1 files changed, 404 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapter_test.rb b/activerecord/test/cases/adapter_test.rb
new file mode 100644
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+++ b/activerecord/test/cases/adapter_test.rb
@@ -0,0 +1,404 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "models/book"
+require "models/post"
+require "models/author"
+require "models/event"
+
+module ActiveRecord
+  class AdapterTest < ActiveRecord::TestCase
+    def setup
+      @connection = ActiveRecord::Base.connection
+    end
+
+    ##
+    # PostgreSQL does not support null bytes in strings
+    unless current_adapter?(:PostgreSQLAdapter) ||
+        (current_adapter?(:SQLite3Adapter) && !ActiveRecord::Base.connection.prepared_statements)
+      def test_update_prepared_statement
+        b = Book.create(name: "my \x00 book")
+        b.reload
+        assert_equal "my \x00 book", b.name
+        b.update(name: "my other \x00 book")
+        b.reload
+        assert_equal "my other \x00 book", b.name
+      end
+    end
+
+    def test_create_record_with_pk_as_zero
+      Book.create(id: 0)
+      assert_equal 0, Book.find(0).id
+      assert_nothing_raised { Book.destroy(0) }
+    end
+
+    def test_valid_column
+      @connection.native_database_types.each_key do |type|
+        assert @connection.valid_type?(type)
+      end
+    end
+
+    def test_invalid_column
+      assert_not @connection.valid_type?(:foobar)
+    end
+
+    def test_tables
+      tables = @connection.tables
+      assert_includes tables, "accounts"
+      assert_includes tables, "authors"
+      assert_includes tables, "tasks"
+      assert_includes tables, "topics"
+    end
+
+    def test_table_exists?
+      assert @connection.table_exists?("accounts")
+      assert @connection.table_exists?(:accounts)
+      assert_not @connection.table_exists?("nonexistingtable")
+      assert_not @connection.table_exists?("'")
+      assert_not @connection.table_exists?(nil)
+    end
+
+    def test_data_sources
+      data_sources = @connection.data_sources
+      assert_includes data_sources, "accounts"
+      assert_includes data_sources, "authors"
+      assert_includes data_sources, "tasks"
+      assert_includes data_sources, "topics"
+    end
+
+    def test_data_source_exists?
+      assert @connection.data_source_exists?("accounts")
+      assert @connection.data_source_exists?(:accounts)
+      assert_not @connection.data_source_exists?("nonexistingtable")
+      assert_not @connection.data_source_exists?("'")
+      assert_not @connection.data_source_exists?(nil)
+    end
+
+    def test_indexes
+      idx_name = "accounts_idx"
+
+      indexes = @connection.indexes("accounts")
+      assert_empty indexes
+
+      @connection.add_index :accounts, :firm_id, name: idx_name
+      indexes = @connection.indexes("accounts")
+      assert_equal "accounts", indexes.first.table
+      assert_equal idx_name, indexes.first.name
+      assert !indexes.first.unique
+      assert_equal ["firm_id"], indexes.first.columns
+    ensure
+      @connection.remove_index(:accounts, name: idx_name) rescue nil
+    end
+
+    def test_remove_index_when_name_and_wrong_column_name_specified
+      index_name = "accounts_idx"
+
+      @connection.add_index :accounts, :firm_id, name: index_name
+      assert_raises ArgumentError do
+        @connection.remove_index :accounts, name: index_name, column: :wrong_column_name
+      end
+    ensure
+      @connection.remove_index(:accounts, name: index_name)
+    end
+
+    def test_current_database
+      if @connection.respond_to?(:current_database)
+        assert_equal ARTest.connection_config["arunit"]["database"], @connection.current_database
+      end
+    end
+
+    if current_adapter?(:Mysql2Adapter)
+      def test_charset
+        assert_not_nil @connection.charset
+        assert_not_equal "character_set_database", @connection.charset
+        assert_equal @connection.show_variable("character_set_database"), @connection.charset
+      end
+
+      def test_collation
+        assert_not_nil @connection.collation
+        assert_not_equal "collation_database", @connection.collation
+        assert_equal @connection.show_variable("collation_database"), @connection.collation
+      end
+
+      def test_show_nonexistent_variable_returns_nil
+        assert_nil @connection.show_variable("foo_bar_baz")
+      end
+
+      def test_not_specifying_database_name_for_cross_database_selects
+        begin
+          assert_nothing_raised do
+            ActiveRecord::Base.establish_connection(ActiveRecord::Base.configurations["arunit"].except(:database))
+
+            config = ARTest.connection_config
+            ActiveRecord::Base.connection.execute(
+              "SELECT #{config['arunit']['database']}.pirates.*, #{config['arunit2']['database']}.courses.* " \
+              "FROM #{config['arunit']['database']}.pirates, #{config['arunit2']['database']}.courses"
+            )
+          end
