diff --git a/testgres/operations/local_ops.py b/testgres/operations/local_ops.py
index 93a64787..35e94210 100644
--- a/testgres/operations/local_ops.py
+++ b/testgres/operations/local_ops.py
@@ -156,7 +156,8 @@ def find_executable(self, executable):
 
     def is_executable(self, file):
         # Check if the file is executable
-        return os.stat(file).st_mode & stat.S_IXUSR
+        assert stat.S_IXUSR != 0
+        return (os.stat(file).st_mode & stat.S_IXUSR) == stat.S_IXUSR
 
     def set_env(self, var_name, var_val):
         # Check if the directory is already in PATH
diff --git a/testgres/operations/os_ops.py b/testgres/operations/os_ops.py
index f20a7a30..3c606871 100644
--- a/testgres/operations/os_ops.py
+++ b/testgres/operations/os_ops.py
@@ -77,6 +77,9 @@ def pathsep(self):
     def mkdtemp(self, prefix=None):
         raise NotImplementedError()
 
+    def mkstemp(self, prefix=None):
+        raise NotImplementedError()
+
     def copytree(self, src, dst):
         raise NotImplementedError()
 
diff --git a/tests/test_local.py b/tests/test_local.py
index 3ae93f76..7b5e488d 100644
--- a/tests/test_local.py
+++ b/tests/test_local.py
@@ -3,15 +3,9 @@
 
 import pytest
 import re
-import tempfile
-import logging
 
-from ..testgres import ExecUtilException
-from ..testgres import InvalidOperationException
 from ..testgres import LocalOperations
 
-from .helpers.run_conditions import RunConditions
-
 
 class TestLocalOperations:
 
@@ -19,138 +13,6 @@ class TestLocalOperations:
     def setup(self):
         self.operations = LocalOperations()
 
-    def test_mkdtemp__default(self):
-        path = self.operations.mkdtemp()
-        logging.info("Path is [{0}].".format(path))
-        assert os.path.exists(path)
-        os.rmdir(path)
-        assert not os.path.exists(path)
-
-    def test_mkdtemp__custom(self):
-        C_TEMPLATE = "abcdef"
-        path = self.operations.mkdtemp(C_TEMPLATE)
-        logging.info("Path is [{0}].".format(path))
-        assert os.path.exists(path)
-        assert C_TEMPLATE in os.path.basename(path)
-        os.rmdir(path)
-        assert not os.path.exists(path)
-
-    def test_exec_command_success(self):
-        """
-        Test exec_command for successful command execution.
-        """
-        RunConditions.skip_if_windows()
-
-        cmd = "python3 --version"
-        response = self.operations.exec_command(cmd, wait_exit=True, shell=True)
-
-        assert b'Python 3.' in response
-
-    def test_exec_command_failure(self):
-        """
-        Test exec_command for command execution failure.
-        """
-        RunConditions.skip_if_windows()
-
-        cmd = "nonexistent_command"
-        while True:
-            try:
-                self.operations.exec_command(cmd, wait_exit=True, shell=True)
-            except ExecUtilException as e:
-                assert type(e.exit_code) == int  # noqa: E721
-                assert e.exit_code == 127
-
-                assert type(e.message) == str  # noqa: E721
-                assert type(e.error) == bytes  # noqa: E721
-
-                assert e.message.startswith("Utility exited with non-zero code (127). Error:")
-                assert "nonexistent_command" in e.message
-                assert "not found" in e.message
-                assert b"nonexistent_command" in e.error
-                assert b"not found" in e.error
-                break
-            raise Exception("We wait an exception!")
-
-    def test_exec_command_failure__expect_error(self):
-        """
-        Test exec_command for command execution failure.
-        """
-        RunConditions.skip_if_windows()
-
-        cmd = "nonexistent_command"
-
-        exit_status, result, error = self.operations.exec_command(cmd, verbose=True, wait_exit=True, shell=True, expect_error=True)
-
-        assert exit_status == 127
-        assert result == b''
-        assert type(error) == bytes  # noqa: E721
-        assert b"nonexistent_command" in error
-        assert b"not found" in error
-
-    def test_listdir(self):
-        """
-        Test listdir for listing directory contents.
-        """
-        path = "/etc"
-        files = self.operations.listdir(path)
-        assert isinstance(files, list)
-        for f in files:
-            assert f is not None
-            assert type(f) == str  # noqa: E721
-
-    def test_read__text(self):
-        """
-        Test LocalOperations::read for text data.
-        """
-        filename = __file__  # current file
-
-        with open(filename, 'r') as file:  # open in a text mode
-            response0 = file.read()
-
-        assert type(response0) == str  # noqa: E721
-
-        response1 = self.operations.read(filename)
-        assert type(response1) == str  # noqa: E721
-        assert response1 == response0
-
-        response2 = self.operations.read(filename, encoding=None, binary=False)
-        assert type(response2) == str  # noqa: E721
-        assert response2 == response0
-
-        response3 = self.operations.read(filename, encoding="")
-        assert type(response3) == str  # noqa: E721
-        assert response3 == response0
-
-        response4 = self.operations.read(filename, encoding="UTF-8")
-        assert type(response4) == str  # noqa: E721
-        assert response4 == response0
-
-    def test_read__binary(self):
-        """
-        Test LocalOperations::read for binary data.
-        """
-        filename = __file__  # current file
-
-        with open(filename, 'rb') as file:  # open in a binary mode
-            response0 = file.read()
-
-        assert type(response0) == bytes  # noqa: E721
-
-        response1 = self.operations.read(filename, binary=True)
-        assert type(response1) == bytes  # noqa: E721
-        assert response1 == response0
-
-    def test_read__binary_and_encoding(self):
-        """
-        Test LocalOperations::read for binary data and encoding.
-        """
-        filename = __file__  # current file
-
-        with pytest.raises(
-                InvalidOperationException,
-                match=re.escape("Enconding is not allowed for read binary operation")):
-            self.operations.read(filename, encoding="", binary=True)
-
     def test_read__unknown_file(self):
         """
         Test LocalOperations::read with unknown file.
@@ -159,40 +21,6 @@ def test_read__unknown_file(self):
         with pytest.raises(FileNotFoundError, match=re.escape("[Errno 2] No such file or directory: '/dummy'")):
             self.operations.read("/dummy")
 
