From 6a96d7a3fd958bd95abcce92173e34f2e5491e8c Mon Sep 17 00:00:00 2001
From: The MMGen Project <mmgen@tuta.io>
Date: Wed, 17 May 2023 15:44:11 +0000
Subject: [PATCH] new module: pyversion.py; add test

---
 mmgen/pyversion.py           | 54 +++++++++++++++++++++++++++++
 test/unit_tests_d/ut_misc.py | 67 ++++++++++++++++++++++++++++++++++++
 2 files changed, 121 insertions(+)
 create mode 100755 mmgen/pyversion.py
 create mode 100755 test/unit_tests_d/ut_misc.py

diff --git a/mmgen/pyversion.py b/mmgen/pyversion.py
new file mode 100755
index 00000000..cfab1720
--- /dev/null
+++ b/mmgen/pyversion.py
@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+#
+# mmgen = Multi-Mode GENerator, a command-line cryptocurrency wallet
+# Copyright (C)2013-2023 The MMGen Project <mmgen@tuta.io>
+# Licensed under the GNU General Public License, Version 3:
+#   https://www.gnu.org/licenses
+# Public project repositories:
+#   https://github.com/mmgen/mmgen
+#   https://gitlab.com/mmgen/mmgen
+
+"""
+pyversion: Python version string operations
+"""
+
+class PythonVersion(str):
+
+	def __new__(cls,arg=None):
+		if isinstance(arg,PythonVersion):
+			return arg
+		if arg:
+			major,minor = arg.split('.')
+		else:
+			import platform
+			major,minor = platform.python_version_tuple()[:2]
+		me = str.__new__( cls, f'{major}.{minor}' )
+		me.major = int(major)
+		me.minor = int(minor)
+		return me
+
+	def __lt__(self,other):
+		other = type(self)(other)
+		return self.major < other.major or (self.major == other.major and self.minor < other.minor)
+
+	def __le__(self,other):
+		other = type(self)(other)
+		return self.major < other.major or (self.major == other.major and self.minor <= other.minor)
+
+	def __eq__(self,other):
+		other = type(self)(other)
+		return self.major == other.major and self.minor == other.minor
+
+	def __ne__(self,other):
+		other = type(self)(other)
+		return not (self.major == other.major and self.minor == other.minor)
+
+	def __gt__(self,other):
+		other = type(self)(other)
+		return self.major > other.major or (self.major == other.major and self.minor > other.minor)
+
+	def __ge__(self,other):
+		other = type(self)(other)
+		return self.major > other.major or (self.major == other.major and self.minor >= other.minor)
+
+python_version = PythonVersion()
diff --git a/test/unit_tests_d/ut_misc.py b/test/unit_tests_d/ut_misc.py
new file mode 100755
index 00000000..ea499c1b
--- /dev/null
+++ b/test/unit_tests_d/ut_misc.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+
+"""
+test.unit_tests_d.ut_misc: miscellaneous unit tests for the MMGen suite
+"""
+
+class unit_tests:
+
+	def pyversion(self,name,ut):
+		from ..include.common import vmsg
+		from mmgen.pyversion import PythonVersion,python_version
+
+		ver = {}
+		fs = '{:<7} {:<9} {:<5} {}'
+		vmsg('\n' + fs.format('Version','PyVersion','Major','Minor'))
+
+		for k in ('current','3.3','3.12','4.3','7.0'):
+			obj = python_version if k == 'current' else PythonVersion(k)
+			major,minor = [int(s) for s in obj.split('.')]
+			assert obj.major == major and obj.minor == minor
+			vmsg(fs.format(k.upper(),obj,major,minor))
+			ver[k] = obj
+
+		vmsg('\nPerforming comparison tests:')
+
+		assert ver['3.3'] == '3.3'
+
+		assert ver['current'] < ver['7.0']
+		assert ver['3.3']     < ver['4.3']
+		assert ver['3.12']    < ver['7.0']
+		assert ver['3.3']     < ver['3.12']
+
+		assert ver['current'] < '7.0'
+		assert ver['3.3']     < '4.3'
+		assert ver['3.12']    < '7.0'
+		assert ver['3.3']     < '3.12'
+
+		assert ver['current'] <= ver['current']
+		assert ver['3.3']     <= '4.3'
+		assert ver['3.12']    <= '7.0'
+		assert ver['3.3']     <= '3.12'
+
+		assert ver['current'] == ver['current']
+		assert ver['3.3']     == ver['3.3']
+		assert ver['3.3']     != ver['3.12']
+		assert ver['3.3']     != ver['4.3']
+		assert ver['3.3']     == '3.3'
+		assert ver['3.3']     != '3.12'
+		assert ver['3.3']     != '4.3'
+
+		assert ver['current'] > '3.6'
+		assert ver['7.0']     > ver['current']
+		assert ver['4.3']     > '3.3'
+		assert ver['3.12']    > '3.3'
+
+		assert ver['current'] >= ver['current']
+		assert ver['7.0']     >= ver['current']
+		assert ver['4.3']     >= '3.3'
+		assert ver['3.12']    >= '3.12'
+		assert ver['3.12']    >= '3.3'
+
+		assert '3.0' < ver['3.12'] < '3.13'
+		assert '3.3' < ver['4.3']  <= '4.3'
+		assert '4.3' <= ver['4.3'] <= '4.3'
+		assert '4.3' == ver['4.3'] == '4.3'
+
+		return True