Created Unit model

command: rails generate redmine_plugin_model body_tracking unit
name:string shortname:string type:integer

test/unit/unit_test.rb

@@ -0,0 +1,9 @@
+require File.expand_path('../../test_helper', __FILE__)
+
+class UnitTest < ActiveSupport::TestCase
+
+  # Replace this with your real tests.
+  def test_truth
+    assert true
+  end
+end