WP Date: Fix JS unit tests

bootstrap-test.js

@@ -25,3 +25,31 @@ global.window.tinyMCEPreInit = {
 	// <script> tag where it was loaded from, which of course fails here.
 	baseURL: 'about:blank',
 };
+global.window._wpDateSettings = {
+	formats: {
+		date: 'j F Y',
+		datetime: 'j F Y G \h i \m\i\n',
+		time: 'G \h i \m\i\n',
+	},
+	l10n: {
+		locale: 'en',
+		meridiem: {
+			am: 'am',
+			AM: 'AM',
+			pm: 'pm',
+			PM: 'PM',
+		},
+		months: [ 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December' ],
+		monthsShort: [ 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec' ],
+		weekdays: [ 'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday' ],
+		weekdaysShort: [ 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat' ],
+		relative: {
+			future: '%s from now',
+			past: '%s ago',
+		},
+	},
+	timezone: {
+		offset: '-5',
+		string: 'America/New_York',
+	},
+};

date/index.js

@@ -169,7 +169,7 @@ const formatMap = {
 function setupLocale( settings ) {
 	// Backup and restore current locale.
 	const currentLocale = moment.locale();
-	moment.defineLocale( settings.l10n.locale, {
+	moment.updateLocale( settings.l10n.locale, {
 		// Inherit anything missing from the default locale.
 		parentLocale: currentLocale,
 		months: settings.l10n.months,