fix useResults no default value bug (#91)

Signed-off-by: LiHeng <henrytlh@hotmail.com>

Signed-off-by: LiHeng <henrytlh@hotmail.com>

Author: brlala

model/action.go

@@ -41,6 +41,21 @@ type Action struct {
 	Condition string `json:"condition,omitempty"`
 }
 
+type actionForUnmarshal Action
+
+// UnmarshalJSON ...
+func (a *Action) UnmarshalJSON(data []byte) error {
+	v := actionForUnmarshal{
+		ActionDataFilter: ActionDataFilter{UseResults: true},
+	}
+	err := json.Unmarshal(data, &v)
+	if err != nil {
+		return err
+	}
+	*a = Action(v)
+	return nil
+}
+
 // FunctionRef ...
 type FunctionRef struct {
 	// Name of the referenced function

parser/parser_test.go

@@ -19,8 +19,9 @@ import (
 	"path/filepath"
 	"testing"
 
-	"github.com/serverlessworkflow/sdk-go/v2/model"
 	"github.com/stretchr/testify/assert"
+
+	"github.com/serverlessworkflow/sdk-go/v2/model"
 )
 
 func TestBasicValidation(t *testing.T) {
@@ -63,6 +64,14 @@ func TestFromFile(t *testing.T) {
 				assert.IsType(t, &model.OperationState{}, w.States[0])
 				assert.Equal(t, "greetingFunction", w.States[0].(*model.OperationState).Actions[0].FunctionRef.RefName)
 			},
+		}, {
+			"./testdata/workflows/actiondata-defaultvalue.yaml",
+			func(t *testing.T, w *model.Workflow) {
+				assert.Equal(t, "greeting", w.ID)
+				assert.IsType(t, &model.OperationState{}, w.States[0].(*model.OperationState))
+				assert.Equal(t, true, w.States[0].(*model.OperationState).Actions[0].ActionDataFilter.UseResults)
+				assert.Equal(t, "greeting", w.States[0].(*model.OperationState).Actions[0].Name)
+			},
 		}, {
 			"./testdata/workflows/greetings.sw.yaml",
 			func(t *testing.T, w *model.Workflow) {

parser/testdata/workflows/actiondata-defaultvalue.yaml

@@ -0,0 +1,34 @@
+# Copyright 2020 The Serverless Workflow Specification Authors
+#
+# 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.
+
+id: greeting
+version: '1.0'
+name: Greeting Workflow
+description: Greet Someone
+specVersion: "0.8"
+start:
+  stateName: Greet
+functions:
+  - name: greetingFunction
+    operation: file://myapis/greetingapis.json#greeting
+states:
+  - id: greetingId
+    name: Greet
+    type: operation
+    actions:
+      - name: greeting
+        functionRef:
+          refName: greetingFunction
+    end:
+      terminate: true