osbuild: add test for NewMkswapStage()

pkg/osbuild/mkswap_stage_test.go

@@ -0,0 +1,37 @@
+package osbuild
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+var expectedJSON = `{
+  "type": "org.osbuild.mkswap",
+  "options": {
+    "uuid": "8a1fc521-02a0-4917-92a9-90a44d7e6503",
+    "label": "some-label"
+  },
+  "devices": {
+    "root": {
+      "type": "org.osbuild.loopback"
+    }
+  }
+}`
+
+func TestNewMkswapStage(t *testing.T) {
+	devices := make(map[string]Device)
+	devices["root"] = Device{
+		Type: "org.osbuild.loopback",
+	}
+
+	options := MkswapStageOptions{
+		UUID:  "8a1fc521-02a0-4917-92a9-90a44d7e6503",
+		Label: "some-label",
+	}
+	stage := NewMkswapStage(&options, devices)
+	b, err := json.MarshalIndent(stage, "", "  ")
+	assert.NoError(t, err)
+	assert.Equal(t, expectedJSON, string(b))
+}