refactor(GitHubCommitActivity): switch to v4/GraphQL API (#6959)

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

services/github/github-commit-activity.spec.js

@@ -0,0 +1,64 @@
+import { expect } from 'chai'
+import sinon from 'sinon'
+import { InvalidResponse } from '../index.js'
+import GitHubCommitActivity from './github-commit-activity.service.js'
+
+describe('GitHubCommitActivity', function () {
+  describe('transform', function () {
+    it('throws InvalidResponse on invalid branch and null object', function () {
+      expect(() =>
+        GitHubCommitActivity.transform({
+          data: { repository: { object: null } },
+        })
+      )
+        .to.throw(InvalidResponse)
+        .with.property('prettyMessage', 'invalid branch')
+    })
+  })
+  describe('getIntervalQueryStartDate', function () {
+    /** @type {sinon.SinonFakeTimers} */
+    let clock
+    beforeEach(function () {
+      clock = sinon.useFakeTimers()
+    })
+    afterEach(function () {
+      clock.restore()
+    })
+
+    it('provides correct value for yearly interval', function () {
+      clock.tick(new Date('2021-08-28T02:21:34.000Z').getTime())
+      expect(
+        GitHubCommitActivity.getIntervalQueryStartDate({
+          interval: 'y',
+        })
+      ).to.equal('2020-08-28T02:21:34.000Z')
+    })
+
+    it('provides correct value for simple monthly interval', function () {
+      clock.tick(new Date('2021-03-31T02:21:34.000Z').getTime())
+      expect(
+        GitHubCommitActivity.getIntervalQueryStartDate({
+          interval: 'm',
+        })
+      ).to.equal('2021-03-01T02:21:34.000Z')
+    })
+
+    it('provides correct value for fun monthly interval', function () {
+      clock.tick(new Date('2021-03-07T02:21:34.000Z').getTime())
+      expect(
+        GitHubCommitActivity.getIntervalQueryStartDate({
+          interval: '4w',
+        })
+      ).to.equal('2021-02-05T02:21:34.000Z')
+    })
+
+    it('provides correct value for weekly interval', function () {
+      clock.tick(new Date('2021-12-31T23:59:34.000Z').getTime())
+      expect(
+        GitHubCommitActivity.getIntervalQueryStartDate({
+          interval: 'w',
+        })
+      ).to.equal('2021-12-24T23:59:34.000Z')
+    })
+  })
+})