Drop reliance on dmidecode executable.

2 files changed, 54 insertions, 40 deletions

diff --git a/tests/unittests/test_datasource/test_altcloud.py b/tests/unittests/test_datasource/test_altcloud.py
index eaaa90e6..1a48ee5f 100644
--- a/tests/unittests/test_datasource/test_altcloud.py
+++ b/tests/unittests/test_datasource/test_altcloud.py
@@ -26,6 +26,7 @@ import shutil
 import tempfile
 
 from cloudinit import helpers
+from cloudinit import util
 from unittest import TestCase
 
 # Get the cloudinit.sources.DataSourceAltCloud import items needed.
@@ -98,6 +99,16 @@ def _remove_user_data_files(mount_dir,
             pass
 
 
+def _dmi_data(expected):
+    '''
+    Spoof the data received over DMI
+    '''
+    def _data(key):
+        return expected
+
+    return _data
+
+
 class TestGetCloudType(TestCase):
     '''
     Test to exercise method: DataSourceAltCloud.get_cloud_type()
@@ -106,24 +117,22 @@ class TestGetCloudType(TestCase):
     def setUp(self):
         '''Set up.'''
         self.paths = helpers.Paths({'cloud_dir': '/tmp'})
+        self.dmi_data = util.read_dmi_data
         # We have a different code path for arm to deal with LP1243287
         # We have to switch arch to x86_64 to avoid test failure
         force_arch('x86_64')
 
     def tearDown(self):
         # Reset
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['dmidecode', '--string', 'system-product-name']
-        # Return back to original arch
+        util.read_dmi_data = self.dmi_data
         force_arch()
 
     def test_rhev(self):
         '''
         Test method get_cloud_type() for RHEVm systems.
-        Forcing dmidecode return to match a RHEVm system: RHEV Hypervisor
+        Forcing read_dmi_data return to match a RHEVm system: RHEV Hypervisor
         '''
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['echo', 'RHEV Hypervisor']
+        util.read_dmi_data = _dmi_data('RHEV')
         dsrc = DataSourceAltCloud({}, None, self.paths)
         self.assertEquals('RHEV', \
             dsrc.get_cloud_type())
@@ -131,10 +140,9 @@ class TestGetCloudType(TestCase):
     def test_vsphere(self):
         '''
         Test method get_cloud_type() for vSphere systems.
-        Forcing dmidecode return to match a vSphere system: RHEV Hypervisor
+        Forcing read_dmi_data return to match a vSphere system: RHEV Hypervisor
         '''
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['echo', 'VMware Virtual Platform']
+        util.read_dmi_data = _dmi_data('VMware Virtual Platform')
         dsrc = DataSourceAltCloud({}, None, self.paths)
         self.assertEquals('VSPHERE', \
             dsrc.get_cloud_type())
@@ -142,30 +150,9 @@ class TestGetCloudType(TestCase):
     def test_unknown(self):
         '''
         Test method get_cloud_type() for unknown systems.
-        Forcing dmidecode return to match an unrecognized return.
-        '''
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['echo', 'Unrecognized Platform']
-        dsrc = DataSourceAltCloud({}, None, self.paths)
-        self.assertEquals('UNKNOWN', \
-            dsrc.get_cloud_type())
-
-    def test_exception1(self):
-        '''
-        Test method get_cloud_type() where command dmidecode fails.
-        '''
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['ls', 'bad command']
-        dsrc = DataSourceAltCloud({}, None, self.paths)
-        self.assertEquals('UNKNOWN', \
-            dsrc.get_cloud_type())
-
-    def test_exception2(self):
-        '''
-        Test method get_cloud_type() where command dmidecode is not available.
+        Forcing read_dmi_data return to match an unrecognized return.
         '''
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['bad command']
+        util.read_dmi_data = _dmi_data('Unrecognized Platform')
         dsrc = DataSourceAltCloud({}, None, self.paths)
         self.assertEquals('UNKNOWN', \
             dsrc.get_cloud_type())
@@ -180,6 +167,7 @@ class TestGetDataCloudInfoFile(TestCase):
         '''Set up.'''
         self.paths = helpers.Paths({'cloud_dir': '/tmp'})
         self.cloud_info_file = tempfile.mkstemp()[1]
+        self.dmi_data = util.read_dmi_data
         cloudinit.sources.DataSourceAltCloud.CLOUD_INFO_FILE = \
             self.cloud_info_file
 