+        ensure
+          ActiveRecord::Base.establish_connection :arunit
+        end
+      end
+    end
+
+    def test_table_alias
+      def @connection.test_table_alias_length() 10; end
+      class << @connection
+        alias_method :old_table_alias_length, :table_alias_length
+        alias_method :table_alias_length,     :test_table_alias_length
+      end
+
+      assert_equal "posts",      @connection.table_alias_for("posts")
+      assert_equal "posts_comm", @connection.table_alias_for("posts_comments")
+      assert_equal "dbo_posts",  @connection.table_alias_for("dbo.posts")
+
+      class << @connection
+        remove_method :table_alias_length
+        alias_method :table_alias_length, :old_table_alias_length
+      end
+    end
+
+    def test_uniqueness_violations_are_translated_to_specific_exception
+      @connection.execute "INSERT INTO subscribers(nick) VALUES('me')"
+      error = assert_raises(ActiveRecord::RecordNotUnique) do
+        @connection.execute "INSERT INTO subscribers(nick) VALUES('me')"
+      end
+
+      assert_not_nil error.cause
+    end
+
+    def test_not_null_violations_are_translated_to_specific_exception
+      error = assert_raises(ActiveRecord::NotNullViolation) do
+        Post.create
+      end
+
+      assert_not_nil error.cause
+    end
+
+    unless current_adapter?(:SQLite3Adapter)
+      def test_value_limit_violations_are_translated_to_specific_exception
+        error = assert_raises(ActiveRecord::ValueTooLong) do
+          Event.create(title: "abcdefgh")
+        end
+
+        assert_not_nil error.cause
+      end
+
+      def test_numeric_value_out_of_ranges_are_translated_to_specific_exception
+        error = assert_raises(ActiveRecord::RangeError) do
+          Book.connection.create("INSERT INTO books(author_id) VALUES (9223372036854775808)")
+        end
+
+        assert_not_nil error.cause
+      end
+    end
+
+    def test_exceptions_from_notifications_are_not_translated
+      original_error = StandardError.new("This StandardError shouldn't get translated")
+      subscriber = ActiveSupport::Notifications.subscribe("sql.active_record") { raise original_error }
+      actual_error = assert_raises(StandardError) do
+        @connection.execute("SELECT * FROM posts")
+      end
+
+      assert_equal original_error, actual_error
+
+    ensure
+      ActiveSupport::Notifications.unsubscribe(subscriber) if subscriber
+    end
+
+    def test_database_related_exceptions_are_translated_to_statement_invalid
+      error = assert_raises(ActiveRecord::StatementInvalid) do
+        @connection.execute("This is a syntax error")
+      end
+
+      assert_instance_of ActiveRecord::StatementInvalid, error
+      assert_kind_of Exception, error.cause
+    end
+
+    def test_select_all_always_return_activerecord_result
+      result = @connection.select_all "SELECT * FROM posts"
+      assert result.is_a?(ActiveRecord::Result)
+    end
+
+    if ActiveRecord::Base.connection.prepared_statements
+      def test_select_all_with_legacy_binds
+        post = Post.create!(title: "foo", body: "bar")
+        expected = @connection.select_all("SELECT * FROM posts WHERE id = #{post.id}")
+        result = @connection.select_all("SELECT * FROM posts WHERE id = #{Arel::Nodes::BindParam.new(nil).to_sql}", nil, [[nil, post.id]])
+        assert_equal expected.to_hash, result.to_hash
+      end
+
+      def test_insert_update_delete_with_legacy_binds
+        binds = [[nil, 1]]
+        bind_param = Arel::Nodes::BindParam.new(nil)
+
+        id = @connection.insert("INSERT INTO events(id) VALUES (#{bind_param.to_sql})", nil, nil, nil, nil, binds)
+        assert_equal 1, id
+
+        @connection.update("UPDATE events SET title = 'foo' WHERE id = #{bind_param.to_sql}", nil, binds)
+        result = @connection.select_all("SELECT * FROM events WHERE id = #{bind_param.to_sql}", nil, binds)
+        assert_equal({ "id" => 1, "title" => "foo" }, result.first)
+
+        @connection.delete("DELETE FROM events WHERE id = #{bind_param.to_sql}", nil, binds)
+        result = @connection.select_all("SELECT * FROM events WHERE id = #{bind_param.to_sql}", nil, binds)
+        assert_nil result.first
+      end
+
+      def test_insert_update_delete_with_binds
+        binds = [Relation::QueryAttribute.new("id", 1, Type.default_value)]
+        bind_param = Arel::Nodes::BindParam.new(nil)
+
+        id = @connection.insert("INSERT INTO events(id) VALUES (#{bind_param.to_sql})", nil, nil, nil, nil, binds)
+        assert_equal 1, id
+
+        @connection.update("UPDATE events SET title = 'foo' WHERE id = #{bind_param.to_sql}", nil, binds)
+        result = @connection.select_all("SELECT * FROM events WHERE id = #{bind_param.to_sql}", nil, binds)
+        assert_equal({ "id" => 1, "title" => "foo" }, result.first)
+
+        @connection.delete("DELETE FROM events WHERE id = #{bind_param.to_sql}", nil, binds)
+        result = @connection.select_all("SELECT * FROM events WHERE id = #{bind_param.to_sql}", nil, binds)
