Split up [github] testers (#2560)

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

services/github/github-commit-status.tester.js

@@ -0,0 +1,154 @@
+'use strict'
+
+const { colorScheme: colorsB } = require('../test-helpers')
+const { invalidJSON } = require('../response-fixtures')
+
+const t = (module.exports = require('../create-service-tester')())
+
+t.create('commit status - commit in branch')
+  .get(
+    '/badges/shields/master/5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c.json?style=_shields_test'
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'in master',
+    colorB: colorsB.brightgreen,
+  })
+
+t.create(
+  'commit status - checked commit is identical with the newest commit in branch'
+)
+  .get(
+    '/badges/shields/master/5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c.json?style=_shields_test'
+  )
+  .intercept(nock =>
+    nock('https://api.github.com')
+      .get(
+        '/repos/badges/shields/compare/master...5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c'
+      )
+      .reply(200, { status: 'identical' })
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'in master',
+    colorB: colorsB.brightgreen,
+  })
+
+t.create('commit status - commit not in branch')
+  .get(
+    '/badges/shields/master/960c5bf72d7d1539fcd453343eed3f8617427a41.json?style=_shields_test'
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'commit or branch not found',
+    colorB: colorsB.lightgrey,
+  })
+
+t.create('commit status - unknown commit id')
+  .get(
+    '/atom/atom/v1.27.1/7dfb45eb61a48a4ce18a0dd2e31f944ed4467ae3.json?style=_shields_test'
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'not in v1.27.1',
+    colorB: colorsB.yellow,
+  })
+
+t.create('commit status - unknown branch')
+  .get(
+    '/badges/shields/this-branch-does-not-exist/b551a3a8daf1c48dba32a3eab1edf99b10c28863.json?style=_shields_test'
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'commit or branch not found',
+    colorB: colorsB.lightgrey,
+  })
+
+t.create('commit status - no common ancestor between commit and branch')
+  .get(
+    '/badges/shields/master/b551a3a8daf1c48dba32a3eab1edf99b10c28863.json?style=_shields_test'
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'no common ancestor',
+    colorB: colorsB.lightgrey,
+  })
+
+t.create('commit status - invalid JSON')
+  .get(
+    '/badges/shields/master/5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c.json?style=_shields_test'
+  )
+  .intercept(nock =>
+    nock('https://api.github.com')
+      .get(
+        '/repos/badges/shields/compare/master...5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c'
+      )
+      .reply(invalidJSON)
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'invalid',
+    colorB: colorsB.lightgrey,
+  })
+
+t.create('commit status - network error')
+  .get(
+    '/badges/shields/master/5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c.json?style=_shields_test'
+  )
+  .networkOff()
+  .expectJSON({
+    name: 'commit status',
+    value: 'inaccessible',
+    colorB: colorsB.red,
+  })
+
+t.create('commit status - github server error')
+  .get(
+    '/badges/shields/master/5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c.json?style=_shields_test'
+  )
+  .intercept(nock =>
+    nock('https://api.github.com')
+      .get(
+        '/repos/badges/shields/compare/master...5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c'
+      )
+      .reply(500)
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'invalid',
+    colorB: colorsB.lightgrey,
+  })
+
+t.create('commit status - 404 with empty JSON form github')
+  .get(
+    '/badges/shields/master/5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c.json?style=_shields_test'
+  )
+  .intercept(nock =>
+    nock('https://api.github.com')
+      .get(
+        '/repos/badges/shields/compare/master...5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c'
+      )
+      .reply(404, {})
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'invalid',
+    colorB: colorsB.lightgrey,
+  })
+
+t.create('commit status - 404 with invalid JSON form github')
+  .get(
+    '/badges/shields/master/5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c.json?style=_shields_test'
+  )
+  .intercept(nock =>
+    nock('https://api.github.com')
+      .get(
+        '/repos/badges/shields/compare/master...5d4ab86b1b5ddfb3c4a70a70bd19932c52603b8c'
+      )
+      .reply(404, invalidJSON)
+  )
+  .expectJSON({
+    name: 'commit status',
+    value: 'invalid',
+    colorB: colorsB.lightgrey,
+  })