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diff --git a/tests/nnfw_api/src/fixtures.h b/tests/nnfw_api/src/fixtures.h
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+++ b/tests/nnfw_api/src/fixtures.h
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+/*
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * 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.
+ */
+
+#ifndef __NNFW_API_TEST_FIXTURES_H__
+#define __NNFW_API_TEST_FIXTURES_H__
+
+#include <array>
+#include <gtest/gtest.h>
+#include <nnfw.h>
+
+#include "model_path.h"
+
+inline uint64_t num_elems(const nnfw_tensorinfo *ti)
+{
+  uint64_t n = 1;
+  for (uint32_t i = 0; i < ti->rank; ++i)
+  {
+    n *= ti->dims[i];
+  }
+  return n;
+}
+
+struct SessionObject
+{
+  nnfw_session *session = nullptr;
+  std::vector<std::vector<float>> inputs;
+  std::vector<std::vector<float>> outputs;
+};
+
+class ValidationTest : public ::testing::Test
+{
+protected:
+  void SetUp() override {}
+};
+
+class ValidationTestSessionCreated : public ValidationTest
+{
+protected:
+  void SetUp() override
+  {
+    ValidationTest::SetUp();
+    ASSERT_EQ(nnfw_create_session(&_session), NNFW_STATUS_NO_ERROR);
+  }
+
+  void TearDown() override
+  {
+    ASSERT_EQ(nnfw_close_session(_session), NNFW_STATUS_NO_ERROR);
+    ValidationTest::TearDown();
+  }
+
+protected:
+  nnfw_session *_session = nullptr;
+};
+
+template <int PackageNo> class ValidationTestModelLoaded : public ValidationTestSessionCreated
+{
+protected:
+  void SetUp() override
+  {
+    ValidationTestSessionCreated::SetUp();
+    ASSERT_EQ(nnfw_load_model_from_file(_session,
+                                        ModelPath::get().getModelAbsolutePath(PackageNo).c_str()),
+              NNFW_STATUS_NO_ERROR);
+    ASSERT_NE(_session, nullptr);
+  }
+
+  void TearDown() override { ValidationTestSessionCreated::TearDown(); }
+};
+
+template <int PackageNo> class ValidationTestFourModelsSetInput : public ValidationTest
+{
+protected:
+  static const uint32_t NUM_SESSIONS = 4;
+
+  void SetUp() override
+  {
+    ValidationTest::SetUp();
+
+    auto model_path = ModelPath::get().getModelAbsolutePath(ModelPath::ADD);
+    for (auto &obj : _objects)
+    {
+      ASSERT_EQ(nnfw_create_session(&obj.session), NNFW_STATUS_NO_ERROR);
+      ASSERT_EQ(nnfw_load_model_from_file(obj.session, model_path.c_str()), NNFW_STATUS_NO_ERROR);
+      ASSERT_EQ(nnfw_prepare(obj.session), NNFW_STATUS_NO_ERROR);
+
+      obj.inputs.resize(1);
+      nnfw_tensorinfo ti;
+      ASSERT_EQ(nnfw_input_tensorinfo(obj.session, 0, &ti), NNFW_STATUS_NO_ERROR);
+      uint64_t input_elements = num_elems(&ti);
+      obj.inputs[0].resize(input_elements);
+      ASSERT_EQ(nnfw_set_input(obj.session, 0, ti.dtype, obj.inputs[0].data(),
+                               sizeof(float) * input_elements),
+                NNFW_STATUS_NO_ERROR);
+
+      obj.outputs.resize(1);
+      nnfw_tensorinfo ti_output;
+      ASSERT_EQ(nnfw_output_tensorinfo(obj.session, 0, &ti_output), NNFW_STATUS_NO_ERROR);
+      uint64_t output_elements = num_elems(&ti_output);
+      obj.outputs[0].resize(output_elements);
+      ASSERT_EQ(nnfw_set_output(obj.session, 0, ti_output.dtype, obj.outputs[0].data(),
+                                sizeof(float) * output_elements),
+                NNFW_STATUS_NO_ERROR);
+    }
+  }
+
+  void TearDown() override
+  {
+    for (auto &obj : _objects)
+    {
+      ASSERT_EQ(nnfw_close_session(obj.session), NNFW_STATUS_NO_ERROR);
+    }
+    ValidationTest::TearDown();
+  }
+
+protected:
+  std::array<SessionObject, NUM_SESSIONS> _objects;
+};
+
+#endif // __NNFW_API_TEST_FIXTURES_H__