1 files changed, 115 insertions, 0 deletions
diff --git a/activerecord/test/cases/connection_adapters/type/type_map_test.rb b/activerecord/test/cases/connection_adapters/type/type_map_test.rb
new file mode 100644
index 0000000000..4b4d9f6b0f
--- /dev/null
+++ b/activerecord/test/cases/connection_adapters/type/type_map_test.rb
@@ -0,0 +1,115 @@
+require "cases/helper"
+
+module ActiveRecord
+  module ConnectionAdapters
+    module Type
+      class TypeMapTest < ActiveRecord::TestCase
+        def test_default_type
+          mapping = TypeMap.new
+
+          assert_kind_of Value, mapping.lookup(:undefined)
+        end
+
+        def test_registering_types
+          boolean = Boolean.new
+          mapping = TypeMap.new
+
+          mapping.register_type(/boolean/i, boolean)
+
+          assert_equal mapping.lookup('boolean'), boolean
+        end
+
+        def test_overriding_registered_types
+          time = Time.new
+          timestamp = DateTime.new
+          mapping = TypeMap.new
+
+          mapping.register_type(/time/i, time)
+          mapping.register_type(/time/i, timestamp)
+
+          assert_equal mapping.lookup('time'), timestamp
+        end
+
+        def test_fuzzy_lookup
+          string = String.new
+          mapping = TypeMap.new
+
+          mapping.register_type(/varchar/i, string)
+
+          assert_equal mapping.lookup('varchar(20)'), string
+        end
+
+        def test_aliasing_types
+          string = String.new
+          mapping = TypeMap.new
+
+          mapping.register_type(/string/i, string)
+          mapping.alias_type(/varchar/i, 'string')
+
+          assert_equal mapping.lookup('varchar'), string
+        end
+
+        def test_changing_type_changes_aliases
+          time = Time.new
+          timestamp = DateTime.new
+          mapping = TypeMap.new
+
+          mapping.register_type(/timestamp/i, time)
+          mapping.alias_type(/datetime/i, 'timestamp')
+          mapping.register_type(/timestamp/i, timestamp)
+
+          assert_equal mapping.lookup('datetime'), timestamp
+        end
+
+        def test_aliases_keep_metadata
+          mapping = TypeMap.new
+
+          mapping.register_type(/decimal/i) { |sql_type| sql_type }
+          mapping.alias_type(/number/i, 'decimal')
+
+          assert_equal mapping.lookup('number(20)'), 'decimal(20)'
+          assert_equal mapping.lookup('number'), 'decimal'
+        end
+
+        def test_register_proc
+          string = String.new
+          binary = Binary.new
+          mapping = TypeMap.new
+
+          mapping.register_type(/varchar/i) do |type|
+            if type.include?('(')
+              string
+            else
+              binary
+            end
+          end
+
+          assert_equal mapping.lookup('varchar(20)'), string
+          assert_equal mapping.lookup('varchar'), binary
+        end
+
+        def test_requires_value_or_block
+          mapping = TypeMap.new
+
+          assert_raises(ArgumentError) do
+            mapping.register_type(/only key/i)
+          end
+        end
+
+        def test_lookup_non_strings
+          mapping = HashLookupTypeMap.new
+
+          mapping.register_type(1, 'string')
+          mapping.register_type(2, 'int')
+          mapping.alias_type(3, 1)
+
+          assert_equal mapping.lookup(1), 'string'
+          assert_equal mapping.lookup(2), 'int'
+          assert_equal mapping.lookup(3), 'string'
+          assert_kind_of Type::Value, mapping.lookup(4)
+        end
+      end
+    end
+  end
+end
+