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authorLars Wirzenius <liw@liw.fi>2017-03-28 17:27:16 +0300
committerLars Wirzenius <liw@liw.fi>2017-03-28 17:28:42 +0300
commit64efe5712156c98feb7372915a0d90bb639eee6a (patch)
treedccad9c0ee43acdf6ef4c91dac4e0d6a55d9cfa1
parentc43edc4a8ec13e6ecfc503916c608440af819f82 (diff)
downloadcmdtest-64efe5712156c98feb7372915a0d90bb639eee6a.tar.gz
Implement implicitly persistent variable storage
-rw-r--r--fail-tests/fail.stdout-diff2
-rw-r--r--yarnutils/__init__.py1
-rw-r--r--yarnutils/vars.py47
-rw-r--r--yarnutils/vars_tests.py43
4 files changed, 92 insertions, 1 deletions
diff --git a/fail-tests/fail.stdout-diff b/fail-tests/fail.stdout-diff
index c574866..b4fe31a 100644
--- a/fail-tests/fail.stdout-diff
+++ b/fail-tests/fail.stdout-diff
@@ -1,4 +1,4 @@
--- /dev/null 2017-03-27 15:43:35.669436670 +0300
-+++ fail-tests/fail.stdout-actual 2017-03-28 17:16:53.366886919 +0300
++++ fail-tests/fail.stdout-actual 2017-03-28 17:27:11.462899536 +0300
@@ -0,0 +1 @@
+this is not empty output to make test fail
diff --git a/yarnutils/__init__.py b/yarnutils/__init__.py
index 9c3ef7c..0a5e0c4 100644
--- a/yarnutils/__init__.py
+++ b/yarnutils/__init__.py
@@ -16,3 +16,4 @@
# =*= License: GPL-3+ =*=
+from .vars import Variables
diff --git a/yarnutils/vars.py b/yarnutils/vars.py
new file mode 100644
index 0000000..9404ffa
--- /dev/null
+++ b/yarnutils/vars.py
@@ -0,0 +1,47 @@
+# Copyright 2017 Lars Wirzenius
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+#
+# =*= License: GPL-3+ =*=
+
+
+import os
+import yaml
+
+
+class Variables(object):
+
+ _basename = 'vars.yaml'
+
+ def __init__(self, dirname):
+ self._filename = os.path.join(dirname, self._basename)
+ self._dict = self._load()
+
+ def _load(self):
+ if os.path.exists(self._filename):
+ with open(self._filename) as f:
+ return yaml.safe_load(f)
+ else:
+ return {}
+
+ def _save(self, values):
+ with open(self._filename, 'w') as f:
+ return yaml.safe_dump(values, stream=f)
+
+ def __getitem__(self, key):
+ return self._dict.get(key)
+
+ def __setitem__(self, key, value):
+ self._dict[key] = value
+ self._save(self._dict)
diff --git a/yarnutils/vars_tests.py b/yarnutils/vars_tests.py
new file mode 100644
index 0000000..a49903e
--- /dev/null
+++ b/yarnutils/vars_tests.py
@@ -0,0 +1,43 @@
+# Copyright 2017 Lars Wirzenius
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+#
+# =*= License: GPL-3+ =*=
+
+
+import shutil
+import tempfile
+import unittest
+
+import yarnutils
+
+
+class VariablesTests(unittest.TestCase):
+
+ def setUp(self):
+ self.tempdir = tempfile.mkdtemp()
+
+ def tearDown(self):
+ shutil.rmtree(self.tempdir)
+
+ def test_unset_variable_is_None(self):
+ vars = yarnutils.Variables(self.tempdir)
+ self.assertEqual(vars['foo'], None)
+
+ def test_set_value_is_persistent(self):
+ vars1 = yarnutils.Variables(self.tempdir)
+ vars1['foo'] = 'bar'
+ vars2 = yarnutils.Variables(self.tempdir)
+ self.assertEqual(vars1['foo'], vars2['foo'])
+ self.assertEqual(vars2['foo'], 'bar')