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+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Copyright (c) 2015-2016 Western Digital Corporation or its affiliates.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+# MA 02110-1301, USA.
+#
+# Author: Chaitanya Kulkarni <chaitanya.kulkarni@hgst.com>
+#
+"""
+NVMe Read/Write Testcae:-
+
+ 1. Create data file with specific pattern outside of the device under test.
+ 2. Write data file on the namespace under test.
+ 3. Read the data from the namespace under test into different file.
+ 4. Compare file in #1 and #3.
+"""
+
+import filecmp
+
+from nvme_test_io import TestNVMeIO
+
+
+class TestNVMeReadWriteTest(TestNVMeIO):
+
+ """
+ Represents NVMe read, write testcase.
+
+ - Attributes:
+ - start_block : starting block of to perform IO.
+ - compare_file : data file to use in nvme compare command.
+ - test_log_dir : directory for logs, temp files.
+ """
+
+ def setUp(self):
+ """ Pre Section for TestNVMeReadWriteTest """
+ super().setUp()
+ self.start_block = 1023
+ self.test_log_dir = self.log_dir + "/" + self.__class__.__name__
+ self.setup_log_dir(self.__class__.__name__)
+ self.write_file = self.test_log_dir + "/" + self.write_file
+ self.read_file = self.test_log_dir + "/" + self.read_file
+ self.create_data_file(self.write_file, self.data_size, "15")
+ open(self.read_file, 'a').close()
+
+ def tearDown(self):
+ """ Post Section for TestNVMeReadWriteTest """
+ super().tearDown()
+
+ def read_validate(self):
+ """ Validate the data file read
+ - Args:
+ - None
+ - Returns:
+ - returns 0 on success, 1 on failure.
+ """
+ return 0 if filecmp.cmp(self.read_file, self.write_file) else 1
+
+ def test_nvme_write(self):
+ """ Testcaes main """
+ self.assertEqual(self.nvme_write(), 0)
+ self.assertEqual(self.nvme_read(), 0)
+ self.assertEqual(self.read_validate(), 0)