-    def test_read_binary__spec(self):
-        """
-        Test LocalOperations::read_binary.
-        """
-        filename = __file__  # current file
-
-        with open(filename, 'rb') as file:  # open in a binary mode
-            response0 = file.read()
-
-        assert type(response0) == bytes  # noqa: E721
-
-        response1 = self.operations.read_binary(filename, 0)
-        assert type(response1) == bytes  # noqa: E721
-        assert response1 == response0
-
-        response2 = self.operations.read_binary(filename, 1)
-        assert type(response2) == bytes  # noqa: E721
-        assert len(response2) < len(response1)
-        assert len(response2) + 1 == len(response1)
-        assert response2 == response1[1:]
-
-        response3 = self.operations.read_binary(filename, len(response1))
-        assert type(response3) == bytes  # noqa: E721
-        assert len(response3) == 0
-
-        response4 = self.operations.read_binary(filename, len(response2))
-        assert type(response4) == bytes  # noqa: E721
-        assert len(response4) == 1
-        assert response4[0] == response1[len(response1) - 1]
-
-        response5 = self.operations.read_binary(filename, len(response1) + 1)
-        assert type(response5) == bytes  # noqa: E721
-        assert len(response5) == 0
-
     def test_read_binary__spec__unk_file(self):
         """
         Test LocalOperations::read_binary with unknown file.
@@ -203,29 +31,6 @@ def test_read_binary__spec__unk_file(self):
                 match=re.escape("[Errno 2] No such file or directory: '/dummy'")):
             self.operations.read_binary("/dummy", 0)
 
-    def test_read_binary__spec__negative_offset(self):
-        """
-        Test LocalOperations::read_binary with negative offset.
-        """
-
-        with pytest.raises(
-                ValueError,
-                match=re.escape("Negative 'offset' is not supported.")):
-            self.operations.read_binary(__file__, -1)
-
-    def test_get_file_size(self):
-        """
-        Test LocalOperations::get_file_size.
-        """
-        filename = __file__  # current file
-
-        sz0 = os.path.getsize(filename)
-        assert type(sz0) == int  # noqa: E721
-
-        sz1 = self.operations.get_file_size(filename)
-        assert type(sz1) == int  # noqa: E721
-        assert sz1 == sz0
-
     def test_get_file_size__unk_file(self):
         """
         Test LocalOperations::get_file_size.
@@ -234,70 +39,6 @@ def test_get_file_size__unk_file(self):
         with pytest.raises(FileNotFoundError, match=re.escape("[Errno 2] No such file or directory: '/dummy'")):
             self.operations.get_file_size("/dummy")
 
-    def test_isfile_true(self):
-        """
-        Test isfile for an existing file.
-        """
-        filename = __file__
-
-        response = self.operations.isfile(filename)
-
-        assert response is True
-
-    def test_isfile_false__not_exist(self):
-        """
-        Test isfile for a non-existing file.
-        """
-        filename = os.path.join(os.path.dirname(__file__), "nonexistent_file.txt")
-
-        response = self.operations.isfile(filename)
-
-        assert response is False
-
-    def test_isfile_false__directory(self):
-        """
-        Test isfile for a firectory.
-        """
-        name = os.path.dirname(__file__)
-
-        assert self.operations.isdir(name)
-
-        response = self.operations.isfile(name)
-
-        assert response is False
-
-    def test_isdir_true(self):
-        """
-        Test isdir for an existing directory.
-        """
-        name = os.path.dirname(__file__)
-
-        response = self.operations.isdir(name)
-
-        assert response is True
-
-    def test_isdir_false__not_exist(self):
-        """
-        Test isdir for a non-existing directory.
-        """
-        name = os.path.join(os.path.dirname(__file__), "it_is_nonexistent_directory")
-
-        response = self.operations.isdir(name)
-
-        assert response is False
-
-    def test_isdir_false__file(self):
-        """
-        Test isdir for a file.
-        """
-        name = __file__
-
-        assert self.operations.isfile(name)
-
-        response = self.operations.isdir(name)
-
-        assert response is False
-
     def test_cwd(self):
         """
         Test cwd.
@@ -314,71 +55,3 @@ def test_cwd(self):
 
