feat: nhl.com site

I was having trouble with the extant sites for this channel so I decided to add a source for the league's own guide. Unfortunately it's missing images since I don't know where they need to be hosted :(

sites/nhl.com/nhl.com.test.js

@@ -0,0 +1,44 @@
+const { parser, url } = require('./nhl.com.config.js')
+const fs = require('fs')
+const path = require('path')
+const dayjs = require('dayjs')
+const utc = require('dayjs/plugin/utc')
+const customParseFormat = require('dayjs/plugin/customParseFormat')
+dayjs.extend(customParseFormat)
+dayjs.extend(utc)
+
+const date = dayjs.utc('2024-11-21', 'YYYY-MM-DD').startOf('d')
+
+it('can generate valid url', () => {
+  expect(url({ date })).toBe(
+    'https://api-web.nhle.com/v1/network/tv-schedule/2024-11-21'
+  )
+})
+
+it('can parse response', () => {
+  const content = fs.readFileSync(path.resolve(__dirname, '__data__/content.json'))
+  let results = parser({ content, date })
+  results = results.map(p => {
+    p.start = p.start.toJSON()
+    p.stop = p.stop.toJSON()
+    return p
+  })
+
+  expect(results[0]).toMatchObject({
+    start: '2024-11-21T12:00:00.000Z',
+    stop: '2024-11-21T13:00:00.000Z',
+    title: 'On The Fly',
+    category: 'Sports non-event',
+  })
+})
+
+it('can handle empty guide', () => {
+  const results = parser({ content: JSON.stringify({
+    // extra props not necessary but they form a valid response
+    date: "2024-11-21",
+    startDate: "2024-11-07",
+    endDate: "2024-12-05",
+    broadcasts: [],
+  }) })
+  expect(results).toMatchObject([])
+})