Merge pull request #10152 from Noemj/statement_cache

Statement cache

Conflicts:
	activerecord/CHANGELOG.md

1 files changed, 64 insertions, 0 deletions

diff --git a/activerecord/test/cases/statement_cache_test.rb b/activerecord/test/cases/statement_cache_test.rb
new file mode 100644
index 0000000000..a8c97cccd4
--- /dev/null
+++ b/activerecord/test/cases/statement_cache_test.rb
@@ -0,0 +1,64 @@
+require 'cases/helper'
+require 'models/book'
+require 'models/liquid'
+require 'models/molecule'
+require 'models/electron'
+
+module ActiveRecord
+  class StatementCacheTest < ActiveRecord::TestCase
+    def setup
+      @connection = ActiveRecord::Base.connection
+    end
+
+    def test_statement_cache_with_simple_statement
+      cache = ActiveRecord::StatementCache.new do
+        Book.where(name: "my book").where("author_id > 3")
+      end
+
+      Book.create(name: "my book", author_id: 4)
+
+      books = cache.execute
+      assert_equal "my book", books[0].name
+    end
+
+    def test_statement_cache_with_nil_statement_raises_error
+      assert_raise(ArgumentError) do
+        cache = ActiveRecord::StatementCache.new do
+          nil
+        end
+      end
+    end
+
+    def test_statement_cache_with_complex_statement
+      cache = ActiveRecord::StatementCache.new do
+        Liquid.joins(:molecules => :electrons).where('molecules.name' => 'dioxane', 'electrons.name' => 'lepton')
+      end
+
+      salty = Liquid.create(name: 'salty')
+      molecule = salty.molecules.create(name: 'dioxane')
+      electron = molecule.electrons.create(name: 'lepton')
+
+      liquids = cache.execute
+      assert_equal "salty", liquids[0].name
+    end
+
+    def test_statement_cache_values_differ
+      cache = ActiveRecord::StatementCache.new do
+        Book.where(name: "my book")
+      end
+
+      for i in 0..2 do
+        Book.create(name: "my book")
+      end
+
+      first_books = cache.execute
+
+      for i in 0..2 do
+        Book.create(name: "my book")
+      end
+
+      additional_books = cache.execute
+      assert first_books != additional_books
+    end
+  end
+end