kernel_v2: test for box_url

plugins/kernel_v2/config/vm.rb

@@ -329,9 +329,7 @@ module VagrantPlugins
         end
 
         # Make sure the box URL is an array if it is set
-        if @box_url && !@box_url.is_a?(Array)
-          @box_url = [@box_url]
-        end
+        @box_url = Array(@box_url) if @box_url
 
         # Set the guest properly
         @guest = @guest.to_sym if @guest

templates/locales/en.yml

@@ -1329,7 +1329,6 @@ en:
           destroying: "Deleting box '%{name}'..."
         download:
           cleaning: "Cleaning up downloaded box..."
-          downloading: "Downloading box from URL: %{url}"
           download_failed: |-
             Download failed. Will try another box URL if there is one.
           interrupted: "Box download was interrupted. Exiting."

test/unit/plugins/kernel_v2/config/vm_test.rb

@@ -33,10 +33,27 @@ describe VagrantPlugins::Kernel_V2::VMConfig do
   end
 
   describe "#box_url" do
-    it "defaults properly" do
+    it "defaults to nil" do
       subject.finalize!
+
       expect(subject.box_url).to be_nil
     end
+
+    it "turns into an array" do
+      subject.box_url = "foo"
+      subject.finalize!
+
+      expect(subject.box_url).to eq(
+        ["foo"])
+    end
+
+    it "keeps in array" do
+      subject.box_url = ["foo", "bar"]
+      subject.finalize!
+
+      expect(subject.box_url).to eq(
+        ["foo", "bar"])
+    end
   end
 
   context "#box_version" do