1 files changed, 192 insertions, 0 deletions
diff --git a/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb b/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb
new file mode 100644
index 0000000000..da852aaa02
--- /dev/null
+++ b/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb
@@ -0,0 +1,192 @@
+require "cases/helper"
+
+module ActiveRecord
+  module ConnectionAdapters
+    class MergeAndResolveDefaultUrlConfigTest < ActiveRecord::TestCase
+      def setup
+        @previous_database_url = ENV.delete("DATABASE_URL")
+      end
+
+      teardown do
+        ENV["DATABASE_URL"] = @previous_database_url
+      end
+
+      def resolve_config(config)
+        ActiveRecord::ConnectionHandling::MergeAndResolveDefaultUrlConfig.new(config).resolve
+      end
+
+      def resolve_spec(spec, config)
+        ConnectionSpecification::Resolver.new(resolve_config(config)).resolve(spec)
+      end
+
+      def test_resolver_with_database_uri_and_current_env_symbol_key
+        ENV['DATABASE_URL'] = "postgres://localhost/foo"
+        config   = { "not_production" => {  "adapter" => "not_postgres", "database" => "not_foo" } }
+        actual   = resolve_spec(:default_env, config)
+        expected = { "adapter"=>"postgresql", "database"=>"foo", "host"=>"localhost" }
+        assert_equal expected, actual
+      end
+
+      def test_resolver_with_database_uri_and_and_current_env_string_key
+        ENV['DATABASE_URL'] = "postgres://localhost/foo"
+        config   = { "default_env" => {  "adapter" => "not_postgres", "database" => "not_foo" } }
+        actual   = assert_deprecated { resolve_spec("default_env", config) }
+        expected = { "adapter"=>"postgresql", "database"=>"foo", "host"=>"localhost" }
+        assert_equal expected, actual
+      end
+
+      def test_resolver_with_database_uri_and_known_key
+        ENV['DATABASE_URL'] = "postgres://localhost/foo"
+        config   = { "production" => { "adapter" => "not_postgres", "database" => "not_foo", "host" => "localhost" } }
+        actual   = resolve_spec(:production, config)
+        expected = { "adapter"=>"not_postgres", "database"=>"not_foo", "host"=>"localhost" }
+        assert_equal expected, actual
+      end
+
+      def test_resolver_with_database_uri_and_unknown_symbol_key
+        ENV['DATABASE_URL'] = "postgres://localhost/foo"
+        config   = { "not_production" => {  "adapter" => "not_postgres", "database" => "not_foo" } }
+        assert_raises AdapterNotSpecified do
+          resolve_spec(:production, config)
+        end
+      end
+
+      def test_resolver_with_database_uri_and_unknown_string_key
+        ENV['DATABASE_URL'] = "postgres://localhost/foo"
+        config   = { "not_production" => {  "adapter" => "not_postgres", "database" => "not_foo" } }
+        assert_deprecated do
+          assert_raises AdapterNotSpecified do
+           resolve_spec("production", config)
+          end
+        end
+      end
+
+      def test_resolver_with_database_uri_and_supplied_url
+        ENV['DATABASE_URL'] = "not-postgres://not-localhost/not_foo"
+        config   = { "production" => {  "adapter" => "also_not_postgres", "database" => "also_not_foo" } }
+        actual   = resolve_spec("postgres://localhost/foo", config)
+        expected = { "adapter"=>"postgresql", "database"=>"foo", "host"=>"localhost" }
+        assert_equal expected, actual
+      end
+
+      def test_jdbc_url
+        config   = { "production" => { "url" => "jdbc:postgres://localhost/foo" } }
+        actual   = resolve_config(config)
+        assert_equal config, actual
+      end
+
+      def test_environment_does_not_exist_in_config_url_does_exist
+        ENV['DATABASE_URL'] = "postgres://localhost/foo"
+        config      = { "not_default_env" => {  "adapter" => "not_postgres", "database" => "not_foo" } }
+        actual      = resolve_config(config)
+        expect_prod = { "adapter"=>"postgresql", "database"=>"foo", "host"=>"localhost" }
+        assert_equal expect_prod, actual["default_env"]
