Add Simply Circles theme support

tests/Simply-Circles.js

@@ -0,0 +1,37 @@
+/*
+Night Theme Switcher Gnome Shell extension
+
+Copyright (C) 2020 Romain Vigier
+
+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 s ://www.gnu.org/licenses/>.
+*/
+
+const test = require('ava');
+const { Variants } = require('./_variants');
+
+
+['', '_Blue', '_Cyan', '_Green', '_Orange', '_Purple'].forEach(color => {
+	['', '_Envolved'].forEach(variant => {
+		test(`Simply_Circles${color}_Light${variant}`, t => {
+			const variants = Variants.guess_from(`Simply_Circles${color}_Light${variant}`);
+			t.is(variants.get('day'), `Simply_Circles${color}_Light${variant}`);
+			t.is(variants.get('night'), `Simply_Circles${color}_Dark${variant}`);
+		});
+
+		test(`Simply_Circles${color}${variant}`, t => {
+			const variants = Variants.guess_from(`Simply_Circles${color}_Dark${variant}`);
+			t.is(variants.get('day'), `Simply_Circles${color}_Light${variant}`);
+			t.is(variants.get('night'), `Simply_Circles${color}_Dark${variant}`);
+		});
+	})
+});