【BUG FIX】FIX Batch norm op (#2846)

lite/operators/batch_norm_op.cc

@@ -82,7 +82,20 @@ bool BatchNormOp::AttachImpl(const cpp::OpDesc &op_desc, lite::Scope *scope) {
   param_.variance =
       scope->FindVar(op_desc.Input("Variance").front())->GetMutable<Tensor>();
   param_.y = scope->FindVar(op_desc.Output("Y").front())->GetMutable<Tensor>();
-  param_.is_test = op_desc.GetAttr<int>("is_test");
+
+  auto is_test_type = op_desc.GetAttrType("is_test");
+  switch (is_test_type) {
+    case OpDescAPI::AttrType::INT:
+      param_.is_test = op_desc.GetAttr<int>("is_test");
+      break;
+    case OpDescAPI::AttrType::BOOLEAN:
+      param_.is_test = op_desc.GetAttr<bool>("is_test");
+      break;
+    default:
+      LOG(FATAL) << "Unsupported attribute type: the type of attribute "
+                    "`is_test` in BatchNormOP should be int or bool.";
+  }
+
   if (op_desc.HasAttr("use_global_stats")) {
     param_.use_global_stats = op_desc.GetAttr<bool>("use_global_stats");
   }

lite/operators/batch_norm_op_test.cc

@@ -46,7 +46,7 @@ TEST(batch_norm_op_lite, test) {
   desc.SetInput("Mean", {"mean"});
   desc.SetInput("Variance", {"variance"});
   desc.SetOutput("Y", {"y"});
-  desc.SetAttr("is_test", static_cast<int>(1));
+  desc.SetAttr("is_test", static_cast<bool>(true));
   desc.SetAttr("use_global_stats", false);
   desc.SetAttr("epsilon", 1e-5f);
   desc.SetAttr("momentum", 0.9f);
@@ -101,7 +101,7 @@ TEST(batch_norm_op_lite, test_enable_is_test) {
   desc.SetOutput("VarianceOut", {"variance_out"});
   desc.SetOutput("SavedMean", {"saved_mean"});
   desc.SetOutput("SavedVariance", {"saved_variance"});
-  desc.SetAttr("is_test", static_cast<int>(0));
+  desc.SetAttr("is_test", static_cast<bool>(false));
   desc.SetAttr("use_global_stats", false);
   desc.SetAttr("epsilon", 1e-5f);
   desc.SetAttr("momentum", 0.9f);