support list/map/scalar for on and needs

Signed-off-by: Casey Lee <cplee@nektos.com>

act/model/workflow_test.go

@@ -0,0 +1,68 @@
+package model
+
+import (
+	"strings"
+	"testing"
+
+	"gotest.tools/assert"
+)
+
+func TestReadWorkflow_StringEvent(t *testing.T) {
+	yaml := `
+name: local-action-docker-url
+on: push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: ./actions/docker-url
+`
+
+	workflow, err := ReadWorkflow(strings.NewReader(yaml))
+	assert.NilError(t, err, "read workflow should succeed")
+
+	assert.DeepEqual(t, workflow.On(), []string{"push"})
+}
+
+func TestReadWorkflow_ListEvent(t *testing.T) {
+	yaml := `
+name: local-action-docker-url
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: ./actions/docker-url
+`
+
+	workflow, err := ReadWorkflow(strings.NewReader(yaml))
+	assert.NilError(t, err, "read workflow should succeed")
+
+	assert.DeepEqual(t, workflow.On(), []string{"push", "pull_request"})
+}
+
+func TestReadWorkflow_MapEvent(t *testing.T) {
+	yaml := `
+name: local-action-docker-url
+on: 
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: ./actions/docker-url
+`
+
+	workflow, err := ReadWorkflow(strings.NewReader(yaml))
+	assert.NilError(t, err, "read workflow should succeed")
+
+	assert.DeepEqual(t, workflow.On(), []string{"push", "pull_request"})
+}