From 2e0abe6d12aa2657a4febed3a80b8c4cf104487a Mon Sep 17 00:00:00 2001
From: Bo Maryniuk <bo@suse.de>
Date: Wed, 14 Nov 2018 17:36:23 +0100
Subject: [PATCH] Get os_arch also without RPM package installed

backport pkg.rpm test

Add pkg.rpm unit test case

Fix docstring

Add UT for getting OS architecture fallback, when no RPM found (initrd, e.g.)

Add UT for OS architecture detection on fallback, when no CPU arch can be determined

Add UT for OS arch detection when no CPU arch or machine can be determined

Remove unsupported testcase
---
 salt/utils/pkg/rpm.py        | 18 ++++++---
 tests/unit/utils/test_pkg.py | 72 ++++++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+), 6 deletions(-)
 create mode 100644 tests/unit/utils/test_pkg.py

diff --git a/salt/utils/pkg/rpm.py b/salt/utils/pkg/rpm.py
index 94e231da4b..bb8c3fb589 100644
--- a/salt/utils/pkg/rpm.py
+++ b/salt/utils/pkg/rpm.py
@@ -9,7 +9,9 @@ import collections
 import datetime
 import logging
 import subprocess
+import platform
 import salt.utils.stringutils
+import salt.utils.path
 
 # Import 3rd-party libs
 from salt.ext import six
@@ -42,12 +44,16 @@ def get_osarch():
     '''
     Get the os architecture using rpm --eval
     '''
-    ret = subprocess.Popen(
-        'rpm --eval "%{_host_cpu}"',
-        shell=True,
-        close_fds=True,
-        stdout=subprocess.PIPE,
-        stderr=subprocess.PIPE).communicate()[0]
+    if salt.utils.path.which('rpm'):
+        ret = subprocess.Popen(
+            'rpm --eval "%{_host_cpu}"',
+            shell=True,
+            close_fds=True,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE).communicate()[0]
+    else:
+        ret = ''.join(list(filter(None, platform.uname()[-2:]))[-1:])
+
     return salt.utils.stringutils.to_str(ret).strip() or 'unknown'
 
 
diff --git a/tests/unit/utils/test_pkg.py b/tests/unit/utils/test_pkg.py
new file mode 100644
index 0000000000..361e0bf92f
--- /dev/null
+++ b/tests/unit/utils/test_pkg.py
@@ -0,0 +1,72 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import absolute_import, unicode_literals, print_function
+
+from tests.support.unit import TestCase, skipIf
+from tests.support.mock import Mock, MagicMock, patch, NO_MOCK, NO_MOCK_REASON
+import salt.utils.pkg
+from salt.utils.pkg import rpm
+
+try:
+    import pytest
+except ImportError:
+    pytest = None
+
+
+@skipIf(NO_MOCK, NO_MOCK_REASON)
+@skipIf(pytest is None, 'PyTest is missing')
+class PkgRPMTestCase(TestCase):
+    '''
+    Test case for pkg.rpm utils
+    '''
+
+    @patch('salt.utils.path.which', MagicMock(return_value=True))
+    def test_get_osarch_by_rpm(self):
+        '''
+        Get os_arch if RPM package is installed.
+        :return:
+        '''
+        subprocess_mock = MagicMock()
+        subprocess_mock.Popen = MagicMock()
+        subprocess_mock.Popen().communicate = MagicMock(return_value=['Z80'])
+        with patch('salt.utils.pkg.rpm.subprocess', subprocess_mock):
+            assert rpm.get_osarch() == 'Z80'
+        assert subprocess_mock.Popen.call_count == 2  # One within the mock
+        assert subprocess_mock.Popen.call_args[1]['close_fds']
+        assert subprocess_mock.Popen.call_args[1]['shell']
+        assert len(subprocess_mock.Popen.call_args_list) == 2
+        assert subprocess_mock.Popen.call_args[0][0] == 'rpm --eval "%{_host_cpu}"'
+
+    @patch('salt.utils.path.which', MagicMock(return_value=False))
+    @patch('salt.utils.pkg.rpm.subprocess', MagicMock(return_value=False))
+    @patch('salt.utils.pkg.rpm.platform.uname', MagicMock(
+        return_value=('Sinclair BASIC', 'motophone', '1982 Sinclair Research Ltd', '1.0', 'ZX81', 'Z80')))
+    def test_get_osarch_by_platform(self):
+        '''
+        Get os_arch if RPM package is not installed (inird image, for example).
+        :return:
+        '''
+        assert rpm.get_osarch() == 'Z80'
+
+    @patch('salt.utils.path.which', MagicMock(return_value=False))
+    @patch('salt.utils.pkg.rpm.subprocess', MagicMock(return_value=False))
+    @patch('salt.utils.pkg.rpm.platform.uname', MagicMock(
+        return_value=('Sinclair BASIC', 'motophone', '1982 Sinclair Research Ltd', '1.0', 'ZX81', '')))
+    def test_get_osarch_by_platform_no_cpu_arch(self):
+        '''
+        Get os_arch if RPM package is not installed (inird image, for example) but cpu arch cannot be determined.
+        :return:
+        '''
+        assert rpm.get_osarch() == 'ZX81'
+
+    @patch('salt.utils.path.which', MagicMock(return_value=False))
+    @patch('salt.utils.pkg.rpm.subprocess', MagicMock(return_value=False))
+    @patch('salt.utils.pkg.rpm.platform.uname', MagicMock(
+        return_value=('Sinclair BASIC', 'motophone', '1982 Sinclair Research Ltd', '1.0', '', '')))
+    def test_get_osarch_by_platform_no_cpu_arch_no_machine(self):
+        '''
+        Get os_arch if RPM package is not installed (inird image, for example)
+        where both cpu arch and machine cannot be determined.
+        :return:
+        '''
+        assert rpm.get_osarch() == 'unknown'
-- 
2.19.1