ADD addon-contexts: tests on serializers

addons/contexts/src/shared/serializers.test.ts

@@ -0,0 +1,19 @@
+import { deserialize, serialize } from './serializers';
+
+describe('Test on serializers', () => {
+  const someContextsQueryParam = 'CSS Themes=Forests,Languages=Fr';
+  const someSelectionState = {
+    'CSS Themes': 'Forests',
+    Languages: 'Fr',
+  };
+
+  it('Should serialize selection state into its string representation', () => {
+    expect(serialize(null)).toEqual(null);
+    expect(serialize(someSelectionState)).toEqual(someContextsQueryParam);
+  });
+
+  it('Should deserialize a string representation into the represented selection state', () => {
+    expect(deserialize('')).toEqual(undefined);
+    expect(deserialize(someContextsQueryParam)).toEqual(someSelectionState);
+  });
+});