         # Comp result
         assert v == expectedValue
-
-    class tagWriteData001:
-        def __init__(self, sign, source, cp_rw, cp_truncate, cp_binary, cp_data, result):
-            self.sign = sign
-            self.source = source
-            self.call_param__rw = cp_rw
-            self.call_param__truncate = cp_truncate
-            self.call_param__binary = cp_binary
-            self.call_param__data = cp_data
-            self.result = result
-
-    sm_write_data001 = [
-        tagWriteData001("A001", "1234567890", False, False, False, "ABC", "1234567890ABC"),
-        tagWriteData001("A002", b"1234567890", False, False, True, b"ABC", b"1234567890ABC"),
-
-        tagWriteData001("B001", "1234567890", False, True, False, "ABC", "ABC"),
-        tagWriteData001("B002", "1234567890", False, True, False, "ABC1234567890", "ABC1234567890"),
-        tagWriteData001("B003", b"1234567890", False, True, True, b"ABC", b"ABC"),
-        tagWriteData001("B004", b"1234567890", False, True, True, b"ABC1234567890", b"ABC1234567890"),
-
-        tagWriteData001("C001", "1234567890", True, False, False, "ABC", "1234567890ABC"),
-        tagWriteData001("C002", b"1234567890", True, False, True, b"ABC", b"1234567890ABC"),
-
-        tagWriteData001("D001", "1234567890", True, True, False, "ABC", "ABC"),
-        tagWriteData001("D002", "1234567890", True, True, False, "ABC1234567890", "ABC1234567890"),
-        tagWriteData001("D003", b"1234567890", True, True, True, b"ABC", b"ABC"),
-        tagWriteData001("D004", b"1234567890", True, True, True, b"ABC1234567890", b"ABC1234567890"),
-
-        tagWriteData001("E001", "\0001234567890\000", False, False, False, "\000ABC\000", "\0001234567890\000\000ABC\000"),
-        tagWriteData001("E002", b"\0001234567890\000", False, False, True, b"\000ABC\000", b"\0001234567890\000\000ABC\000"),
-
-        tagWriteData001("F001", "a\nb\n", False, False, False, ["c", "d"], "a\nb\nc\nd\n"),
-        tagWriteData001("F002", b"a\nb\n", False, False, True, [b"c", b"d"], b"a\nb\nc\nd\n"),
-
-        tagWriteData001("G001", "a\nb\n", False, False, False, ["c\n\n", "d\n"], "a\nb\nc\nd\n"),
-        tagWriteData001("G002", b"a\nb\n", False, False, True, [b"c\n\n", b"d\n"], b"a\nb\nc\nd\n"),
-    ]
-
-    @pytest.fixture(
-        params=sm_write_data001,
-        ids=[x.sign for x in sm_write_data001],
-    )
-    def write_data001(self, request):
-        assert isinstance(request, pytest.FixtureRequest)
-        assert type(request.param) == __class__.tagWriteData001  # noqa: E721
-        return request.param
-
-    def test_write(self, write_data001):
-        assert type(write_data001) == __class__.tagWriteData001  # noqa: E721
-
-        mode = "w+b" if write_data001.call_param__binary else "w+"
-
-        with tempfile.NamedTemporaryFile(mode=mode, delete=True) as tmp_file:
-            tmp_file.write(write_data001.source)
-            tmp_file.flush()
-
-            self.operations.write(
-                tmp_file.name,
-                write_data001.call_param__data,
-                read_and_write=write_data001.call_param__rw,
-                truncate=write_data001.call_param__truncate,
-                binary=write_data001.call_param__binary)
-
-            tmp_file.seek(0)
-
-            s = tmp_file.read()
-
-            assert s == write_data001.result
diff --git a/tests/test_os_ops_common.py b/tests/test_os_ops_common.py
new file mode 100644
index 00000000..c3944c3b
--- /dev/null
+++ b/tests/test_os_ops_common.py
@@ -0,0 +1,650 @@
+# coding: utf-8
+from .helpers.os_ops_descrs import OsOpsDescr
+from .helpers.os_ops_descrs import OsOpsDescrs
+from .helpers.os_ops_descrs import OsOperations
+from .helpers.run_conditions import RunConditions
+
+import os
+
+import pytest
+import re
+import tempfile
+import logging
+
+from ..testgres import InvalidOperationException
+from ..testgres import ExecUtilException
+
+
+class TestOsOpsCommon:
+    sm_os_ops_descrs: list[OsOpsDescr] = [
+        OsOpsDescrs.sm_local_os_ops_descr,
+        OsOpsDescrs.sm_remote_os_ops_descr
+    ]
+
+    @pytest.fixture(
+        params=[descr.os_ops for descr in sm_os_ops_descrs],
+        ids=[descr.sign for descr in sm_os_ops_descrs]
+    )
+    def os_ops(self, request: pytest.FixtureRequest) -> OsOperations:
+        assert isinstance(request, pytest.FixtureRequest)
+        assert isinstance(request.param, OsOperations)
+        return request.param
+
+    def test_exec_command_success(self, os_ops: OsOperations):
+        """
+        Test exec_command for successful command execution.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        cmd = ["sh", "-c", "python3 --version"]
+
+        response = os_ops.exec_command(cmd)
+
+        assert b'Python 3.' in response
+
+    def test_exec_command_failure(self, os_ops: OsOperations):
+        """
+        Test exec_command for command execution failure.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        cmd = ["sh", "-c", "nonexistent_command"]
+
+        while True:
+            try:
+                os_ops.exec_command(cmd)
+            except ExecUtilException as e:
+                assert type(e.exit_code) == int  # noqa: E721
+                assert e.exit_code == 127
+
+                assert type(e.message) == str  # noqa: E721
+                assert type(e.error) == bytes  # noqa: E721
+
+                assert e.message.startswith("Utility exited with non-zero code (127). Error:")
+                assert "nonexistent_command" in e.message
+                assert "not found" in e.message
+                assert b"nonexistent_command" in e.error
+                assert b"not found" in e.error
+                break
+            raise Exception("We wait an exception!")
+
+    def test_exec_command_failure__expect_error(self, os_ops: OsOperations):
+        """
+        Test exec_command for command execution failure.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        cmd = ["sh", "-c", "nonexistent_command"]
+
+        exit_status, result, error = os_ops.exec_command(cmd, verbose=True, expect_error=True)
+
+        assert exit_status == 127
+        assert result == b''
+        assert type(error) == bytes  # noqa: E721
+        assert b"nonexistent_command" in error
+        assert b"not found" in error
+
+    def test_is_executable_true(self, os_ops: OsOperations):
+        """
+        Test is_executable for an existing executable.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        response = os_ops.is_executable("/bin/sh")
+
+        assert response is True
+
+    def test_is_executable_false(self, os_ops: OsOperations):
+        """
+        Test is_executable for a non-executable.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        response = os_ops.is_executable(__file__)
+
+        assert response is False
+
+    def test_makedirs_and_rmdirs_success(self, os_ops: OsOperations):
+        """
+        Test makedirs and rmdirs for successful directory creation and removal.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        cmd = "pwd"
+        pwd = os_ops.exec_command(cmd, wait_exit=True, encoding='utf-8').strip()
+
+        path = "{}/test_dir".format(pwd)
+
+        # Test makedirs
+        os_ops.makedirs(path)
+        assert os.path.exists(path)
+        assert os_ops.path_exists(path)
+
+        # Test rmdirs
+        os_ops.rmdirs(path)
+        assert not os.path.exists(path)
+        assert not os_ops.path_exists(path)
+
+    def test_makedirs_failure(self, os_ops: OsOperations):
+        """
+        Test makedirs for failure.
+        """
+        # Try to create a directory in a read-only location
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        path = "/root/test_dir"
+
+        # Test makedirs
+        with pytest.raises(Exception):
+            os_ops.makedirs(path)
+
+    def test_listdir(self, os_ops: OsOperations):
