test_that("inflate", {
  data_gz <- as.raw(c(
      0x78, 0x9c, 0xa5, 0xcc, 0x4d, 0x0a, 0x83, 0x30, 0x10,
      0x40, 0xe1, 0x7d, 0x4e, 0x31, 0xfb, 0x82, 0x4c, 0xfe, 0x34, 0x42,
      0x29, 0xa5, 0x2e, 0xba, 0xef, 0x0d, 0xc6, 0x64, 0x62, 0x85, 0x46,
      0x25, 0xc6, 0xde, 0xc7, 0xb3, 0x78, 0xb1, 0x7a, 0x87, 0xae, 0x1e,
      0x7c, 0x8b, 0x57, 0x32, 0x33, 0x38, 0x6e, 0x94, 0x37, 0x9e, 0x6a,
      0xe7, 0xb1, 0xb5, 0x68, 0x75, 0xaf, 0xbc, 0x0a, 0x3d, 0xa3, 0x8b,
      0x8d, 0x6a, 0x49, 0x6b, 0xa4, 0x28, 0x23, 0x93, 0x58, 0x28, 0xf3,
      0x54, 0x20, 0x44, 0x43, 0xca, 0xd5, 0xc6, 0xb4, 0x88, 0x36, 0x78,
      0xe4, 0x68, 0x0d, 0x73, 0x4d, 0xec, 0x90, 0x42, 0xb4, 0x51, 0x9a,
      0x80, 0xec, 0x83, 0x16, 0xb4, 0x95, 0xf7, 0x9c, 0xe1, 0x79, 0xec,
      0xfd, 0x99, 0x6e, 0x3d, 0xf6, 0x1c, 0x46, 0xb8, 0xfa, 0x95, 0xce,
      0x56, 0x03, 0x9d, 0x7a, 0x1f, 0x12, 0x8d, 0x9f, 0xca, 0xcf, 0xe9,
      0x06, 0xb2, 0x6e, 0xa4, 0x6a, 0x14, 0x6a, 0x84, 0x0b, 0x4a, 0x44,
      0x71, 0x6a, 0x1a, 0x4b, 0xe1, 0x3f, 0x16, 0xe2, 0xb1, 0xa5, 0x05,
      0xca, 0x0c, 0xaf, 0x0e, 0xbe, 0x9c, 0xd7, 0x71, 0x9e, 0xc4, 0x0f,
      0x2b, 0x30, 0x4d, 0xe3, 0xa0, 0x31, 0x78, 0x9c, 0x33, 0x34, 0x30,
      0x30, 0x33, 0x31, 0x51, 0xd0, 0x0b, 0x4a, 0x2a, 0xcd, 0xcc, 0x49,
      0xc9, 0x4c, 0xcf, 0xcb, 0x2f, 0x4a, 0x65, 0xa8, 0x48, 0xae, 0x29,
      0x77, 0xfc, 0x78, 0x21
  ))

  data <- inflate(data_gz, 1L, 245L)
  out <- rawToChar(data$output)
  Encoding(out) <- "UTF-8"
  if (l10n_info()[["UTF-8"]]) {
    variant <- "utf8"
  } else {
    out <- iconv(out, "UTF-8", "ASCII", sub = "byte")
    variant <- "ascii"
  }
  expect_snapshot(
    cat(out),
    variant = variant
  )

  # buffer is resized
  expect_silent(inflate(data_gz, 1L, 200L))

  # bad format
  expect_error(inflate(data_gz, 10L, 300L))
})

test_that("deflate", {
  data_gz <- deflate(charToRaw("Hello world!"))
  data <- inflate(data_gz$output)
  expect_equal(data_gz$bytes_written, data$bytes_read)
  expect_equal(data_gz$bytes_read, data$bytes_written)
  expect_snapshot(rawToChar(data$output))

  # output is resized
  data_gz_2 <- deflate(charToRaw("Hello world!"), size = 5)
  expect_equal(data_gz, data_gz_2)
  data_gz_3 <- deflate(charToRaw("Hello world!"), size = 500)
  expect_equal(data_gz, data_gz_3)
})