1 files changed, 49 insertions, 0 deletions
diff --git a/activerecord/test/cases/connection_adapters/schema_cache_test.rb b/activerecord/test/cases/connection_adapters/schema_cache_test.rb
new file mode 100644
index 0000000000..d60de54aed
--- /dev/null
+++ b/activerecord/test/cases/connection_adapters/schema_cache_test.rb
@@ -0,0 +1,49 @@
+require "cases/helper"
+
+module ActiveRecord
+  module ConnectionAdapters
+    class SchemaCacheTest < ActiveRecord::TestCase
+      def setup
+        connection = ActiveRecord::Base.connection
+        @cache     = SchemaCache.new connection
+      end
+
+      def test_primary_key
+        assert_equal 'id', @cache.primary_keys['posts']
+      end
+
+      def test_primary_key_for_non_existent_table
+        assert_equal 'id', @cache.primary_keys['omgponies']
+      end
+
+      def test_primary_key_is_set_on_columns
+        posts_columns = @cache.columns_hash['posts']
+        assert posts_columns['id'].primary
+
+        (posts_columns.keys - ['id']).each do |key|
+          assert !posts_columns[key].primary
+        end
+      end
+
+      def test_caches_columns
+        columns = @cache.columns['posts']
+        assert_equal columns, @cache.columns['posts']
+      end
+
+      def test_caches_columns_hash
+        columns_hash = @cache.columns_hash['posts']
+        assert_equal columns_hash, @cache.columns_hash['posts']
+      end
+
+      def test_clearing_column_cache
+        @cache.columns['posts']
+        @cache.columns_hash['posts']
+
+        @cache.clear!
+
+        assert_equal 0, @cache.columns.size
+        assert_equal 0, @cache.columns_hash.size
+      end
+    end
+  end
+end