+        """
+        Test listdir for listing directory contents.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        path = "/etc"
+        files = os_ops.listdir(path)
+        assert isinstance(files, list)
+        for f in files:
+            assert f is not None
+            assert type(f) == str  # noqa: E721
+
+    def test_path_exists_true__directory(self, os_ops: OsOperations):
+        """
+        Test path_exists for an existing directory.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        assert os_ops.path_exists("/etc") is True
+
+    def test_path_exists_true__file(self, os_ops: OsOperations):
+        """
+        Test path_exists for an existing file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        assert os_ops.path_exists(__file__) is True
+
+    def test_path_exists_false__directory(self, os_ops: OsOperations):
+        """
+        Test path_exists for a non-existing directory.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        assert os_ops.path_exists("/nonexistent_path") is False
+
+    def test_path_exists_false__file(self, os_ops: OsOperations):
+        """
+        Test path_exists for a non-existing file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        assert os_ops.path_exists("/etc/nonexistent_path.txt") is False
+
+    def test_mkdtemp__default(self, os_ops: OsOperations):
+        assert isinstance(os_ops, OsOperations)
+
+        path = os_ops.mkdtemp()
+        logging.info("Path is [{0}].".format(path))
+        assert os.path.exists(path)
+        os.rmdir(path)
+        assert not os.path.exists(path)
+
+    def test_mkdtemp__custom(self, os_ops: OsOperations):
+        assert isinstance(os_ops, OsOperations)
+
+        C_TEMPLATE = "abcdef"
+        path = os_ops.mkdtemp(C_TEMPLATE)
+        logging.info("Path is [{0}].".format(path))
+        assert os.path.exists(path)
+        assert C_TEMPLATE in os.path.basename(path)
+        os.rmdir(path)
+        assert not os.path.exists(path)
+
+    def test_rmdirs(self, os_ops: OsOperations):
+        assert isinstance(os_ops, OsOperations)
+
+        path = os_ops.mkdtemp()
+        assert os.path.exists(path)
+
+        assert os_ops.rmdirs(path, ignore_errors=False) is True
+        assert not os.path.exists(path)
+
+    def test_rmdirs__01_with_subfolder(self, os_ops: OsOperations):
+        assert isinstance(os_ops, OsOperations)
+
+        # folder with subfolder
+        path = os_ops.mkdtemp()
+        assert os.path.exists(path)
+
+        dir1 = os.path.join(path, "dir1")
+        assert not os.path.exists(dir1)
+
+        os_ops.makedirs(dir1)
+        assert os.path.exists(dir1)
+
+        assert os_ops.rmdirs(path, ignore_errors=False) is True
+        assert not os.path.exists(path)
+        assert not os.path.exists(dir1)
+
+    def test_rmdirs__02_with_file(self, os_ops: OsOperations):
+        assert isinstance(os_ops, OsOperations)
+
+        # folder with file
+        path = os_ops.mkdtemp()
+        assert os.path.exists(path)
+
+        file1 = os.path.join(path, "file1.txt")
+        assert not os.path.exists(file1)
+
+        os_ops.touch(file1)
+        assert os.path.exists(file1)
+
+        assert os_ops.rmdirs(path, ignore_errors=False) is True
+        assert not os.path.exists(path)
+        assert not os.path.exists(file1)
+
+    def test_rmdirs__03_with_subfolder_and_file(self, os_ops: OsOperations):
+        assert isinstance(os_ops, OsOperations)
+
+        # folder with subfolder and file
+        path = os_ops.mkdtemp()
+        assert os.path.exists(path)
+
+        dir1 = os.path.join(path, "dir1")
+        assert not os.path.exists(dir1)
+
+        os_ops.makedirs(dir1)
+        assert os.path.exists(dir1)
+
+        file1 = os.path.join(dir1, "file1.txt")
+        assert not os.path.exists(file1)
+
+        os_ops.touch(file1)
+        assert os.path.exists(file1)
+
+        assert os_ops.rmdirs(path, ignore_errors=False) is True
+        assert not os.path.exists(path)
+        assert not os.path.exists(dir1)
+        assert not os.path.exists(file1)
+
+    def test_write_text_file(self, os_ops: OsOperations):
+        """
+        Test write for writing data to a text file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        filename = os_ops.mkstemp()
+        data = "Hello, world!"
+
+        os_ops.write(filename, data, truncate=True)
+        os_ops.write(filename, data)
+
+        response = os_ops.read(filename)
+
+        assert response == data + data
+
+        os_ops.remove_file(filename)
+
+    def test_write_binary_file(self, os_ops: OsOperations):
+        """
+        Test write for writing data to a binary file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        filename = "/tmp/test_file.bin"
+        data = b"\x00\x01\x02\x03"
+
+        os_ops.write(filename, data, binary=True, truncate=True)
+
+        response = os_ops.read(filename, binary=True)
+
+        assert response == data
+
+    def test_read_text_file(self, os_ops: OsOperations):
+        """
+        Test read for reading data from a text file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        filename = "/etc/hosts"
+
+        response = os_ops.read(filename)
+
+        assert isinstance(response, str)
+
+    def test_read_binary_file(self, os_ops: OsOperations):
+        """
+        Test read for reading data from a binary file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        RunConditions.skip_if_windows()
+
+        filename = "/usr/bin/python3"
+
+        response = os_ops.read(filename, binary=True)
+
+        assert isinstance(response, bytes)
+
+    def test_read__text(self, os_ops: OsOperations):
+        """
+        Test OsOperations::read for text data.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        filename = __file__  # current file
+
+        with open(filename, 'r') as file:  # open in a text mode
+            response0 = file.read()
+
+        assert type(response0) == str  # noqa: E721
+
+        response1 = os_ops.read(filename)
+        assert type(response1) == str  # noqa: E721
+        assert response1 == response0
+
+        response2 = os_ops.read(filename, encoding=None, binary=False)
+        assert type(response2) == str  # noqa: E721
+        assert response2 == response0
+
+        response3 = os_ops.read(filename, encoding="")
+        assert type(response3) == str  # noqa: E721
+        assert response3 == response0
+
+        response4 = os_ops.read(filename, encoding="UTF-8")
+        assert type(response4) == str  # noqa: E721
+        assert response4 == response0
+
+    def test_read__binary(self, os_ops: OsOperations):
+        """
+        Test OsOperations::read for binary data.
+        """
+        filename = __file__  # current file
+
+        with open(filename, 'rb') as file:  # open in a binary mode
+            response0 = file.read()
+
+        assert type(response0) == bytes  # noqa: E721
+
+        response1 = os_ops.read(filename, binary=True)
+        assert type(response1) == bytes  # noqa: E721
+        assert response1 == response0
+
+    def test_read__binary_and_encoding(self, os_ops: OsOperations):
+        """
+        Test OsOperations::read for binary data and encoding.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        filename = __file__  # current file
+
+        with pytest.raises(
+                InvalidOperationException,
+                match=re.escape("Enconding is not allowed for read binary operation")):
+            os_ops.read(filename, encoding="", binary=True)
+
+    def test_read_binary__spec(self, os_ops: OsOperations):
+        """
+        Test OsOperations::read_binary.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        filename = __file__  # currnt file
+
+        with open(filename, 'rb') as file:  # open in a binary mode
+            response0 = file.read()
+
