From d3c9d808e3e242155a44fd2a89ef272cfade8fe8 Mon Sep 17 00:00:00 2001
From: Matthew Draper <matthew@trebex.net>
Date: Mon, 22 Feb 2016 11:55:52 +1030
Subject: Publish AS::Executor and AS::Reloader APIs

These should allow external code to run blocks of user code to do
"work", at a similar unit size to a web request, without needing to get
intimate with ActionDipatch.
---
 activerecord/test/cases/query_cache_test.rb | 56 +++++++----------------------
 1 file changed, 13 insertions(+), 43 deletions(-)

(limited to 'activerecord/test/cases/query_cache_test.rb')

diff --git a/activerecord/test/cases/query_cache_test.rb b/activerecord/test/cases/query_cache_test.rb
index d84653e4c9..e53239cdee 100644
--- a/activerecord/test/cases/query_cache_test.rb
+++ b/activerecord/test/cases/query_cache_test.rb
@@ -16,7 +16,7 @@ class QueryCacheTest < ActiveRecord::TestCase
   def test_exceptional_middleware_clears_and_disables_cache_on_error
     assert !ActiveRecord::Base.connection.query_cache_enabled, 'cache off'
 
-    mw = ActiveRecord::QueryCache.new lambda { |env|
+    mw = middleware { |env|
       Task.find 1
       Task.find 1
       assert_equal 1, ActiveRecord::Base.connection.query_cache.length
@@ -31,7 +31,7 @@ class QueryCacheTest < ActiveRecord::TestCase
   def test_exceptional_middleware_leaves_enabled_cache_alone
     ActiveRecord::Base.connection.enable_query_cache!
 
-    mw = ActiveRecord::QueryCache.new lambda { |env|
+    mw = middleware { |env|
       raise "lol borked"
     }
     assert_raises(RuntimeError) { mw.call({}) }
@@ -42,7 +42,7 @@ class QueryCacheTest < ActiveRecord::TestCase
   def test_exceptional_middleware_assigns_original_connection_id_on_error
     connection_id = ActiveRecord::Base.connection_id
 
-    mw = ActiveRecord::QueryCache.new lambda { |env|
+    mw = middleware { |env|
       ActiveRecord::Base.connection_id = self.object_id
       raise "lol borked"
     }
@@ -53,7 +53,7 @@ class QueryCacheTest < ActiveRecord::TestCase
 
   def test_middleware_delegates
     called = false
-    mw = ActiveRecord::QueryCache.new lambda { |env|
+    mw = middleware { |env|
       called = true
       [200, {}, nil]
     }
@@ -62,7 +62,7 @@ class QueryCacheTest < ActiveRecord::TestCase
   end
 
   def test_middleware_caches
-    mw = ActiveRecord::QueryCache.new lambda { |env|
+    mw = middleware { |env|
       Task.find 1
       Task.find 1
       assert_equal 1, ActiveRecord::Base.connection.query_cache.length
@@ -74,50 +74,13 @@ class QueryCacheTest < ActiveRecord::TestCase
   def test_cache_enabled_during_call
     assert !ActiveRecord::Base.connection.query_cache_enabled, 'cache off'
 
-    mw = ActiveRecord::QueryCache.new lambda { |env|
+    mw = middleware { |env|
       assert ActiveRecord::Base.connection.query_cache_enabled, 'cache on'
       [200, {}, nil]
     }
     mw.call({})
   end
 
-  def test_cache_on_during_body_write
-    streaming = Class.new do
-      def each
-        yield ActiveRecord::Base.connection.query_cache_enabled
-      end
-    end
-
-    mw = ActiveRecord::QueryCache.new lambda { |env|
-      [200, {}, streaming.new]
-    }
-    body = mw.call({}).last
-    body.each { |x| assert x, 'cache should be on' }
-    body.close
-    assert !ActiveRecord::Base.connection.query_cache_enabled, 'cache disabled'
-  end
-
-  def test_cache_off_after_close
-    mw = ActiveRecord::QueryCache.new lambda { |env| [200, {}, nil] }
-    body = mw.call({}).last
-
-    assert ActiveRecord::Base.connection.query_cache_enabled, 'cache enabled'
-    body.close
-    assert !ActiveRecord::Base.connection.query_cache_enabled, 'cache disabled'
-  end
-
-  def test_cache_clear_after_close
-    mw = ActiveRecord::QueryCache.new lambda { |env|
-      Post.first
-      [200, {}, nil]
-    }
-    body = mw.call({}).last
-
-    assert !ActiveRecord::Base.connection.query_cache.empty?, 'cache not empty'
-    body.close
-    assert ActiveRecord::Base.connection.query_cache.empty?, 'cache should be empty'
-  end
-
   def test_cache_passing_a_relation
     post = Post.first
     Post.cache do
@@ -244,6 +207,13 @@ class QueryCacheTest < ActiveRecord::TestCase
       assert_equal 0, Post.where(title: 'rollback').to_a.count
     end
   end
+
+  private
+    def middleware(&app)
+      executor = Class.new(ActiveSupport::Executor)
+      ActiveRecord::QueryCache.install_executor_hooks executor
+      lambda { |env| executor.wrap { app.call(env) } }
+    end
 end
 
 class QueryCacheExpiryTest < ActiveRecord::TestCase
-- 
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