require "helper"

module SQLite3
  class TestEncoding < SQLite3::TestCase
    def setup
      @db = SQLite3::Database.new(":memory:")
      @create = "create table ex(id int, data string)"
      @insert = "insert into ex(id, data) values (?, ?)"
      @db.execute(@create)
    end

    def teardown
      @db.close
    end

    def test_change_encoding
      db = SQLite3::Database.new(":memory:")
      assert_equal Encoding.find("UTF-8"), db.encoding

      db.execute "PRAGMA encoding='UTF-16le'"
      assert_equal Encoding.find("UTF-16le"), db.encoding
    end

    def test_encoding_when_results_are_hash
      db = SQLite3::Database.new(":memory:", results_as_hash: true)
      assert_equal Encoding.find("UTF-8"), db.encoding

      db = SQLite3::Database.new(":memory:")
      assert_equal Encoding.find("UTF-8"), db.encoding
    end

    def test_select_encoding_on_utf_16
      str = "foo"
      utf16 = ([1].pack("I") == [1].pack("N")) ? "UTF-16BE" : "UTF-16LE"
      db = SQLite3::Database.new(":memory:".encode(utf16))
      db.execute @create
      db.execute "insert into ex (id, data) values (1, \"#{str}\")"

      stmt = db.prepare "select * from ex where data = ?"
      ["US-ASCII", utf16, "EUC-JP", "UTF-8"].each do |enc|
        stmt.bind_param 1, str.encode(enc)
        assert_equal 1, stmt.to_a.length
        stmt.reset!
      end
      stmt.close
    end

    def test_insert_encoding
      str = "foo"
      utf16 = ([1].pack("I") == [1].pack("N")) ? "UTF-16BE" : "UTF-16LE"
      db = SQLite3::Database.new(":memory:".encode(utf16))
      db.execute @create
      stmt = db.prepare @insert

      ["US-ASCII", utf16, "EUC-JP", "UTF-8"].each_with_index do |enc, i|
        stmt.bind_param 1, i
        stmt.bind_param 2, str.encode(enc)
        stmt.to_a
        stmt.reset!
      end
      stmt.close

      db.execute("select data from ex").flatten.each do |s|
        assert_equal str, s
      end
    end

    def test_default_internal_is_honored
      warn_before = $-w
      $-w = false

      before_enc = Encoding.default_internal

      str = "壁に耳あり、障子に目あり"
      stmt = @db.prepare("insert into ex(data) values (?)")
      stmt.bind_param 1, str
      stmt.step
      stmt.close

      Encoding.default_internal = "EUC-JP"
      string = @db.execute("select data from ex").first.first

      assert_equal Encoding.default_internal, string.encoding
      assert_equal str.encode("EUC-JP"), string
      assert_equal str, string.encode(str.encoding)
    ensure
      Encoding.default_internal = before_enc
      $-w = warn_before
    end

    def test_blob_is_binary
      str = "猫舌"
      @db.execute("create table foo(data text)")
      stmt = @db.prepare("insert into foo(data) values (?)")
      stmt.bind_param(1, SQLite3::Blob.new(str))
      stmt.step
      stmt.close

      string = @db.execute("select data from foo").first.first
      assert_equal Encoding.find("ASCII-8BIT"), string.encoding
      assert_equal str, string.dup.force_encoding("UTF-8")
    end

    def test_blob_is_ascii8bit
      str = "猫舌"
      @db.execute("create table foo(data text)")
      stmt = @db.prepare("insert into foo(data) values (?)")
      stmt.bind_param(1, str.dup.force_encoding("ASCII-8BIT"))
      stmt.step
      stmt.close

      string = @db.execute("select data from foo").first.first
      assert_equal Encoding.find("ASCII-8BIT"), string.encoding
      assert_equal str, string.dup.force_encoding("UTF-8")
    end

    def test_blob_with_eucjp
      str = "猫舌".encode("EUC-JP")
      @db.execute("create table foo(data text)")
      stmt = @db.prepare("insert into foo(data) values (?)")
      stmt.bind_param(1, SQLite3::Blob.new(str))
      stmt.step
      stmt.close

      string = @db.execute("select data from foo").first.first
      assert_equal Encoding.find("ASCII-8BIT"), string.encoding
      assert_equal str, string.dup.force_encoding("EUC-JP")
    end

    def test_db_with_eucjp
      db = SQLite3::Database.new(":memory:".encode("EUC-JP"))
      assert_equal(Encoding.find("UTF-8"), db.encoding)
    end

    def test_db_with_utf16
      utf16 = ([1].pack("I") == [1].pack("N")) ? "UTF-16BE" : "UTF-16LE"

      db = SQLite3::Database.new(":memory:".encode(utf16))
      assert_equal(Encoding.find(utf16), db.encoding)
    end

    def test_statement_eucjp
      str = "猫舌"
      @db.execute("insert into ex(data) values ('#{str}')".encode("EUC-JP"))
      row = @db.execute("select data from ex")
      assert_equal @db.encoding, row.first.first.encoding
      assert_equal str, row.first.first
    end

    def test_statement_utf8
      str = "猫舌"
      @db.execute("insert into ex(data) values ('#{str}')")
      row = @db.execute("select data from ex")
      assert_equal @db.encoding, row.first.first.encoding
      assert_equal str, row.first.first
    end

    def test_encoding
      assert_equal Encoding.find("UTF-8"), @db.encoding
    end

    def test_utf_8
      str = "猫舌"
      @db.execute(@insert, [10, str])
      row = @db.execute("select data from ex")
      assert_equal @db.encoding, row.first.first.encoding
      assert_equal str, row.first.first
    end

    def test_euc_jp
      str = "猫舌".encode("EUC-JP")
      @db.execute(@insert, [10, str])
      row = @db.execute("select data from ex")
      assert_equal @db.encoding, row.first.first.encoding
      assert_equal str.encode("UTF-8"), row.first.first
    end
  end
end