+        assert type(response0) == bytes  # noqa: E721
+
+        response1 = os_ops.read_binary(filename, 0)
+        assert type(response1) == bytes  # noqa: E721
+        assert response1 == response0
+
+        response2 = os_ops.read_binary(filename, 1)
+        assert type(response2) == bytes  # noqa: E721
+        assert len(response2) < len(response1)
+        assert len(response2) + 1 == len(response1)
+        assert response2 == response1[1:]
+
+        response3 = os_ops.read_binary(filename, len(response1))
+        assert type(response3) == bytes  # noqa: E721
+        assert len(response3) == 0
+
+        response4 = os_ops.read_binary(filename, len(response2))
+        assert type(response4) == bytes  # noqa: E721
+        assert len(response4) == 1
+        assert response4[0] == response1[len(response1) - 1]
+
+        response5 = os_ops.read_binary(filename, len(response1) + 1)
+        assert type(response5) == bytes  # noqa: E721
+        assert len(response5) == 0
+
+    def test_read_binary__spec__negative_offset(self, os_ops: OsOperations):
+        """
+        Test OsOperations::read_binary with negative offset.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        with pytest.raises(
+                ValueError,
+                match=re.escape("Negative 'offset' is not supported.")):
+            os_ops.read_binary(__file__, -1)
+
+    def test_get_file_size(self, os_ops: OsOperations):
+        """
+        Test OsOperations::get_file_size.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        filename = __file__  # current file
+
+        sz0 = os.path.getsize(filename)
+        assert type(sz0) == int  # noqa: E721
+
+        sz1 = os_ops.get_file_size(filename)
+        assert type(sz1) == int  # noqa: E721
+        assert sz1 == sz0
+
+    def test_isfile_true(self, os_ops: OsOperations):
+        """
+        Test isfile for an existing file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        filename = __file__
+
+        response = os_ops.isfile(filename)
+
+        assert response is True
+
+    def test_isfile_false__not_exist(self, os_ops: OsOperations):
+        """
+        Test isfile for a non-existing file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        filename = os.path.join(os.path.dirname(__file__), "nonexistent_file.txt")
+
+        response = os_ops.isfile(filename)
+
+        assert response is False
+
+    def test_isfile_false__directory(self, os_ops: OsOperations):
+        """
+        Test isfile for a firectory.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        name = os.path.dirname(__file__)
+
+        assert os_ops.isdir(name)
+
+        response = os_ops.isfile(name)
+
+        assert response is False
+
+    def test_isdir_true(self, os_ops: OsOperations):
+        """
+        Test isdir for an existing directory.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        name = os.path.dirname(__file__)
+
+        response = os_ops.isdir(name)
+
+        assert response is True
+
+    def test_isdir_false__not_exist(self, os_ops: OsOperations):
+        """
+        Test isdir for a non-existing directory.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        name = os.path.join(os.path.dirname(__file__), "it_is_nonexistent_directory")
+
+        response = os_ops.isdir(name)
+
+        assert response is False
+
+    def test_isdir_false__file(self, os_ops: OsOperations):
+        """
+        Test isdir for a file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        name = __file__
+
+        assert os_ops.isfile(name)
+
+        response = os_ops.isdir(name)
+
+        assert response is False
+
+    def test_cwd(self, os_ops: OsOperations):
+        """
+        Test cwd.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        v = os_ops.cwd()
+
+        assert v is not None
+        assert type(v) == str  # noqa: E721
+        assert v != ""
+
+    class tagWriteData001:
+        def __init__(self, sign, source, cp_rw, cp_truncate, cp_binary, cp_data, result):
+            self.sign = sign
+            self.source = source
+            self.call_param__rw = cp_rw
+            self.call_param__truncate = cp_truncate
+            self.call_param__binary = cp_binary
+            self.call_param__data = cp_data
+            self.result = result
+
+    sm_write_data001 = [
+        tagWriteData001("A001", "1234567890", False, False, False, "ABC", "1234567890ABC"),
+        tagWriteData001("A002", b"1234567890", False, False, True, b"ABC", b"1234567890ABC"),
+
+        tagWriteData001("B001", "1234567890", False, True, False, "ABC", "ABC"),
+        tagWriteData001("B002", "1234567890", False, True, False, "ABC1234567890", "ABC1234567890"),
+        tagWriteData001("B003", b"1234567890", False, True, True, b"ABC", b"ABC"),
+        tagWriteData001("B004", b"1234567890", False, True, True, b"ABC1234567890", b"ABC1234567890"),
+
+        tagWriteData001("C001", "1234567890", True, False, False, "ABC", "1234567890ABC"),
+        tagWriteData001("C002", b"1234567890", True, False, True, b"ABC", b"1234567890ABC"),
+
+        tagWriteData001("D001", "1234567890", True, True, False, "ABC", "ABC"),
+        tagWriteData001("D002", "1234567890", True, True, False, "ABC1234567890", "ABC1234567890"),
+        tagWriteData001("D003", b"1234567890", True, True, True, b"ABC", b"ABC"),
+        tagWriteData001("D004", b"1234567890", True, True, True, b"ABC1234567890", b"ABC1234567890"),
+
+        tagWriteData001("E001", "\0001234567890\000", False, False, False, "\000ABC\000", "\0001234567890\000\000ABC\000"),
+        tagWriteData001("E002", b"\0001234567890\000", False, False, True, b"\000ABC\000", b"\0001234567890\000\000ABC\000"),
+
+        tagWriteData001("F001", "a\nb\n", False, False, False, ["c", "d"], "a\nb\nc\nd\n"),
+        tagWriteData001("F002", b"a\nb\n", False, False, True, [b"c", b"d"], b"a\nb\nc\nd\n"),
+
+        tagWriteData001("G001", "a\nb\n", False, False, False, ["c\n\n", "d\n"], "a\nb\nc\nd\n"),
+        tagWriteData001("G002", b"a\nb\n", False, False, True, [b"c\n\n", b"d\n"], b"a\nb\nc\nd\n"),
+    ]
+
+    @pytest.fixture(
+        params=sm_write_data001,
+        ids=[x.sign for x in sm_write_data001],
+    )
+    def write_data001(self, request):
+        assert isinstance(request, pytest.FixtureRequest)
+        assert type(request.param) == __class__.tagWriteData001  # noqa: E721
+        return request.param
+
+    def test_write(self, write_data001: tagWriteData001, os_ops: OsOperations):
+        assert type(write_data001) == __class__.tagWriteData001  # noqa: E721
+        assert isinstance(os_ops, OsOperations)
+
+        mode = "w+b" if write_data001.call_param__binary else "w+"
+
+        with tempfile.NamedTemporaryFile(mode=mode, delete=True) as tmp_file:
+            tmp_file.write(write_data001.source)
+            tmp_file.flush()
+
+            os_ops.write(
+                tmp_file.name,
+                write_data001.call_param__data,
+                read_and_write=write_data001.call_param__rw,
+                truncate=write_data001.call_param__truncate,
+                binary=write_data001.call_param__binary)
+
+            tmp_file.seek(0)
+
+            s = tmp_file.read()
+
+            assert s == write_data001.result
+
+    def test_touch(self, os_ops: OsOperations):
+        """
+        Test touch for creating a new file or updating access and modification times of an existing file.
+        """
+        assert isinstance(os_ops, OsOperations)
+
+        filename = os_ops.mkstemp()
+
+        # TODO: this test does not check the result of 'touch' command!
+
+        os_ops.touch(filename)
+
+        assert os_ops.isfile(filename)
+
+        os_ops.remove_file(filename)
diff --git a/tests/test_remote.py b/tests/test_remote.py
index 2c37e2c1..565b2d20 100755
--- a/tests/test_remote.py
+++ b/tests/test_remote.py
@@ -2,16 +2,10 @@
 import os
 
