Split up [github] testers (#2560)

- Update github contributors badge for `create-service-tester`.

services/github/github-release.tester.js

@@ -0,0 +1,70 @@
+'use strict'
+
+const Joi = require('joi')
+const { isFormattedDate } = require('../test-validators')
+
+const t = (module.exports = require('../create-service-tester')())
+
+t.create('Release')
+  .get('/release/photonstorm/phaser.json')
+  .expectJSONTypes(Joi.object().keys({ name: 'release', value: Joi.string() }))
+
+t.create('Release (repo not found)')
+  .get('/release/badges/helmets.json')
+  .expectJSON({ name: 'release', value: 'repo not found' })
+
+t.create('(pre-)Release')
+  .get('/release-pre/photonstorm/phaser.json')
+  .expectJSONTypes(Joi.object().keys({ name: 'release', value: Joi.string() }))
+
+t.create('(pre-)Release (for legacy compatibility)')
+  .get('/release/photonstorm/phaser/all.json')
+  .expectJSONTypes(Joi.object().keys({ name: 'release', value: Joi.string() }))
+
+t.create('Release Date. e.g release date|today')
+  .get('/release-date/microsoft/vscode.json')
+  .expectJSONTypes(
+    Joi.object().keys({
+      name: 'release date',
+      value: isFormattedDate,
+    })
+  )
+
+t.create('Release Date - Custom Label. e.g myRelease|today')
+  .get('/release-date/microsoft/vscode.json?label=myRelease')
+  .expectJSONTypes(
+    Joi.object().keys({
+      name: 'myRelease',
+      value: isFormattedDate,
+    })
+  )
+
+t.create(
+  'Release Date - Should return `no releases or repo not found` for invalid repo'
+)
+  .get('/release-date/not-valid-name/not-valid-repo.json')
+  .expectJSON({ name: 'release date', value: 'no releases or repo not found' })
+
+t.create('(Pre-)Release Date. e.g release date|today')
+  .get('/release-date-pre/microsoft/vscode.json')
+  .expectJSONTypes(
+    Joi.object().keys({
+      name: 'release date',
+      value: isFormattedDate,
+    })
+  )
+
+t.create('(Pre-)Release Date - Custom Label. e.g myRelease|today')
+  .get('/release-date-pre/microsoft/vscode.json?label=myRelease')
+  .expectJSONTypes(
+    Joi.object().keys({
+      name: 'myRelease',
+      value: isFormattedDate,
+    })
+  )
+
+t.create(
+  '(Pre-)Release Date - Should return `no releases or repo not found` for invalid repo'
+)
+  .get('/release-date-pre/not-valid-name/not-valid-repo.json')
+  .expectJSON({ name: 'release date', value: 'no releases or repo not found' })