refactor(mocks): extract from specs

test/mocks/child-process.js

@@ -0,0 +1,16 @@
+const rawCommits = [
+  'hash-one==SPLIT==commit-one==END==\n',
+  'hash-two==SPLIT==commit-two==END==\n'
+]
+
+module.exports = {
+  exec: (command, cb) => {
+    cb(
+      null,
+      /\.\.HEAD/.test(command) ?
+        rawCommits[0] :
+        rawCommits.join()
+    )
+  },
+  '@noCallThru': true
+}

test/mocks/registry.js

@@ -0,0 +1,20 @@
+const nock = require('nock')
+
+const availableModule = {
+  'dist-tags': {
+    latest: '1.33.7'
+  },
+  versions: {
+    '1.33.7': {
+      gitHead: 'HEAD'
+    }
+  }
+}
+
+module.exports = nock('http://registry.npmjs.org')
+  .get('/available')
+  .reply(200, availableModule)
+  .get('/@scoped/available')
+  .reply(200, availableModule)
+  .get('/unavailable')
+  .reply(404, {})