
-)
-
-func SumTwoInt(a, b int) int {
-	return a + b
-}
-
-func SumInts(args ...int) int {
-	var sum int
-	for _, arg := range args {
-		sum += arg
-	}
-	return sum
-}
-
-func Sum(args ...interface{}) (interface{}, error) {
-	var sum float64
-	for _, arg := range args {
-		switch v := arg.(type) {
-		case int:
-			sum += float64(v)
-		case float64:
-			sum += v
-		default:
-			return nil, fmt.Errorf("unexpected type: %T", arg)
-		}
-	}
-	return sum, nil
-}
-
-func SumTwoString(a, b string) string {
-	return a + b
-}
-
-func SumStrings(s ...string) string {
-	var sum string
-	for _, arg := range s {
-		sum += arg
-	}
-	return sum
-}
-
-func Concatenate(args ...interface{}) (interface{}, error) {
-	var result string
-	for _, arg := range args {
-		result += fmt.Sprintf("%v", arg)
-	}
-	return result, nil
-}
-
-// register functions and build to plugin binary
-func main() {
-	plugin.Register("sum_ints", SumInts)
-	plugin.Register("sum_two_int", SumTwoInt)
-	plugin.Register("sum", Sum)
-	plugin.Register("sum_two_string", SumTwoString)
-	plugin.Register("sum_strings", SumStrings)
-	plugin.Register("concatenate", Concatenate)
-	plugin.Serve()
-}
diff --git a/plugin/go.mod b/plugin/go.mod
deleted file mode 100644
index f5af4505..00000000
--- a/plugin/go.mod
+++ /dev/null
@@ -1,10 +0,0 @@
-module github.com/httprunner/hrp/plugin
-
-go 1.16
-
-require (
-	github.com/hashicorp/go-hclog v1.1.0
-	github.com/hashicorp/go-plugin v1.4.3
-	github.com/rs/zerolog v1.26.1
-	github.com/stretchr/testify v1.7.0
-)
diff --git a/plugin/go.sum b/plugin/go.sum
deleted file mode 100644
index 0e146002..00000000
--- a/plugin/go.sum
+++ /dev/null
@@ -1,118 +0,0 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
-github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
-github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.4 h1:87PNWwrRvUSnqS4dlcBU/ftvOIBep4sYuBLlh6rX2wk=
-github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
-github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
-github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
-github.com/hashicorp/go-hclog v0.14.1/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
-github.com/hashicorp/go-hclog v1.1.0 h1:QsGcniKx5/LuX2eYoeL+Np3UKYPNaN7YKpTh29h8rbw=
-github.com/hashicorp/go-hclog v1.1.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
-github.com/hashicorp/go-plugin v1.4.3 h1:DXmvivbWD5qdiBts9TpBC7BYL1Aia5sxbRgQB+v6UZM=
-github.com/hashicorp/go-plugin v1.4.3/go.mod h1:5fGEH17QVwTTcR0zV7yhDPLLmFX9YSZ38b18Udy6vYQ=
-github.com/hashicorp/yamux v0.0.0-20180604194846-3520598351bb h1:b5rjCoWHc7eqmAS4/qyk21ZsHyb6Mxv/jykxvNTkU4M=
-github.com/hashicorp/yamux v0.0.0-20180604194846-3520598351bb/go.mod h1:+NfK9FKeTrX5uv1uIXGdwYDTeHna2qgaIlx54MXqjAM=
-github.com/jhump/protoreflect v1.6.0 h1:h5jfMVslIg6l29nsMs0D8Wj17RDVdNYti0vDN/PZZoE=
-github.com/jhump/protoreflect v1.6.0/go.mod h1:eaTn3RZAmMBcV0fifFvlm6VHNz3wSkYyXYWUh7ymB74=
-github.com/mattn/go-colorable v0.1.4 h1:snbPLB8fVfU9iwbbo30TPtbLRzwWu6aJS6Xh4eaaviA=
-github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
-github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
-github.com/mattn/go-isatty v0.0.10 h1:qxFzApOv4WsAL965uUPIsXzAKCZxN2p9UqdhFS4ZW10=
-github.com/mattn/go-isatty v0.0.10/go.mod h1:qgIWMr58cqv1PHHyhnkY9lrL7etaEgOFcMEpPG5Rm84=
-github.com/mitchellh/go-testing-interface v0.0.0-20171004221916-a61a99592b77 h1:7GoSOOW2jpsfkntVKaS2rAr1TJqfcxotyaUcuxoZSzg=
-github.com/mitchellh/go-testing-interface v0.0.0-20171004221916-a61a99592b77/go.mod h1:kRemZodwjscx+RGhAo8eIhFbs2+BFgRtFPeD/KE+zxI=
-github.com/oklog/run v1.0.0 h1:Ru7dDtJNOyC66gQ5dQmaCa0qIsAUFY3sFpK1Xk8igrw=
