Add a unit test.

This also changes the Jenkinsfile so the tests run on Jenkins.

Change-Id: Ib7fbc226e81a574e7068f5d1eba8491cdb523f17
diff --git a/Jenkinsfile b/Jenkinsfile
index fc6bb76..aa49804 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -33,13 +33,26 @@
         container('debian') {
           ansiColor('xterm') {
             sh """
-              colormake 
+              colormake -j4
             """
           }
         }
       }
     }
 
+    stage('Test') {
+      steps {
+        container('debian') {
+          ansiColor('xterm') {
+            sh """
+              colormake test-junit -j4
+            """
+            junit 'test-results/**/*.xml'
+          }
+        }
+      }
+    }
+
     stage('Archive artifacts') {
       steps {
         container('baker') {