plugin config - default activity setting

- this can be set to make the new 'Start tracking for issue' function a
  one click operation

test/unit/stopwatch_test.rb

@@ -0,0 +1,78 @@
+require_relative '../test_helper'
+
+class StopwatchTest < ActiveSupport::TestCase
+  fixtures :projects, :enabled_modules, :enumerations
+
+  setup do
+    @project = Project.find 'ecookbook'
+    @te = TimeEntry.new project: @project
+  end
+
+  test "default value for default_activity" do
+    assert_equal 'always_ask', Stopwatch.default_activity
+  end
+
+  test "should find default activity" do
+    with_settings plugin_stopwatch: { 'default_activity' => 9} do
+      assert_equal 'Design', Stopwatch.default_activity.name
+    end
+    with_settings plugin_stopwatch: { 'default_activity' => '11'} do
+      assert_equal 'QA', Stopwatch.default_activity.name
+    end
+  end
+
+  ### 'system' -> ask if there is no sys default / more than one availabale activity
+
+  test "should use system default activity for te" do
+    with_settings plugin_stopwatch: { 'default_activity' => 'system' } do
+      assert_equal 'Development', Stopwatch.default_activity_for(@te).name
+    end
+  end
+
+  test "should use single active project activity for time entry" do
+    with_settings plugin_stopwatch: { 'default_activity' => 'system' } do
+      TimeEntryActivity.create! active: false, project: @project, name: 'Development', parent_id: 10
+      TimeEntryActivity.create! active: false, project: @project, name: 'QA', parent_id: 11
+      assert_equal 'Design', Stopwatch.default_activity_for(@te).name
+    end
+  end
+
+  test "should ask if more than one and no default" do
+    with_settings plugin_stopwatch: { 'default_activity' => 'system' } do
+      TimeEntryActivity.update_all is_default: false
+      assert_nil Stopwatch.default_activity_for(@te)
+    end
+  end
+
+  ### always_ask (the default)
+
+  test "should return nil if always ask is set" do
+    assert_nil Stopwatch.default_activity_for(@te)
+
+    TimeEntryActivity.create! active: false, project: @project, name: 'Development'
+    assert_nil Stopwatch.default_activity_for(@te)
+
+    TimeEntryActivity.where(name: 'Development').delete_all
+    assert_nil Stopwatch.default_activity_for(@te)
+  end
+
+  ### specific activity -> ask only if this is not available in project
+
+  test "should use configured default activity for time entry" do
+    with_settings plugin_stopwatch: { 'default_activity' => '9' } do
+      assert_equal 'Design', Stopwatch.default_activity_for(@te).name
+    end
+  end
+
+  test "should not have default if unavailable" do
+    TimeEntryActivity.create! active: false, project: @project, name: 'Design', parent_id: 9
+    TimeEntryActivity.create! active: false, project: @project, name: 'Development', parent_id: 11
+    assert_equal [10], @project.activities.pluck(:id)
+
+    with_settings plugin_stopwatch: { 'default_activity' => '9'} do
+      assert_nil Stopwatch.default_activity_for(@te)
+    end
+  end
+
+end
+