[appveyor bitbucket buildkite circleci codeship continuousphp docker readthedocs scrutinizer shippable travis] Extracted isBuildStatus test validator (#1767)

services/test-validators.js

@@ -69,6 +69,10 @@ const isFormattedDate = Joi.alternatives().try(
 
 const isDependencyState = withRegex(/^(\d+ out of date|\d+ deprecated|up to date)$/);
 
+const isBuildStatus = Joi.equal('building', 'cancelled', 'error', 'expired', 'failed', 'failing', 'no tests',  
+                                'not built', 'not run', 'passing', 'pending', 'processing', 'queued', 'running',  
+                                'scheduled', 'skipped', 'stopped', 'success', 'timeout', 'unstable', 'waiting');
+
 module.exports = {
   isSemver,
   isVPlusTripleDottedVersion,
@@ -86,5 +90,6 @@ module.exports = {
   isDecimalPercentage,
   isFileSize,
   isFormattedDate,
-  isDependencyState
+  isDependencyState,
+  isBuildStatus,
 };