tests: add examples with scaffold

hrp/internal/scaffold/examples_test.go

@@ -0,0 +1,29 @@
+package scaffold
+
+import (
+	"os"
+	"testing"
+)
+
+func TestGenDemoExamples(t *testing.T) {
+	dir := "../../../examples/demo-with-go-plugin"
+	os.RemoveAll(dir)
+	err := CreateScaffold(dir, Go)
+	if err != nil {
+		t.Fail()
+	}
+
+	dir = "../../../examples/demo-with-py-plugin"
+	os.RemoveAll(dir)
+	err = CreateScaffold(dir, Py)
+	if err != nil {
+		t.Fail()
+	}
+
+	dir = "../../../examples/demo-without-plugin"
+	os.RemoveAll(dir)
+	err = CreateScaffold(dir, Ignore)
+	if err != nil {
+		t.Fail()
+	}
+}