ceph-volume: tests: add configuration tests

Signed-off-by: Alfredo Deza <adeza@redhat.com>

src/ceph-volume/ceph_volume/tests/test_configuration.py

@@ -0,0 +1,73 @@
+import os
+try:
+    from cStringIO import StringIO
+except ImportError:
+    from io import StringIO
+from textwrap import dedent
+import pytest
+from ceph_volume import configuration, exceptions
+
+
+class TestConf(object):
+
+    def setup(self):
+        self.conf_file = StringIO(dedent("""
+        [foo]
+        default = 0
+        """))
+
+    def test_get_non_existing_list(self):
+        cfg = configuration.Conf()
+        cfg.readfp(self.conf_file)
+        assert cfg.get_list('global', 'key') == []
+
+    def test_get_non_existing_list_get_default(self):
+        cfg = configuration.Conf()
+        cfg.readfp(self.conf_file)
+        assert cfg.get_list('global', 'key', ['a']) == ['a']
+
+    def test_get_rid_of_comments(self):
+        cfg = configuration.Conf()
+        conf_file = StringIO(dedent("""
+        [foo]
+        default = 0  # this is a comment
+        """))
+
+        cfg.readfp(conf_file)
+        assert cfg.get_list('foo', 'default') == ['0']
+
+    def test_gets_split_on_commas(self):
+        cfg = configuration.Conf()
+        conf_file = StringIO(dedent("""
+        [foo]
+        default = 0,1,2,3  # this is a comment
+        """))
+
+        cfg.readfp(conf_file)
+        assert cfg.get_list('foo', 'default') == ['0', '1', '2', '3']
+
+    def test_spaces_and_tabs_are_ignored(self):
+        cfg = configuration.Conf()
+        conf_file = StringIO(dedent("""
+        [foo]
+        default = 0,        1,  2 ,3  # this is a comment
+        """))
+
+        cfg.readfp(conf_file)
+        assert cfg.get_list('foo', 'default') == ['0', '1', '2', '3']
+
+
+class TestLoad(object):
+
+    def test_path_does_not_exist(self):
+        with pytest.raises(exceptions.ConfigurationError):
+            configuration.load('/path/does/not/exist/ceph.con')
+
+    def test_unable_to_read_configuration(self, tmpdir, capsys):
+        ceph_conf = os.path.join(str(tmpdir), 'ceph.conf')
+        with open(ceph_conf, 'w') as config:
+            config.write(']broken] config\n[[')
+        configuration.load(ceph_conf)
+        stdout, stderr = capsys.readouterr()
+        assert 'Unable to read configuration file' in stdout
+        assert 'File contains no section headers' in stdout