move tests from TagTest to ProjectMedia8Test

What we are testing is that tags are being created when we create a
project media.

The method we use to do that is a method called by project_media,
so I thought it made more sense to move the tests.

test/models/project_media_8_test.rb

@@ -0,0 +1,29 @@
+require_relative '../test_helper'
+
+class ProjectMedia8Test < ActiveSupport::TestCase
+  def setup
+    super
+    require 'sidekiq/testing'
+  end
+
+  test "when creating an item with tag/tags, tags should be created in the background" do
+    Sidekiq::Testing.inline!
+
+    t = create_team
+    p = create_project team: t
+    assert_nothing_raised do
+      create_project_media project: p, tags: ['one']
+    end
+  end
+
+  test "when creating an item with multiple tags, only one job should be scheduled" do
+    Sidekiq::Testing.fake!
+
+    t = create_team
+    p = create_project team: t
+    assert_nothing_raised do
+      create_project_media project: p, tags: ['one', 'two', 'three']
+    end
+    assert_equal 1, GenericWorker.jobs.size
+  end
+end

test/models/tag_test.rb

@@ -284,25 +284,4 @@ def setup
       create_tag tag: ' foo', annotated: pm2
     end
   end
-
-  test "tags should be created in the background" do
-    Sidekiq::Testing.inline!
-
-    t = create_team
-    p = create_project team: t
-    assert_nothing_raised do
-      create_project_media project: p, tags: ['one']
-    end
-  end
-
-  test "when creating multiple tags for the same item only one job should be scheduled" do
-    Sidekiq::Testing.fake!
-
-    t = create_team
-    p = create_project team: t
-    assert_nothing_raised do
-      create_project_media project: p, tags: ['one', 'two', 'three']
-    end
-    assert_equal 1, GenericWorker.jobs.size
-  end
 end