Add SelectedRows support for dygraph DebugString (#21415)

* add selected rows support for debug string, test=develop

* refactor unittest of debug string, test=develop

* polish unittest name, test=develop

paddle/fluid/imperative/layer.cc

@@ -140,6 +140,22 @@ static std::string DebugString(
         ss << "NOT_INITED";
       }
       ss << ">";
+    } else if (var.IsType<framework::SelectedRows>()) {
+      ss << "SelectedRows<";
+      auto& selected_rows = var.Get<framework::SelectedRows>();
+      auto& tensor = selected_rows.value();
+      auto& rows = selected_rows.rows();
+      if (tensor.IsInitialized()) {
+        ss << framework::DataTypeToString(tensor.type()) << ", ";
+        ss << tensor.place() << ", ";
+        ss << "height(" << selected_rows.height() << "), rows(";
+        std::for_each(rows.cbegin(), rows.cend(),
+                      [&ss](const int64_t r) { ss << r << " "; });
+        ss << "), dims(" << tensor.dims() << ")";
+      } else {
+        ss << "NOT_INITED";
+      }
+      ss << ">";
     } else {
       ss << "UNRESOLVED_TYPE";
     }

paddle/fluid/imperative/tests/test_layer.cc

@@ -61,34 +61,62 @@ std::string LayerDebugString(const std::string& op_type,
                              const NameVarBaseMap& ins,
                              const NameVarBaseMap& outs);
 
-TEST(test_layer, test_debug_string_test_debug_Test) {
+TEST(test_layer, test_debug_string) {
+  platform::CPUPlace place;
   std::shared_ptr<imperative::VarBase> vin(
       new imperative::VarBase(false, "vin"));
-  std::shared_ptr<imperative::VarBase> vin_error(
-      new imperative::VarBase(false, "vin_error"));
-  std::shared_ptr<imperative::VarBase> vout(
-      new imperative::VarBase(false, "vout"));
-  std::shared_ptr<imperative::VarBase> vout_error(
-      new imperative::VarBase(false, "vout_error"));
-  vin_error->MutableVar()->GetMutable<framework::LoDTensor>();
-  vout->MutableVar()->GetMutable<framework::LoDTensor>();
-  vout_error->MutableVar()->GetMutable<framework::SelectedRows>();
   var_pair in_pair = var_pair("X", vb_vector(1, vin));
-  vb_vector vb_in_error = {vin_error, nullptr};
-  var_pair vin_error_pair = var_pair("X", vb_in_error);
+
+  auto test_func = [&](std::shared_ptr<imperative::VarBase>& vout) {
     var_pair out_pair = var_pair("Out", vb_vector(1, vout));
-  var_pair vout_error_pair = var_pair("Out2", vb_vector(1, vout_error));
     imperative::NameVarBaseMap ins = {in_pair};
-  imperative::NameVarBaseMap ins_error = {vin_error_pair};
     imperative::NameVarBaseMap outs = {out_pair};
-  imperative::NameVarBaseMap outs_error = {vout_error_pair};
-  ASSERT_NO_FATAL_FAILURE(LayerDebugString("test_op", ins, outs));
-  std::string res = LayerDebugString("test_op", ins, outs_error);
-  ASSERT_TRUE(res.find("UNRESOLVED_TYPE") != std::string::npos);
-  std::string res2 = LayerDebugString("test_op", ins_error, outs_error);
-  VLOG(3) << res2;
-  ASSERT_TRUE(res2.find("NOT_INITED") != std::string::npos);
-  ASSERT_TRUE(res2.find("NULL") != std::string::npos);
+    return LayerDebugString("test_op", ins, outs);
+  };
+
+  // 1. test null
+  std::shared_ptr<imperative::VarBase> null_out(nullptr);
+  std::string res_null = test_func(null_out);
+  ASSERT_TRUE(res_null.find("NULL") != std::string::npos);
+
+  // 2. test uninit var
+  std::shared_ptr<imperative::VarBase> un_init_out(
+      new imperative::VarBase(false, "un_init_out"));
+  std::string res_un_init = test_func(un_init_out);
+  ASSERT_TRUE(res_un_init.find("NOT_INITED_VAR") != std::string::npos);
+
+  // 3. test unresolved type
+  std::shared_ptr<imperative::VarBase> ut_out(
+      new imperative::VarBase(false, "ut_out"));
+  ut_out->MutableVar()->GetMutable<framework::LoDTensorArray>();
+  std::string res_ut = test_func(ut_out);
+  ASSERT_TRUE(res_ut.find("UNRESOLVED_TYPE") != std::string::npos);
+
+  // 4. test uninit lod tensor
+  std::shared_ptr<imperative::VarBase> lod_tensor(
+      new imperative::VarBase(false, "lod_tensor"));
+  auto tensor_l = lod_tensor->MutableVar()->GetMutable<framework::LoDTensor>();
+  std::string res_ui_lod_t = test_func(lod_tensor);
+  ASSERT_TRUE(res_ui_lod_t.find("NOT_INITED") != std::string::npos);
+
+  // 5. test init lod tensor
+  tensor_l->mutable_data<float>(place);
+  std::string res_lod_t = test_func(lod_tensor);
+  ASSERT_TRUE(res_lod_t.find("LoDTensor") != std::string::npos);
+
+  // 6. test uninit selected rows
+  std::shared_ptr<imperative::VarBase> selected_rows(
+      new imperative::VarBase(false, "selected_rows"));
+  auto tensor_sr = selected_rows->MutableVar()
+                       ->GetMutable<framework::SelectedRows>()
+                       ->mutable_value();
+  std::string res_ui_sr = test_func(selected_rows);
+  ASSERT_TRUE(res_ui_sr.find("NOT_INITED") != std::string::npos);
+
+  // 7. test init selected rows
+  tensor_sr->mutable_data<float>(place);
+  std::string res_sr = test_func(selected_rows);
+  ASSERT_TRUE(res_sr.find("SelectedRows") != std::string::npos);
 }
 
 TEST(test_layer, test_clear_backward_info) {