Merge pull request #6706 from metabase/fix-calendar-unit-test

fix Calendar.unit.test.js not using mocked date

frontend/test/components/Calendar.unit.test.js

 import React from "react";
 import renderer from "react-test-renderer";
 import moment from "moment";
+import mockDate from "mockdate";
 import { mount } from "enzyme";
 
 import Calendar from "../../src/metabase/components/Calendar";
 
 describe("Calendar", () => {
+    afterEach(() => {
+        mockDate.reset();
+    });
+
     it("should render correctly", () => {
+        // set the system clock to the snapshot's current date
+        mockDate.set('2018-01-12T12:00:00Z', 0);
         const tree = renderer.create(
             <Calendar selected={moment("2018-01-01")} onChange={() => {}}/>
         ).toJSON();

package.json

@@ -131,6 +131,7 @@
     "karma-nyan-reporter": "^0.2.2",
     "karma-webpack": "^2.0.5",
     "lint-staged": "^3.3.1",
+    "mockdate": "^2.0.2",
     "postcss-cssnext": "^2.4.0",
     "postcss-import": "^9.0.0",
     "postcss-loader": "^2.0.8",

yarn.lock

@@ -6128,6 +6128,10 @@ mkdirp@~0.3.5:
   version "0.3.5"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.3.5.tgz#de3e5f8961c88c787ee1368df849ac4413eca8d7"
 
+mockdate@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/mockdate/-/mockdate-2.0.2.tgz#5ae0c0eaf8fe23e009cd01f9889b42c4f634af12"
+
 module-deps-sortable@4.0.6:
   version "4.0.6"
   resolved "https://registry.yarnpkg.com/module-deps-sortable/-/module-deps-sortable-4.0.6.tgz#1251a4ba2c44a92df6989bd029da121a4f2109b0"