Added installed test

Signed-off-by: Dimitris Zlatanidis <d.zlatanidis@gmail.com>

tests/test_installed.py

@@ -0,0 +1,20 @@
+import unittest
+from slpkg.pkg.installed import GetFromInstalled
+
+
+class TestPkgInstalled(unittest.TestCase):
+
+    def setUp(self):
+        self.pkg_name = 'aaa_base'
+        self.pkg_ver = '15.0'
+        self.installed = GetFromInstalled('aaa_base')
+
+    def test_pkg_name(self):
+        self.assertEqual(self.pkg_name, self.installed.name())
+
+    def test_pkg_version(self):
+        self.assertEqual(self.pkg_ver, self.installed.version())
+
+
+if __name__ == "__main__":
+    unittest.main()