 import pytest
-import re
-import tempfile
-import logging
 
 from ..testgres import ExecUtilException
-from ..testgres import InvalidOperationException
 from ..testgres import RemoteOperations
-from ..testgres import LocalOperations
 from ..testgres import ConnectionParams
-from ..testgres import utils as testgres_utils
 
 
 class TestRemoteOperations:
@@ -23,179 +17,6 @@ def setup(self):
                                        ssh_key=os.getenv('RDBMS_TESTPOOL_SSHKEY'))
         self.operations = RemoteOperations(conn_params)
 
-    def test_exec_command_success(self):
-        """
-        Test exec_command for successful command execution.
-        """
-        cmd = "python3 --version"
-        response = self.operations.exec_command(cmd, wait_exit=True)
-
-        assert b'Python 3.' in response
-
-    def test_exec_command_failure(self):
-        """
-        Test exec_command for command execution failure.
-        """
-        cmd = "nonexistent_command"
-        while True:
-            try:
-                self.operations.exec_command(cmd, verbose=True, wait_exit=True)
-            except ExecUtilException as e:
-                assert type(e.exit_code) == int  # noqa: E721
-                assert e.exit_code == 127
-
-                assert type(e.message) == str  # noqa: E721
-                assert type(e.error) == bytes  # noqa: E721
-
-                assert e.message.startswith("Utility exited with non-zero code (127). Error:")
-                assert "nonexistent_command" in e.message
-                assert "not found" in e.message
-                assert b"nonexistent_command" in e.error
-                assert b"not found" in e.error
-                break
-            raise Exception("We wait an exception!")
-
-    def test_exec_command_failure__expect_error(self):
-        """
-        Test exec_command for command execution failure.
-        """
-        cmd = "nonexistent_command"
-
-        exit_status, result, error = self.operations.exec_command(cmd, verbose=True, wait_exit=True, shell=True, expect_error=True)
-
-        assert exit_status == 127
-        assert result == b''
-        assert type(error) == bytes  # noqa: E721
-        assert b"nonexistent_command" in error
-        assert b"not found" in error
-
-    def test_is_executable_true(self):
-        """
-        Test is_executable for an existing executable.
-        """
-        local_ops = LocalOperations()
-        cmd = testgres_utils.get_bin_path2(local_ops, "pg_config")
-        cmd = local_ops.exec_command([cmd, "--bindir"], encoding="utf-8")
-        cmd = cmd.rstrip()
-        cmd = os.path.join(cmd, "pg_config")
-        response = self.operations.is_executable(cmd)
-
-        assert response is True
-
-    def test_is_executable_false(self):
-        """
-        Test is_executable for a non-executable.
-        """
-        cmd = "python"
-        response = self.operations.is_executable(cmd)
-
-        assert response is False
-
-    def test_makedirs_and_rmdirs_success(self):
-        """
-        Test makedirs and rmdirs for successful directory creation and removal.
-        """
-        cmd = "pwd"
-        pwd = self.operations.exec_command(cmd, wait_exit=True, encoding='utf-8').strip()
-
-        path = "{}/test_dir".format(pwd)
-
-        # Test makedirs
-        self.operations.makedirs(path)
-        assert os.path.exists(path)
-        assert self.operations.path_exists(path)
-
-        # Test rmdirs
-        self.operations.rmdirs(path)
-        assert not os.path.exists(path)
-        assert not self.operations.path_exists(path)
-
-    def test_makedirs_failure(self):
-        """
-        Test makedirs for failure.
-        """
-        # Try to create a directory in a read-only location
-        path = "/root/test_dir"
-
-        # Test makedirs
-        with pytest.raises(Exception):
-            self.operations.makedirs(path)
-
-    def test_mkdtemp__default(self):
-        path = self.operations.mkdtemp()
-        logging.info("Path is [{0}].".format(path))
-        assert os.path.exists(path)
-        os.rmdir(path)
-        assert not os.path.exists(path)
-
-    def test_mkdtemp__custom(self):
-        C_TEMPLATE = "abcdef"
-        path = self.operations.mkdtemp(C_TEMPLATE)
-        logging.info("Path is [{0}].".format(path))
-        assert os.path.exists(path)
-        assert C_TEMPLATE in os.path.basename(path)
-        os.rmdir(path)
-        assert not os.path.exists(path)
-
-    def test_rmdirs(self):
-        path = self.operations.mkdtemp()
-        assert os.path.exists(path)
-
-        assert self.operations.rmdirs(path, ignore_errors=False) is True
-        assert not os.path.exists(path)
-
-    def test_rmdirs__01_with_subfolder(self):
-        # folder with subfolder
-        path = self.operations.mkdtemp()
-        assert os.path.exists(path)
-
-        dir1 = os.path.join(path, "dir1")
-        assert not os.path.exists(dir1)
-
-        self.operations.makedirs(dir1)
-        assert os.path.exists(dir1)
-
-        assert self.operations.rmdirs(path, ignore_errors=False) is True
-        assert not os.path.exists(path)
-        assert not os.path.exists(dir1)
-
-    def test_rmdirs__02_with_file(self):
-        # folder with file
-        path = self.operations.mkdtemp()
-        assert os.path.exists(path)
-
-        file1 = os.path.join(path, "file1.txt")
-        assert not os.path.exists(file1)
-
-        self.operations.touch(file1)
-        assert os.path.exists(file1)
-
-        assert self.operations.rmdirs(path, ignore_errors=False) is True
-        assert not os.path.exists(path)
-        assert not os.path.exists(file1)
-
-    def test_rmdirs__03_with_subfolder_and_file(self):
-        # folder with subfolder and file
-        path = self.operations.mkdtemp()
-        assert os.path.exists(path)
-
-        dir1 = os.path.join(path, "dir1")
-        assert not os.path.exists(dir1)
-
-        self.operations.makedirs(dir1)
-        assert os.path.exists(dir1)
-
-        file1 = os.path.join(dir1, "file1.txt")
-        assert not os.path.exists(file1)
-
-        self.operations.touch(file1)
-        assert os.path.exists(file1)
-
-        assert self.operations.rmdirs(path, ignore_errors=False) is True
-        assert not os.path.exists(path)
-        assert not os.path.exists(dir1)
-        assert not os.path.exists(file1)
-
     def test_rmdirs__try_to_delete_nonexist_path(self):
         path = "/root/test_dir"
 