+        assert_nil result.first
+      end
+    end
+
+    def test_select_methods_passing_a_association_relation
+      author = Author.create!(name: "john")
+      Post.create!(author: author, title: "foo", body: "bar")
+      query = author.posts.where(title: "foo").select(:title)
+      assert_equal({ "title" => "foo" }, @connection.select_one(query))
+      assert @connection.select_all(query).is_a?(ActiveRecord::Result)
+      assert_equal "foo", @connection.select_value(query)
+      assert_equal ["foo"], @connection.select_values(query)
+    end
+
+    def test_select_methods_passing_a_relation
+      Post.create!(title: "foo", body: "bar")
+      query = Post.where(title: "foo").select(:title)
+      assert_equal({ "title" => "foo" }, @connection.select_one(query))
+      assert @connection.select_all(query).is_a?(ActiveRecord::Result)
+      assert_equal "foo", @connection.select_value(query)
+      assert_equal ["foo"], @connection.select_values(query)
+    end
+
+    test "type_to_sql returns a String for unmapped types" do
+      assert_equal "special_db_type", @connection.type_to_sql(:special_db_type)
+    end
+
+    unless current_adapter?(:PostgreSQLAdapter)
+      def test_log_invalid_encoding
+        error = assert_raises RuntimeError do
+          @connection.send :log, "SELECT 'ы' FROM DUAL" do
+            raise "ы".dup.force_encoding(Encoding::ASCII_8BIT)
+          end
+        end
+
+        assert_equal "ы", error.message
+      end
+    end
+  end
+
+  class AdapterForeignKeyTest < ActiveRecord::TestCase
+    self.use_transactional_tests = false
+
+    def setup
+      @connection = ActiveRecord::Base.connection
+    end
+
+    def test_foreign_key_violations_are_translated_to_specific_exception_with_validate_false
+      klass_has_fk = Class.new(ActiveRecord::Base) do
+        self.table_name = "fk_test_has_fk"
+      end
+
+      error = assert_raises(ActiveRecord::InvalidForeignKey) do
+        has_fk = klass_has_fk.new
+        has_fk.fk_id = 1231231231
+        has_fk.save(validate: false)
+      end
+
+      assert_not_nil error.cause
+    end
+
+    def test_foreign_key_violations_are_translated_to_specific_exception
+      error = assert_raises(ActiveRecord::InvalidForeignKey) do
+        insert_into_fk_test_has_fk
+      end
+
+      assert_not_nil error.cause
+    end
+
+    def test_disable_referential_integrity
+      assert_nothing_raised do
+        @connection.disable_referential_integrity do
+          insert_into_fk_test_has_fk
+          # should delete created record as otherwise disable_referential_integrity will try to enable constraints
+          # after executed block and will fail (at least on Oracle)
+          @connection.execute "DELETE FROM fk_test_has_fk"
+        end
+      end
+    end
+
+    private
+
+      def insert_into_fk_test_has_fk
+        # Oracle adapter uses prefetched primary key values from sequence and passes them to connection adapter insert method
+        if @connection.prefetch_primary_key?
+          id_value = @connection.next_sequence_value(@connection.default_sequence_name("fk_test_has_fk", "id"))
+          @connection.execute "INSERT INTO fk_test_has_fk (id,fk_id) VALUES (#{id_value},0)"
+        else
+          @connection.execute "INSERT INTO fk_test_has_fk (fk_id) VALUES (0)"
+        end
+      end
+  end
+
+  class AdapterTestWithoutTransaction < ActiveRecord::TestCase
+    self.use_transactional_tests = false
+
+    class Klass < ActiveRecord::Base
+    end
+
+    def setup
+      Klass.establish_connection :arunit
+      @connection = Klass.connection
+    end
+
+    teardown do
+      Klass.remove_connection
+    end
+
+    unless in_memory_db?
+      test "transaction state is reset after a reconnect" do
+        @connection.begin_transaction
+        assert_predicate @connection, :transaction_open?
+        @connection.reconnect!
+        assert_not_predicate @connection, :transaction_open?
+      end
+
+      test "transaction state is reset after a disconnect" do
+        @connection.begin_transaction
+        assert_predicate @connection, :transaction_open?
+        @connection.disconnect!
+        assert_not_predicate @connection, :transaction_open?
+      end
+    end
+
+    # test resetting sequences in odd tables in PostgreSQL
+    if ActiveRecord::Base.connection.respond_to?(:reset_pk_sequence!)
+      require "models/movie"
+      require "models/subscriber"
+
+      def test_reset_empty_table_with_custom_pk
+        Movie.delete_all
+        Movie.connection.reset_pk_sequence! "movies"
+        assert_equal 1, Movie.create(name: "fight club").id
+      end
+
+      def test_reset_table_with_non_integer_pk
+        Subscriber.delete_all
+        Subscriber.connection.reset_pk_sequence! "subscribers"
+        sub = Subscriber.new(name: "robert drake")
+        sub.id = "bob drake"
+        assert_nothing_raised { sub.save! }
+      end
+    end
+  end
+end