avocado.settings: Add settings_unittest

Add a unittest for the settings implementation. This
module will check the type conversion utility, as well
as functions behave the way we expect them to.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

unittests/avocado/settings_unittest.py

+#!/usr/bin/env python
+
+import unittest
+import os
+import sys
+import tempfile
+
+# simple magic for using scripts within a source tree
+basedir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+basedir = os.path.dirname(basedir)
+if os.path.isdir(os.path.join(basedir, 'avocado')):
+    sys.path.append(basedir)
+
+from avocado import settings
+
+example_1 = """[foo]
+str_key = frobnicate
+int_key = 1
+float_key = 1.25
+bool_key = True
+list_key = I, love, settings
+empty_key =
+"""
+
+
+class SettingsTest(unittest.TestCase):
+
+    def setUp(self):
+        self.config_file = tempfile.NamedTemporaryFile(delete=False)
+        self.config_file.write(example_1)
+        self.config_file.close()
+        self.settings = settings.Settings(self.config_file.name)
+
+    def testStringConversion(self):
+        self.assertEqual(self.settings.get_value('foo', 'str_key', str),
+                         'frobnicate')
+
+    def testIntConversion(self):
+        self.assertEqual(self.settings.get_value('foo', 'int_key', int), 1)
+
+    def testFloatConversion(self):
+        self.assertEqual(self.settings.get_value('foo', 'float_key', float),
+                         1.25)
+
+    def testBoolConversion(self):
+        self.assertTrue(self.settings.get_value('foo', 'bool_key', bool))
+
+    def testListConversion(self):
+        self.assertEqual(self.settings.get_value('foo', 'list_key', list),
+                         ['I', 'love', 'settings'])
+
+    def testDefault(self):
+        self.assertEqual(self.settings.get_value('foo', 'non_existing',
+                                                 str, "ohnoes"), "ohnoes")
+
+    def testNonExistingKey(self):
+        with self.assertRaises(settings.SettingsError):
+            self.settings.get_value('foo', 'non_existing', str)
+
+    def testAllowBlankTrueStr(self):
+        self.assertEqual(self.settings.get_value('foo', 'empty_key', str,
+                                                 allow_blank=True), "")
+
+    def testAllowBlankTrueInt(self):
+        self.assertEqual(self.settings.get_value('foo', 'empty_key', int,
+                                                 allow_blank=True), 0)
+
+    def testAllowBlankTrueFloat(self):
+        self.assertEqual(self.settings.get_value('foo', 'empty_key', float,
+                                                 allow_blank=True), 0.0)
+
+    def testAllowBlankTrueList(self):
+        self.assertEqual(self.settings.get_value('foo', 'empty_key', list,
+                                                 allow_blank=True), [])
+
+    def testAllowBlankTrueBool(self):
+        self.assertEqual(self.settings.get_value('foo', 'empty_key', bool,
+                                                 allow_blank=True), False)
+
+    def testAllowBlankTrueOther(self):
+        self.assertEqual(self.settings.get_value('foo', 'empty_key', 'baz',
+                                                 allow_blank=True), None)
+
+    def testAllowBlankFalse(self):
+        with self.assertRaises(settings.SettingsError):
+            self.settings.get_value('foo', 'empty_key', str)
+
+    def tearDown(self):
+        os.unlink(self.config_file.name)
+
+if __name__ == '__main__':
+    unittest.main()