@@ -216,141 +37,6 @@ def test_rmdirs__try_to_delete_file(self):
         assert type(x.value.exit_code) == int  # noqa: E721
         assert x.value.exit_code == 20
 
-    def test_listdir(self):
-        """
-        Test listdir for listing directory contents.
-        """
-        path = "/etc"
-        files = self.operations.listdir(path)
-        assert isinstance(files, list)
-        for f in files:
-            assert f is not None
-            assert type(f) == str  # noqa: E721
-
-    def test_path_exists_true__directory(self):
-        """
-        Test path_exists for an existing directory.
-        """
-        assert self.operations.path_exists("/etc") is True
-
-    def test_path_exists_true__file(self):
-        """
-        Test path_exists for an existing file.
-        """
-        assert self.operations.path_exists(__file__) is True
-
-    def test_path_exists_false__directory(self):
-        """
-        Test path_exists for a non-existing directory.
-        """
-        assert self.operations.path_exists("/nonexistent_path") is False
-
-    def test_path_exists_false__file(self):
-        """
-        Test path_exists for a non-existing file.
-        """
-        assert self.operations.path_exists("/etc/nonexistent_path.txt") is False
-
-    def test_write_text_file(self):
-        """
-        Test write for writing data to a text file.
-        """
-        filename = "/tmp/test_file.txt"
-        data = "Hello, world!"
-
-        self.operations.write(filename, data, truncate=True)
-        self.operations.write(filename, data)
-
-        response = self.operations.read(filename)
-
-        assert response == data + data
-
-    def test_write_binary_file(self):
-        """
-        Test write for writing data to a binary file.
-        """
-        filename = "/tmp/test_file.bin"
-        data = b"\x00\x01\x02\x03"
-
-        self.operations.write(filename, data, binary=True, truncate=True)
-
-        response = self.operations.read(filename, binary=True)
-
-        assert response == data
-
-    def test_read_text_file(self):
-        """
-        Test read for reading data from a text file.
-        """
-        filename = "/etc/hosts"
-
-        response = self.operations.read(filename)
-
-        assert isinstance(response, str)
-
-    def test_read_binary_file(self):
-        """
-        Test read for reading data from a binary file.
-        """
-        filename = "/usr/bin/python3"
-
-        response = self.operations.read(filename, binary=True)
-
-        assert isinstance(response, bytes)
-
-    def test_read__text(self):
-        """
-        Test RemoteOperations::read for text data.
-        """
-        filename = __file__  # current file
-
-        with open(filename, 'r') as file:  # open in a text mode
-            response0 = file.read()
-
-        assert type(response0) == str  # noqa: E721
-
-        response1 = self.operations.read(filename)
-        assert type(response1) == str  # noqa: E721
-        assert response1 == response0
-
-        response2 = self.operations.read(filename, encoding=None, binary=False)
-        assert type(response2) == str  # noqa: E721
-        assert response2 == response0
-
-        response3 = self.operations.read(filename, encoding="")
-        assert type(response3) == str  # noqa: E721
-        assert response3 == response0
-
-        response4 = self.operations.read(filename, encoding="UTF-8")
-        assert type(response4) == str  # noqa: E721
-        assert response4 == response0
-
-    def test_read__binary(self):
-        """
-        Test RemoteOperations::read for binary data.
-        """
-        filename = __file__  # current file
-
-        with open(filename, 'rb') as file:  # open in a binary mode
-            response0 = file.read()
-
-        assert type(response0) == bytes  # noqa: E721
-
-        response1 = self.operations.read(filename, binary=True)
-        assert type(response1) == bytes  # noqa: E721
-        assert response1 == response0
-
-    def test_read__binary_and_encoding(self):
-        """
-        Test RemoteOperations::read for binary data and encoding.
-        """
-        filename = __file__  # current file
-
-        with pytest.raises(
-                InvalidOperationException,
-                match=re.escape("Enconding is not allowed for read binary operation")):
-            self.operations.read(filename, encoding="", binary=True)
-
     def test_read__unknown_file(self):
         """
         Test RemoteOperations::read with unknown file.
@@ -363,40 +49,6 @@ def test_read__unknown_file(self):
         assert "No such file or directory" in str(x.value)
         assert "/dummy" in str(x.value)
 
-    def test_read_binary__spec(self):
-        """
-        Test RemoteOperations::read_binary.
-        """
-        filename = __file__  # currnt file
-
-        with open(filename, 'rb') as file:  # open in a binary mode
-            response0 = file.read()
-
-        assert type(response0) == bytes  # noqa: E721
-
-        response1 = self.operations.read_binary(filename, 0)
-        assert type(response1) == bytes  # noqa: E721
-        assert response1 == response0
-
-        response2 = self.operations.read_binary(filename, 1)
-        assert type(response2) == bytes  # noqa: E721
-        assert len(response2) < len(response1)
-        assert len(response2) + 1 == len(response1)
-        assert response2 == response1[1:]
-
-        response3 = self.operations.read_binary(filename, len(response1))
-        assert type(response3) == bytes  # noqa: E721
-        assert len(response3) == 0
-
-        response4 = self.operations.read_binary(filename, len(response2))
-        assert type(response4) == bytes  # noqa: E721
-        assert len(response4) == 1
-        assert response4[0] == response1[len(response1) - 1]
-
-        response5 = self.operations.read_binary(filename, len(response1) + 1)
-        assert type(response5) == bytes  # noqa: E721
-        assert len(response5) == 0
-
     def test_read_binary__spec__unk_file(self):
         """
         Test RemoteOperations::read_binary with unknown file.
@@ -409,29 +61,6 @@ def test_read_binary__spec__unk_file(self):
         assert "No such file or directory" in str(x.value)
         assert "/dummy" in str(x.value)
 