-github.com/oklog/run v1.0.0/go.mod h1:dlhp/R75TPv97u0XWUtDeV/lRKWPKSdTuV0TZvrmrQA=
-github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
-github.com/rs/xid v1.3.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
-github.com/rs/zerolog v1.26.1 h1:/ihwxqH+4z8UxyI70wM1z9yCvkWcfz/a3mj48k/Zngc=
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diff --git a/plugin/shared/call.go b/plugin/shared/call.go
new file mode 100644
index 00000000..8d30516d
--- /dev/null
+++ b/plugin/shared/call.go
@@ -0,0 +1,103 @@
+package shared
+
+import (
+	"fmt"
+	"reflect"
+
+	"github.com/rs/zerolog/log"
+)
+
+// CallFunc calls function with arguments
+func CallFunc(fn reflect.Value, args ...interface{}) (interface{}, error) {
+	argumentsValue, err := convertArgs(fn, args...)
+	if err != nil {
+		log.Error().Err(err).Msg("convert arguments failed")
+		return nil, err
+	}
+	return call(fn, argumentsValue)
+}
+
+func convertArgs(fn reflect.Value, args ...interface{}) ([]reflect.Value, error) {
+	fnArgsNum := fn.Type().NumIn()
+
+	// function arguments should match exactly if function's last argument is not slice
+	if len(args) != fnArgsNum && (fnArgsNum == 0 || fn.Type().In(fnArgsNum-1).Kind() != reflect.Slice) {
+		return nil, fmt.Errorf("function expect %d arguments, but got %d", fnArgsNum, len(args))
+	}
+
+	argumentsValue := make([]reflect.Value, len(args))
+	for index := 0; index < len(args); index++ {
+		argument := args[index]
+		if argument == nil {
+			argumentsValue[index] = reflect.Zero(fn.Type().In(index))
+			continue
+		}
+
+		argumentValue := reflect.ValueOf(argument)
+		actualArgumentType := reflect.TypeOf(argument)
+
+		var expectArgumentType reflect.Type
+		if (index == fnArgsNum-1 && fn.Type().In(fnArgsNum-1).Kind() == reflect.Slice) || index > fnArgsNum-1 {
+			// last fn argument is slice
+			expectArgumentType = fn.Type().In(fnArgsNum - 1).Elem() // slice element type
+
+			// last argument is also slice, e.g. []int
+			if actualArgumentType.Kind() == reflect.Slice {
+				if actualArgumentType.Elem() != expectArgumentType {
+					err := fmt.Errorf("function argument %d's slice element type is not match, expect %v, actual %v",
+						index, expectArgumentType, actualArgumentType)
+					return nil, err
+				}
+				argumentsValue[index] = argumentValue
+				continue
+			}
+		} else {
+			expectArgumentType = fn.Type().In(index)
+		}
+
+		// type match
+		if expectArgumentType == actualArgumentType {
+			argumentsValue[index] = argumentValue
+			continue
+		}
+
+		// type not match, check if convertible
+		if !actualArgumentType.ConvertibleTo(expectArgumentType) {
+			// function argument type not match and not convertible
+			err := fmt.Errorf("function argument %d's type is neither match nor convertible, expect %v, actual %v",
+				index, expectArgumentType, actualArgumentType)
+			return nil, err
+		}
+		// convert argument to expect type
+		argumentsValue[index] = argumentValue.Convert(expectArgumentType)
+	}
+	return argumentsValue, nil
+}
+
+func call(fn reflect.Value, args []reflect.Value) (interface{}, error) {
+	resultValues := fn.Call(args)
+	if resultValues == nil {
+		// no returns
+		return nil, nil
+	} else if len(resultValues) == 2 {
+		// return two arguments: interface{}, error
+		if resultValues[1].Interface() != nil {
+			return resultValues[0].Interface(), resultValues[1].Interface().(error)
+		} else {
+			return resultValues[0].Interface(), nil
+		}
+	} else if len(resultValues) == 1 {
+		// return one argument
+		if err, ok := resultValues[0].Interface().(error); ok {
+			// return error
+			return nil, err
+		} else {
+			// return interface{}
+			return resultValues[0].Interface(), nil
+		}
+	} else {
