1 files changed, 105 insertions, 0 deletions
diff --git a/tests/nvme_writezeros_test.py b/tests/nvme_writezeros_test.py
new file mode 100644
index 0000000..3231e3d
--- /dev/null
+++ b/tests/nvme_writezeros_test.py
@@ -0,0 +1,105 @@
+# 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 Write Zeros:-
+
+    1. Issue a write command to block of data.
+    2. Read from same block to verify data pattern.
+    3. Issue write zeros to the block of data.
+    4. Read from same block, should be all zeroes.
+
+"""
+
+import filecmp
+
+from nvme_test_io import TestNVMeIO
+
+
+class TestNVMeWriteZeros(TestNVMeIO):
+
+    """
+    Represents NVMe Write Zero Testcase.
+
+        - Attributes:
+              - zero_file : file with all '\0' to compare the zero data.
+              - data_size : data size to perform IO.
+              - start_block : starting block of to perform IO.
+              - block_count: Number of blocks to use in IO.
+              - test_log_dir : directory for logs, temp files.
+    """
+
+    def setUp(self):
+        """ Pre Section for TestNVMeWriteZeros """
+        super().setUp()
+        self.start_block = 1023
+        self.block_count = 0
+        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.zero_file = self.test_log_dir + "/" + "zero_file.txt"
+        self.create_data_file(self.write_file, self.data_size, "15")
+        self.create_data_file(self.zero_file, self.data_size, '\0')
+        open(self.read_file, 'a').close()
+
+    def tearDown(self):
+        """ Post Section for TestNVMeWriteZeros """
+        super().tearDown()
+
+    def write_zeroes(self):
+        """ Wrapper for nvme write-zeroe
+            - Args:
+                - None
+            - Returns:
+                - return code for nvme write command.
+        """
+        write_zeroes_cmd = "nvme write-zeroes " + self.ns1 + \
+                           " --start-block=" + str(self.start_block) + \
+                           " --block-count=" + str(self.block_count)
+        return self.exec_cmd(write_zeroes_cmd)
+
+    def validate_write_read(self):
+        """ Validate the file which had been read from the device
+            - Args:
+                - None
+            - Returns:
+                - 0 on success, 1 on failure
+        """
+        return 0 if filecmp.cmp(self.write_file, self.read_file) is True else 1
+
+    def validate_zeroes(self):
+        """
+        Validate the data which is zeroed out via write-zeroes
+            - Args:
+                - None
+            - Returns:
+                - 0 on success, 1 on failure
+         """
+        return 0 if filecmp.cmp(self.zero_file, self.read_file) is True else 1
+
+    def test_write_zeros(self):
+        """ Testcae main """
+        self.assertEqual(self.nvme_write(), 0)
+        self.assertEqual(self.nvme_read(), 0)
+        self.assertEqual(self.validate_write_read(), 0)
+        self.assertEqual(self.write_zeroes(), 0)
+        self.assertEqual(self.nvme_read(), 0)
+        self.assertEqual(self.validate_zeroes(), 0)