feat: two weeks = 15 day span bug (#35)

README.md

@@ -14,7 +14,7 @@ Base URL: `https://jp-holidays.vercel.app`
 | Parameter    |  Type   | Required | Default | Description                                                           |
 | ------------ | :-----: | :------: | :-----: | --------------------------------------------------------------------- |
 | from         | string  |    △     |         | start date <br /> \* required if offset is not set                    |
-| to           | string  |          |         | end date <br /> \* will be from+14 days if not set                    |
+| to           | string  |          |         | end date <br /> \* will be from+13 days if not set (2 weeks)          |
 | offset       | string  |    △     |         | offset from today (exp: 4 days) <br /> \* required if from is not set |
 | only_weekday | boolean |          |  false  | only return holidays in weekdays                                      |
 

__test__/utils/edgeHelpers/getFromTo.spec.ts

@@ -48,15 +48,15 @@ describe('getFromTo', () => {
     const { data } = getFromTo(url);
 
     expect(data?.from.format('YYYYMMDD')).toBe('20100101');
-    expect(data?.to.format('YYYYMMDD')).toBe('20100115');
+    expect(data?.to.format('YYYYMMDD')).toBe('20100114');
   });
 
   it('plus 2 weeks from from if to is before from', () => {
     const url = 'https://example.com/holidays?from=20100101&to=20000101';
     const { data } = getFromTo(url);
 
     expect(data?.from.format('YYYYMMDD')).toBe('20100101');
-    expect(data?.to.format('YYYYMMDD')).toBe('20100115');
+    expect(data?.to.format('YYYYMMDD')).toBe('20100114');
   });
 
   it('parse from to correctly by from&to query parameters', () => {
@@ -72,6 +72,6 @@ describe('getFromTo', () => {
     const { data } = getFromTo(url);
 
     expect(data?.from.format('YYYYMMDD')).toBe('20220206');
-    expect(data?.to.format('YYYYMMDD')).toBe('20220220');
+    expect(data?.to.format('YYYYMMDD')).toBe('20220219');
   });
 });

src/utils/edgeHelpers.ts

@@ -70,7 +70,8 @@ export function getFromTo(url: string): {
 
   // validate range
   if (to == null || dayjs(to).isBefore(data.from)) {
-    data.to = data.from.add(14, 'day');
+    // 2 weeks
+    data.to = data.from.add(13, 'day');
   }
 
   return { data };