+		// return more than 2 arguments, unexpected
+		err := fmt.Errorf("function should return at most 2 values")
+		return nil, err
+	}
+}
diff --git a/plugin/shared/call_test.go b/plugin/shared/call_test.go
new file mode 100644
index 00000000..d886f2e0
--- /dev/null
+++ b/plugin/shared/call_test.go
@@ -0,0 +1,208 @@
+package shared
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+type data struct {
+	f      interface{}
+	args   []interface{}
+	expVal interface{}
+	expErr error
+}
+
+func TestCallFuncBasic(t *testing.T) {
+	params := []data{
+		// zero argument, zero return
+		{f: func() {}, args: []interface{}{}, expVal: nil, expErr: nil},
+		// zero argument, return one value
+		{f: func() int { return 1 }, args: []interface{}{}, expVal: 1, expErr: nil},
+		{f: func() string { return "a" }, args: []interface{}{}, expVal: "a", expErr: nil},
+		{f: func() interface{} { return 1.23 }, args: []interface{}{}, expVal: 1.23, expErr: nil},
+		// zero argument, return error
+		{f: func() error { return errors.New("xxx") }, args: []interface{}{}, expVal: nil, expErr: errors.New("xxx")},
+		// zero argument, return one value and error
+		{f: func() (int, error) { return 1, errors.New("xxx") }, args: []interface{}{}, expVal: 1, expErr: errors.New("xxx")},
+		{f: func() (interface{}, error) { return 1.23, errors.New("xxx") }, args: []interface{}{}, expVal: 1.23, expErr: errors.New("xxx")},
+
+		// one argument, zero return
+		{f: func(n int) {}, args: []interface{}{1}, expVal: nil, expErr: nil},
+		// one argument, return one value
+		{f: func(n int) int { return n * n }, args: []interface{}{2}, expVal: 4},
+		{f: func(c string) string { return c + c }, args: []interface{}{"p"}, expVal: "pp"},
+		{f: func(arg interface{}) interface{} { return fmt.Sprintf("%v", arg) }, args: []interface{}{1.23}, expVal: "1.23"},
+		// one argument, return one value and error
+		{f: func(arg interface{}) (interface{}, error) { return 1.23, errors.New("xxx") }, args: []interface{}{"a"}, expVal: 1.23, expErr: errors.New("xxx")},
+
+		// two arguments in same type
+		{f: func(a, b int) int { return a * b }, args: []interface{}{2, 3}, expVal: 6},
+		// two arguments in different type
+		{
+			f: func(n int, c string) string {
+				var s string
+				for i := 0; i < n; i++ {
+					s += c
+				}
+				return s
+			},
+			args:   []interface{}{3, "p"},
+			expVal: "ppp",
+		},
+
+		// variable arguments list: ...int, ...interface{}
+		{
+			f: func(n ...int) int {
+				var sum int
+				for _, arg := range n {
+					sum += arg
+				}
+				return sum
+			},
+			args:   []interface{}{1, 2, 3},
+			expVal: 6,
+		},
+		{
+			f: func(args ...interface{}) (interface{}, error) {
+				var result string
+				for _, arg := range args {
+					result += fmt.Sprintf("%v", arg)
+				}
+				return result, nil
+			},
+			args:   []interface{}{1, 2.3, "4.5", "p"},
+			expVal: "12.34.5p",
+		},
+		{
+			f: func(a, b int8, n ...int) int {
+				var sum int
+				for _, arg := range n {
+					sum += arg
+				}
+				sum += int(a) + int(b)
+				return sum
+			},
+			args:   []interface{}{1, 2, 3, 4.5},
+			expVal: 10,
+		},
+		{
+			f: func(a, b int8, n ...int) int {
+				sum := int(a) + int(b)
+				for _, arg := range n {
+					sum += arg
+				}
+				return sum
+			},
+			args:   []interface{}{1, 2},
+			expVal: 3,
+		},
+
+		{
+			f: func(a []int, n ...int) int {
+				var sum int
+				for _, arg := range a {
+					sum += arg
+				}
+				for _, arg := range n {
+					sum += arg
+				}
+				return sum
+			},
+			args:   []interface{}{[]int{1, 2}, 3, 4},
+			expVal: 10,
+		},
+	}
+
+	for _, p := range params {
+		fn := reflect.ValueOf(p.f)
+		val, err := CallFunc(fn, p.args...)
