Add DailyLearning.getCalendars()

src/DailyLearning.ts

@@ -34,4 +34,9 @@ export class DailyLearning {
     }
     return null;
   }
+
+  /** Returns the names of all calendars registered */
+  static getCalendars(): string[] {
+    return Array.from(cals.keys());
+  }
 }

test/DailyLearning.spec.ts

@@ -0,0 +1,18 @@
+import {expect, test} from 'vitest';
+import {HDate} from '@hebcal/hdate';
+import {DailyLearning} from '../src/DailyLearning';
+
+test('DailyLearning', () => {
+  expect(DailyLearning.getCalendars()).toEqual([]);
+  const dummy = () => {return null};
+  const hd = new HDate();
+  DailyLearning.addCalendar('Foo', dummy);
+  DailyLearning.addCalendar('Bar', dummy);
+  expect(DailyLearning.getCalendars()).toEqual(['Foo', 'Bar']);
+  const dummy2 = () => {return {bogus: true}};
+  DailyLearning.addCalendar('Quux', dummy2);
+  expect(DailyLearning.getCalendars()).toEqual(['Foo', 'Bar', 'Quux']);
+  expect(DailyLearning.lookup('Foo', hd, false)).toBeNull();
+  expect(DailyLearning.lookup('Bar', hd, false)).toBeNull();
+  expect(DailyLearning.lookup('Quux', hd, false)).toEqual({bogus: true});
+});