Add skip_until_version test helper

This helper will skip the test ONLY if the gem version is below the
specified version.

This ensures that changes meant for a particular version release are
included, and not forgotten or otherwise missed.

test/integration/integration_behaviour.rb

@@ -35,7 +35,7 @@ module IntegrationBehaviour
     end
 
     test "unserializable corruption is prevented" do
-      skip "Deferred until 2.0.0"
+      skip_until_version("2.0.0")
       # Cursors are serialized as JSON, but not all objects are serializable.
       #     time   = Time.at(0).utc   # => 1970-01-01 00:00:00 UTC
       #     json   = JSON.dump(time)  # => "\"1970-01-01 00:00:00 UTC\""

test/test_helper.rb

@@ -96,6 +96,10 @@ class TestCase
     setup do
       Redis.current.flushdb
     end
+
+    def skip_until_version(version)
+      skip("Deferred until version #{version}") if Gem::Version.new(JobIteration::VERSION) < Gem::Version.new(version)
+    end
   end
 end
 

test/unit/iteration_test.rb

@@ -200,38 +200,38 @@ def foo
   end
 
   def test_jobs_using_time_cursor_will_raise
-    skip("Deferred until 2.0.0")
+    skip_until_version("2.0.0")
     push(JobWithTimeCursor)
     assert_raises_cursor_error { work_one_job }
   end
 
   def test_jobs_using_active_record_cursor_will_raise
-    skip("Deferred until 2.0.0")
+    skip_until_version("2.0.0")
     refute_nil(Product.first)
     push(JobWithActiveRecordCursor)
     assert_raises_cursor_error { work_one_job }
   end
 
   def test_jobs_using_symbol_cursor_will_raise
-    skip("Deferred until 2.0.0")
+    skip_until_version("2.0.0")
     push(JobWithSymbolCursor)
     assert_raises_cursor_error { work_one_job }
   end
 
   def test_jobs_using_string_subclass_cursor_will_raise
-    skip("Deferred until 2.0.0")
+    skip_until_version("2.0.0")
     push(JobWithStringSubclassCursor)
     assert_raises_cursor_error { work_one_job }
   end
 
   def test_jobs_using_basic_object_cursor_will_raise
-    skip("Deferred until 2.0.0")
+    skip_until_version("2.0.0")
     push(JobWithBasicObjectCursor)
     assert_raises_cursor_error { work_one_job }
   end
 
   def test_jobs_using_complex_but_serializable_cursor_will_not_raise
-    skip("Deferred until 2.0.0")
+    skip_until_version("2.0.0")
     push(JobWithComplexCursor)
     work_one_job
   end