diff --git a/pipeline/actions.go b/pipeline/actions.go
index 5317273..32a397d 100644
--- a/pipeline/actions.go
+++ b/pipeline/actions.go
@@ -139,33 +139,6 @@ func (ps *PatchOp) CloneWith(ctx ActionContext) Action {
 	}
 }
 
-func (sa *SetOp) String() string {
-	return fmt.Sprintf("Set[Path=%s]", sa.Path)
-}
-
-func (sa *SetOp) Do(ctx ActionContext) error {
-	gd := ctx.Data()
-	if sa.Data == nil {
-		return ErrNoDataToSet
-	}
-	data := ctx.Factory().FromMap(sa.Data)
-	if len(sa.Path) > 0 {
-		gd.AddValueAt(sa.Path, data)
-	} else {
-		for k, v := range data.Children() {
-			gd.AddValueAt(k, v)
-		}
-	}
-	return nil
-}
-
-func (sa *SetOp) CloneWith(ctx ActionContext) Action {
-	return &SetOp{
-		Data: sa.Data,
-		Path: ctx.TemplateEngine().RenderLenient(sa.Path, ctx.Snapshot()),
-	}
-}
-
 func (ts *TemplateOp) String() string {
 	return fmt.Sprintf("Template[WriteTo=%s]", ts.WriteTo)
 }
diff --git a/pipeline/actions_test.go b/pipeline/actions_test.go
index 81d2434..09c2c8c 100644
--- a/pipeline/actions_test.go
+++ b/pipeline/actions_test.go
@@ -161,38 +161,6 @@ func TestExecutePatchOp(t *testing.T) {
 	assert.Error(t, New(WithData(gd)).Execute(&ps))
 }
 
-func TestExecuteSetOp(t *testing.T) {
-	var (
-		ss  SetOp
-		gd  dom.ContainerBuilder
-		err error
-	)
-	ss = SetOp{
-		Data: map[string]interface{}{
-			"sub1": 123,
-		},
-	}
-	gd = b.Container()
-	assert.NoError(t, New(WithData(gd)).Execute(&ss))
-	assert.Equal(t, 123, gd.Lookup("sub1").(dom.Leaf).Value())
-
-	ss = SetOp{
-		Data: map[string]interface{}{
-			"sub1": 123,
-		},
-		Path: "sub0",
-	}
-	gd = b.Container()
-	assert.NoError(t, New(WithData(gd)).Execute(&ss))
-	assert.Equal(t, 123, gd.Lookup("sub0.sub1").(dom.Leaf).Value())
-	assert.Contains(t, ss.String(), "sub0")
-
-	ss = SetOp{}
-	err = New(WithData(gd)).Execute(&ss)
-	assert.Error(t, err)
-	assert.Equal(t, ErrNoDataToSet, err)
-}
-
 func TestExecuteTemplateOp(t *testing.T) {
 	var (
 		err error
diff --git a/pipeline/set_op.go b/pipeline/set_op.go
new file mode 100644
index 0000000..a6484e7
--- /dev/null
+++ b/pipeline/set_op.go
@@ -0,0 +1,48 @@
+/*
+Copyright 2024 Richard Kosegi
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package pipeline
+
+import (
+	"fmt"
+)
+
+func (sa *SetOp) String() string {
+	return fmt.Sprintf("Set[Path=%s]", sa.Path)
+}
+
+func (sa *SetOp) Do(ctx ActionContext) error {
+	gd := ctx.Data()
+	if sa.Data == nil {
+		return ErrNoDataToSet
+	}
+	data := ctx.Factory().FromMap(sa.Data)
+	if len(sa.Path) > 0 {
+		gd.AddValueAt(sa.Path, data)
+	} else {
+		for k, v := range data.Children() {
+			gd.AddValueAt(k, v)
+		}
+	}
+	return nil
+}
+
+func (sa *SetOp) CloneWith(ctx ActionContext) Action {
+	return &SetOp{
+		Data: sa.Data,
+		Path: ctx.TemplateEngine().RenderLenient(sa.Path, ctx.Snapshot()),
+	}
+}
diff --git a/pipeline/set_op_test.go b/pipeline/set_op_test.go
new file mode 100644
index 0000000..d1787d8
--- /dev/null
+++ b/pipeline/set_op_test.go
@@ -0,0 +1,55 @@
+/*
+Copyright 2024 Richard Kosegi
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package pipeline
+
+import (
+	"github.com/rkosegi/yaml-toolkit/dom"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestExecuteSetOp(t *testing.T) {
+	var (
+		ss  SetOp
+		gd  dom.ContainerBuilder
+		err error
+	)
+	ss = SetOp{
+		Data: map[string]interface{}{
+			"sub1": 123,
+		},
+	}
+	gd = b.Container()
+	assert.NoError(t, New(WithData(gd)).Execute(&ss))
+	assert.Equal(t, 123, gd.Lookup("sub1").(dom.Leaf).Value())
+
+	ss = SetOp{
+		Data: map[string]interface{}{
+			"sub1": 123,
+		},
+		Path: "sub0",
+	}
+	gd = b.Container()
+	assert.NoError(t, New(WithData(gd)).Execute(&ss))
+	assert.Equal(t, 123, gd.Lookup("sub0.sub1").(dom.Leaf).Value())
+	assert.Contains(t, ss.String(), "sub0")
+
+	ss = SetOp{}
+	err = New(WithData(gd)).Execute(&ss)
+	assert.Error(t, err)
+	assert.Equal(t, ErrNoDataToSet, err)
+}