diff --git a/tests/ut/ge/graph/build/graph_mem_assigner_unittest.cc b/tests/ut/ge/graph/build/graph_mem_assigner_unittest.cc
new file mode 100644
index 00000000..983f1763
--- /dev/null
+++ b/tests/ut/ge/graph/build/graph_mem_assigner_unittest.cc
@@ -0,0 +1,85 @@
+/**
+ * Copyright 2019-2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+#include <memory>
+
+#include "graph/anchor.h"
+#include "graph/attr_value.h"
+#include "graph/debug/ge_attr_define.h"
+#include "graph/utils/graph_utils.h"
+#include "graph/utils/node_utils.h"
+#include "graph/utils/op_desc_utils.h"
+#include "graph/utils/tensor_utils.h"
+#include "omg/omg_inner_types.h"
+#include "../passes/graph_builder_utils.h"
+
+#define protected public
+#define private public
+#include "graph/build/memory/binary_block_mem_assigner.h"
+#include "graph/build/memory/graph_mem_assigner_unittest.h"
+#include "graph/build/memory/hybrid_mem_assigner.h"
+#include "graph/build/memory/max_block_mem_assigner.h"
+#include "graph/manager/graph_var_manager.h"
+#undef protected
+#undef private
+
+using namespace std;
+using namespace testing;
+using namespace ge;
+using domi::GetContext;
+
+class UtestTaskGeneratorTest : public testing::Test {
+ public:
+    ge::ComputeGraphPtr BuildGraphWithVar(int64_t session_id) {
+      // init
+      MemManager::Instance().Initialize(std::vector<rtMemType_t>({RT_MEMORY_HBM}));
+      VarManager::Instance(session_id)->Init(0, 0, 0, 0);
+      ge::ut::GraphBuilder builder("graph");
+      auto var_input = builder.AddNode("var", "Variable", 1, 1);
+      auto const_input = builder.AddNode("const", "Const", 1, 1);
+      auto assign = builder.AddNode("assgin", "Assign", 2, 1);
+      // add link
+      builder.AddDataEdge(var_input, 0, assign, 0);
+      builder.AddDataEdge(const_input, 0, assign, 1);
+      // set offset
+      var_input->GetOpDesc()->SetOutputOffset({10000});
+      const_input->GetOpDesc()->SetOutputOffset({1000});
+      assign->GetOpDesc()->SetInputOffset({10100, 1000});
+      assign->GetOpDesc()->SetOutputOffset({10100});
+      // set inner offset
+      int64_t inner_offset = 100;
+      ge::AttrUtils::SetInt(assign->GetOpDesc()->MutableInputDesc(0), ATTR_NAME_INNER_OFFSET, inner_offset);
+      ge::AttrUtils::SetInt(assign->GetOpDesc()->MutableOutputDesc(0), ATTR_NAME_INNER_OFFSET, inner_offset);
+      // add var addr
+      VarManager::Instance(session_id)->var_resource_->var_offset_map_.emplace(10000, RT_MEMORY_HBM);
+
+      return builder.GetGraph();
+    }
+
+protected:
+    void SetUp() {}
+    void TearDown() {}
+};
+
+TEST_F(UtestMemoryAssignerTest, graph_memory_assign_continuous_input) {
+  ge::ComputeGraphPtr compute_graph = make_shared<ge::ComputeGraph>("");
+  GraphMemoryAssigner graph_mem_assigner(compute_graph);
+  map<uint64_t, size_t> mem_type_to_offset = {};
+  Status ret = ReAssignMemory(false, mem_type_to_offset);
+  EXPECT_EQ(ret, ge::FAILED);
+}
+