[core/theme] Add simple theme stub

Add support for default fg/bg colors

tests/core/test_theme.py

@@ -0,0 +1,28 @@
+import unittest
+
+import core.theme
+
+class theme(unittest.TestCase):
+    def setUp(self):
+        self.invalidThemeName = 'this-theme-does-not-exist'
+        self.validThemeName = 'default'
+        self.defaults = {
+            'defaults': {
+                'fg': 'red', 'bg': 'black'
+            }
+        }
+
+    def test_invalid_theme(self):
+        with self.assertRaises(RuntimeError):
+            core.theme.Theme(self.invalidThemeName)
+
+    def test_valid_theme(self):
+        theme = core.theme.Theme(self.validThemeName)
+        self.assertEqual(self.validThemeName, theme.name)
+
+    def test_defaults(self):
+        theme = core.theme.Theme(raw_data=self.defaults)
+        self.assertEqual(self.defaults['defaults']['fg'], theme.fg())
+        self.assertEqual(self.defaults['defaults']['bg'], theme.bg())
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4