+		if !assert.Equal(t, p.expErr, err) {
+			t.Fatal(err)
+		}
+		if !assert.Equal(t, p.expVal, val) {
+			t.Fatal()
+		}
+	}
+
+}
+
+func TestCallFuncComplex(t *testing.T) {
+	params := []data{
+		// arguments include slice
+		{
+			f: func(a int, n []int, b int) int {
+				sum := a
+				for _, arg := range n {
+					sum += arg
+				}
+				sum += b
+				return sum
+			},
+			args:   []interface{}{1, []int{2, 3}, 4},
+			expVal: 10,
+		},
+		// last argument is slice
+		{
+			f: func(n []int) int {
+				var sum int
+				for _, arg := range n {
+					sum += arg
+				}
+				return sum
+			},
+			args:   []interface{}{[]int{1, 2, 3}},
+			expVal: 6,
+		},
+		{
+			f: func(a, b int, n []int) int {
+				sum := a + b
+				for _, arg := range n {
+					sum += arg
+				}
+				return sum
+			},
+			args:   []interface{}{1, 2, []int{3, 4}},
+			expVal: 10,
+		},
+	}
+
+	for _, p := range params {
+		fn := reflect.ValueOf(p.f)
+		val, err := CallFunc(fn, p.args...)
+		if !assert.Equal(t, p.expErr, err) {
+			t.Fatal(err)
+		}
+		if !assert.Equal(t, p.expVal, val) {
+			t.Fatal()
+		}
+	}
+
+}
+
+func TestCallFuncAbnormal(t *testing.T) {
+	params := []data{
+		// return more than 2 values
+		{
+			f:      func() (int, int, error) { return 1, 2, nil },
+			args:   []interface{}{},
+			expVal: nil,
+			expErr: fmt.Errorf("function should return at most 2 values"),
+		},
+	}
+
+	for _, p := range params {
+		fn := reflect.ValueOf(p.f)
+		val, err := CallFunc(fn, p.args...)
+		if !assert.Equal(t, p.expErr, err) {
+			t.Fatal(err)
+		}
+		if !assert.Equal(t, p.expVal, val) {
+			t.Fatal()
+		}
+	}
+
+}
diff --git a/plugin/shared/utils.go b/plugin/shared/utils.go
deleted file mode 100644
index a33a060b..00000000
--- a/plugin/shared/utils.go
+++ /dev/null
@@ -1,50 +0,0 @@
-package shared
-
-import (
-	"fmt"
-	"reflect"
-)
-
-// CallFunc calls function with arguments
-// it is used when calling go plugin or builtin functions
-func CallFunc(fn reflect.Value, args ...interface{}) (interface{}, error) {
-	fnArgsNum := fn.Type().NumIn()
-	if fnArgsNum > 0 && fn.Type().In(fnArgsNum-1).Kind() == reflect.Slice {
-		// last argument is slice, do not check arguments number
-		// e.g. ...interface{}
-		// e.g. a, b string, c ...interface{}
-	} else if fnArgsNum != len(args) {
-		// function arguments not match
-		return nil, fmt.Errorf("function arguments number not match, expect %d, got %d", fnArgsNum, len(args))
-	}
-	// arguments do not have slice, and arguments number matched
-
-	argumentsValue := make([]reflect.Value, len(args))
-	for index, argument := range args {
-		if argument == nil {
-			argumentsValue[index] = reflect.Zero(fn.Type().In(index))
-		} else {
-			argumentsValue[index] = reflect.ValueOf(args[index])
-		}
-	}
-
-	resultValues := fn.Call(argumentsValue)
-	if resultValues == nil {
-		// no returns
-		return nil, nil
-	} else if len(resultValues) == 2 {
-		// return two arguments: interface{}, error
-		if resultValues[1].Interface() != nil {
-			return resultValues[0].Interface(), resultValues[1].Interface().(error)
-		} else {
-			return resultValues[0].Interface(), nil
-		}
-	} else if len(resultValues) == 1 {
-		// return one arguments: interface{}
-		return resultValues[0].Interface(), nil
-	} else {
-		// return more than 2 arguments, unexpected
-		err := fmt.Errorf("function should return at most 2 arguments")
-		return nil, err
-	}
-}