add arg check and pass old image

Author: anandkumarpatel

lib/models/apis/mavis.js

@@ -6,6 +6,8 @@ var ApiClient = require('simple-api-client');
 var util = require('util');
 var Boom = require('dat-middleware').Boom;
 var debug = require('debug')('runnable-api:mavis:model');
+var isObject = require('101/is-object');
+var isFunction = require('101/is-function');
 
 module.exports = Mavis;
 
@@ -26,15 +28,28 @@ Mavis.prototype.findDockForNetwork = function (cb) {
   this.findDockForContainer({}, cb);
 };
 
-Mavis.prototype.findDockForBuild = function (build, cb) {
+Mavis.prototype.findDockForBuild = function (contextVersion, cb) {
+  debug('findDockForBuild', formatArgs(arguments));
+
+  if (!isObject(contextVersion)) {
+    return cb(new Error('missing contextVersion'));
+  }
+
   var opts =  {
     type: 'container_build'
   };
-  opts.prevDuration = build.duration || 0;
+  opts.prevDuration = contextVersion.duration || 0;
+  opts.prevImage = contextVersion.dockerTag || null;
   this.findDock(opts, cb);
 };
 
 Mavis.prototype.findDockForContainer = function (contextVersion, cb) {
+  debug('findDockForContainer', formatArgs(arguments));
+
+  if (!isObject(contextVersion)) {
+    return cb(new Error('missing contextVersion'));
+  }
+
   var opts =  {
     type: 'container_run'
   };
@@ -104,10 +119,6 @@ function responseErr (res) {
   });
 }
 
-// TODO: add all the findDock types
-// Mavis.prototype.findDockForContainerCreate
-
-var isFunction = require('101/is-function');
 function formatArgs (args) {
   return Array.prototype.slice.call(args)
     .map(function (arg) {