wip(shared): port sleep op

test/common/ops/sleep.js

@@ -0,0 +1,18 @@
+import sleep from '../../../common/script/ops/sleep';
+import {
+  generateUser,
+} from '../../helpers/common.helper';
+
+describe('shared.ops.sleep', () => {
+  it('changes user.preferences.sleep and returns the new value', () => {
+    let user = generateUser();
+
+    let res = sleep(user);
+    expect(res).to.equal(true);
+    expect(user.preferences.sleep).to.equal(true);
+
+    let res2 = sleep(user);
+    expect(res2).to.equal(false);
+    expect(user.preferences.sleep).to.equal(false);
+  });
+});