-    def test_read_binary__spec__negative_offset(self):
-        """
-        Test RemoteOperations::read_binary with negative offset.
-        """
-
-        with pytest.raises(
-                ValueError,
-                match=re.escape("Negative 'offset' is not supported.")):
-            self.operations.read_binary(__file__, -1)
-
-    def test_get_file_size(self):
-        """
-        Test RemoteOperations::get_file_size.
-        """
-        filename = __file__  # current file
-
-        sz0 = os.path.getsize(filename)
-        assert type(sz0) == int  # noqa: E721
-
-        sz1 = self.operations.get_file_size(filename)
-        assert type(sz1) == int  # noqa: E721
-        assert sz1 == sz0
-
     def test_get_file_size__unk_file(self):
         """
         Test RemoteOperations::get_file_size.
@@ -443,155 +72,3 @@ def test_get_file_size__unk_file(self):
         assert "Utility exited with non-zero code (1)." in str(x.value)
         assert "No such file or directory" in str(x.value)
         assert "/dummy" in str(x.value)
-
-    def test_touch(self):
-        """
-        Test touch for creating a new file or updating access and modification times of an existing file.
-        """
-        filename = "/tmp/test_file.txt"
-
-        self.operations.touch(filename)
-
-        assert self.operations.isfile(filename)
-
-    def test_isfile_true(self):
-        """
-        Test isfile for an existing file.
-        """
-        filename = __file__
-
-        response = self.operations.isfile(filename)
-
-        assert response is True
-
-    def test_isfile_false__not_exist(self):
-        """
-        Test isfile for a non-existing file.
-        """
-        filename = os.path.join(os.path.dirname(__file__), "nonexistent_file.txt")
-
-        response = self.operations.isfile(filename)
-
-        assert response is False
-
-    def test_isfile_false__directory(self):
-        """
-        Test isfile for a firectory.
-        """
-        name = os.path.dirname(__file__)
-
-        assert self.operations.isdir(name)
-
-        response = self.operations.isfile(name)
-
-        assert response is False
-
-    def test_isdir_true(self):
-        """
-        Test isdir for an existing directory.
-        """
-        name = os.path.dirname(__file__)
-
-        response = self.operations.isdir(name)
-
-        assert response is True
-
-    def test_isdir_false__not_exist(self):
-        """
-        Test isdir for a non-existing directory.
-        """
-        name = os.path.join(os.path.dirname(__file__), "it_is_nonexistent_directory")
-
-        response = self.operations.isdir(name)
-
-        assert response is False
-
-    def test_isdir_false__file(self):
-        """
-        Test isdir for a file.
-        """
-        name = __file__
-
-        assert self.operations.isfile(name)
-
-        response = self.operations.isdir(name)
-
-        assert response is False
-
-    def test_cwd(self):
-        """
-        Test cwd.
-        """
-        v = self.operations.cwd()
-
-        assert v is not None
-        assert type(v) == str  # noqa: E721
-        assert v != ""
-
-    class tagWriteData001:
-        def __init__(self, sign, source, cp_rw, cp_truncate, cp_binary, cp_data, result):
-            self.sign = sign
-            self.source = source
-            self.call_param__rw = cp_rw
-            self.call_param__truncate = cp_truncate
-            self.call_param__binary = cp_binary
-            self.call_param__data = cp_data
-            self.result = result
-
-    sm_write_data001 = [
-        tagWriteData001("A001", "1234567890", False, False, False, "ABC", "1234567890ABC"),
-        tagWriteData001("A002", b"1234567890", False, False, True, b"ABC", b"1234567890ABC"),
-
-        tagWriteData001("B001", "1234567890", False, True, False, "ABC", "ABC"),
-        tagWriteData001("B002", "1234567890", False, True, False, "ABC1234567890", "ABC1234567890"),
-        tagWriteData001("B003", b"1234567890", False, True, True, b"ABC", b"ABC"),
-        tagWriteData001("B004", b"1234567890", False, True, True, b"ABC1234567890", b"ABC1234567890"),
-
-        tagWriteData001("C001", "1234567890", True, False, False, "ABC", "1234567890ABC"),
-        tagWriteData001("C002", b"1234567890", True, False, True, b"ABC", b"1234567890ABC"),
-
-        tagWriteData001("D001", "1234567890", True, True, False, "ABC", "ABC"),
-        tagWriteData001("D002", "1234567890", True, True, False, "ABC1234567890", "ABC1234567890"),
-        tagWriteData001("D003", b"1234567890", True, True, True, b"ABC", b"ABC"),
-        tagWriteData001("D004", b"1234567890", True, True, True, b"ABC1234567890", b"ABC1234567890"),
-
-        tagWriteData001("E001", "\0001234567890\000", False, False, False, "\000ABC\000", "\0001234567890\000\000ABC\000"),
-        tagWriteData001("E002", b"\0001234567890\000", False, False, True, b"\000ABC\000", b"\0001234567890\000\000ABC\000"),
-
-        tagWriteData001("F001", "a\nb\n", False, False, False, ["c", "d"], "a\nb\nc\nd\n"),
-        tagWriteData001("F002", b"a\nb\n", False, False, True, [b"c", b"d"], b"a\nb\nc\nd\n"),
-
-        tagWriteData001("G001", "a\nb\n", False, False, False, ["c\n\n", "d\n"], "a\nb\nc\nd\n"),
-        tagWriteData001("G002", b"a\nb\n", False, False, True, [b"c\n\n", b"d\n"], b"a\nb\nc\nd\n"),
-    ]
-
-    @pytest.fixture(
-        params=sm_write_data001,
-        ids=[x.sign for x in sm_write_data001],
-    )
-    def write_data001(self, request):
-        assert isinstance(request, pytest.FixtureRequest)
-        assert type(request.param) == __class__.tagWriteData001  # noqa: E721
-        return request.param
-
-    def test_write(self, write_data001):
-        assert type(write_data001) == __class__.tagWriteData001  # noqa: E721
-
-        mode = "w+b" if write_data001.call_param__binary else "w+"
-
-        with tempfile.NamedTemporaryFile(mode=mode, delete=True) as tmp_file:
-            tmp_file.write(write_data001.source)
-            tmp_file.flush()
-
-            self.operations.write(
-                tmp_file.name,
-                write_data001.call_param__data,
-                read_and_write=write_data001.call_param__rw,
-                truncate=write_data001.call_param__truncate,
-                binary=write_data001.call_param__binary)
-
-            tmp_file.seek(0)
-
-            s = tmp_file.read()
-
-            assert s == write_data001.result