+      end
+
+      def test_url_with_hyphenated_scheme
+        ENV['DATABASE_URL'] = "ibm-db://localhost/foo"
+        config   = { "default_env" => { "adapter" => "not_postgres", "database" => "not_foo", "host" => "localhost" } }
+        actual   = resolve_spec(:default_env, config)
+        expected = { "adapter"=>"ibm_db", "database"=>"foo", "host"=>"localhost" }
+        assert_equal expected, actual
+      end
+
+      def test_string_connection
+        config   = { "default_env" => "postgres://localhost/foo" }
+        actual   = resolve_config(config)
+        expected = { "default_env" =>
+                     { "adapter"  => "postgresql",
+                       "database" => "foo",
+                       "host"     => "localhost"
+                      }
+                    }
+        assert_equal expected, actual
+      end
+
+      def test_url_sub_key
+        config   = { "default_env" => { "url" => "postgres://localhost/foo" } }
+        actual   = resolve_config(config)
+        expected = { "default_env" =>
+                     { "adapter"  => "postgresql",
+                       "database" => "foo",
+                       "host"     => "localhost"
+                      }
+                    }
+        assert_equal expected, actual
+      end
+
+      def test_hash
+        config = { "production" => { "adapter" => "postgres", "database" => "foo" } }
+        actual = resolve_config(config)
+        assert_equal config, actual
+      end
+
+      def test_blank
+        config = {}
+        actual = resolve_config(config)
+        assert_equal config, actual
+      end
+
+      def test_blank_with_database_url
+        ENV['DATABASE_URL'] = "postgres://localhost/foo"
+
+        config   = {}
+        actual   = resolve_config(config)
+        expected = { "adapter"  => "postgresql",
+                     "database" => "foo",
+                     "host"     => "localhost" }
+        assert_equal expected, actual["default_env"]
+        assert_equal nil,      actual["production"]
+        assert_equal nil,      actual["development"]
+        assert_equal nil,      actual["test"]
+        assert_equal nil,      actual[:production]
+        assert_equal nil,      actual[:development]
+        assert_equal nil,      actual[:test]
+      end
+
+      def test_url_sub_key_with_database_url
+        ENV['DATABASE_URL'] = "NOT-POSTGRES://localhost/NOT_FOO"
+
+        config   = { "default_env" => { "url" => "postgres://localhost/foo" } }
+        actual   = resolve_config(config)
+        expected = { "default_env" =>
+                    { "adapter"  => "postgresql",
+                       "database" => "foo",
+                       "host"     => "localhost"
+                      }
+                    }
+        assert_equal expected, actual
+      end
+
+      def test_merge_no_conflicts_with_database_url
+        ENV['DATABASE_URL'] = "postgres://localhost/foo"
+
+        config   = {"default_env" => { "pool" => "5" } }
+        actual   = resolve_config(config)
+        expected = { "default_env" =>
+                     { "adapter"  => "postgresql",
+                       "database" => "foo",
+                       "host"     => "localhost",
+                       "pool"     => "5"
+                      }
+                    }
+        assert_equal expected, actual
+      end
+
+      def test_merge_conflicts_with_database_url
+        ENV['DATABASE_URL'] = "postgres://localhost/foo"
+
+        config   = {"default_env" => { "adapter" => "NOT-POSTGRES", "database" => "NOT-FOO", "pool" => "5" } }
+        actual   = resolve_config(config)
+        expected = { "default_env" =>
+                     { "adapter"  => "postgresql",
+                       "database" => "foo",
+                       "host"     => "localhost",
+                       "pool"     => "5"
+                      }
+                    }
+        assert_equal expected, actual
+      end
+    end
+  end
+end