@@ -192,6 +180,7 @@ class TestGetDataCloudInfoFile(TestCase):
         except OSError:
             pass
 
+        util.read_dmi_data = self.dmi_data
         cloudinit.sources.DataSourceAltCloud.CLOUD_INFO_FILE = \
             '/etc/sysconfig/cloud-info'
 
@@ -243,6 +232,7 @@ class TestGetDataNoCloudInfoFile(TestCase):
     def setUp(self):
         '''Set up.'''
         self.paths = helpers.Paths({'cloud_dir': '/tmp'})
+        self.dmi_data = util.read_dmi_data
         cloudinit.sources.DataSourceAltCloud.CLOUD_INFO_FILE = \
             'no such file'
         # We have a different code path for arm to deal with LP1243287
@@ -253,16 +243,14 @@ class TestGetDataNoCloudInfoFile(TestCase):
         # Reset
         cloudinit.sources.DataSourceAltCloud.CLOUD_INFO_FILE = \
             '/etc/sysconfig/cloud-info'
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['dmidecode', '--string', 'system-product-name']
+        util.read_dmi_data = self.dmi_data
         # Return back to original arch
         force_arch()
 
     def test_rhev_no_cloud_file(self):
         '''Test No cloud info file module get_data() forcing RHEV.'''
 
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['echo', 'RHEV Hypervisor']
+        util.read_dmi_data = _dmi_data('RHEV Hypervisor')
         dsrc = DataSourceAltCloud({}, None, self.paths)
         dsrc.user_data_rhevm = lambda: True
         self.assertEquals(True, dsrc.get_data())
@@ -270,8 +258,7 @@ class TestGetDataNoCloudInfoFile(TestCase):
     def test_vsphere_no_cloud_file(self):
         '''Test No cloud info file module get_data() forcing VSPHERE.'''
 
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['echo', 'VMware Virtual Platform']
+        util.read_dmi_data = _dmi_data('VMware Virtual Platform')
         dsrc = DataSourceAltCloud({}, None, self.paths)
         dsrc.user_data_vsphere = lambda: True
         self.assertEquals(True, dsrc.get_data())
@@ -279,8 +266,7 @@ class TestGetDataNoCloudInfoFile(TestCase):
     def test_failure_no_cloud_file(self):
         '''Test No cloud info file module get_data() forcing unrecognized.'''
 
-        cloudinit.sources.DataSourceAltCloud.CMD_DMI_SYSTEM = \
-            ['echo', 'Unrecognized Platform']
+        util.read_dmi_data = _dmi_data('Unrecognized Platform')
         dsrc = DataSourceAltCloud({}, None, self.paths)
         self.assertEquals(False, dsrc.get_data())
 
diff --git a/tests/unittests/test_util.py b/tests/unittests/test_util.py
index 35e92445..6ae41bd6 100644
--- a/tests/unittests/test_util.py
+++ b/tests/unittests/test_util.py
@@ -310,4 +310,32 @@ class TestMountinfoParsing(helpers.ResourceUsingTestCase):
         expected = ('none', 'tmpfs', '/run/lock')
         self.assertEqual(expected, util.parse_mount_info('/run/lock', lines))
 
+
+class TestReadDMIData(helpers.FilesystemMockingTestCase):
+
+    def _patchIn(self, root):
+        self.restore()
+        self.patchOS(root)
+        self.patchUtils(root)
+
+    def _write_key(self, key, content):
+        new_root = self.makeDir()
+        self._patchIn(new_root)
+        util.ensure_dir(os.path.join('sys', 'class', 'dmi', 'id'))
+
+        dmi_key = "/sys/class/dmi/id/{}".format(key)
+        util.write_file(dmi_key, content)
+
+    def test_key(self):
+        key_content = "TEST-KEY-DATA"
+        self._write_key("key", key_content)
+        self.assertEquals(key_content, util.read_dmi_data("key"))
+
+    def test_key_mismatch(self):
+        self._write_key("test", "ABC")
+        self.assertNotEqual("123",  util.read_dmi_data("test"))
+
+    def test_no_key(self):
+        self.assertFalse(util.read_dmi_data("key"))
+
 # vi: ts=4 expandtab