Tests: Should not error when template is to be created during build

post-processor/vagrant/post-processor_test.go

@@ -148,7 +148,14 @@ func TestPostProcessorPrepare_vagrantfileTemplateExists(t *testing.T) {
 	}
 
 	if err := p.Configure(c); err == nil {
-		t.Fatal("expected an error since vagrantfile_template does not exist")
+		t.Fatal("expected error since vagrantfile_template does not exist and vagrantfile_template_generated is unset")
+	}
+
+	// The vagrantfile_template will be generated during the build process
+	c["vagrantfile_template_generated"] = true
+
+	if err := p.Configure(c); err != nil {
+		t.Fatal("no error expected due to missing vagrantfile_template as vagrantfile_template_generated is set")
 	}
 }