tests/testthat/test-message.R

In arrow: Integration to 'Apache' 'Arrow'

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test_that("read_message can read from input stream", {
  batch <- record_batch(x = 1:10)
  bytes <- batch$serialize()
  stream <- BufferReader$create(bytes)

  message <- read_message(stream)
  expect_r6_class(message, "Message")
  expect_equal(message$type, MessageType$RECORD_BATCH)
  expect_r6_class(message$body, "Buffer")
  expect_r6_class(message$metadata, "Buffer")

  message <- read_message(stream)
  expect_null(read_message(stream))
})

test_that("read_message() can read Schema messages", {
  bytes <- schema(x = int32())$serialize()
  stream <- BufferReader$create(bytes)
  message <- read_message(stream)

  expect_r6_class(message, "Message")
  expect_equal(message$type, MessageType$SCHEMA)
  expect_r6_class(message$body, "Buffer")
  expect_r6_class(message$metadata, "Buffer")

  message <- read_message(stream)
  expect_null(read_message(stream))
})

test_that("read_message() can handle raw vectors", {
  batch <- record_batch(x = 1:10)
  bytes <- batch$serialize()
  stream <- BufferReader$create(bytes)

  message_stream <- read_message(stream)
  message_raw <- read_message(bytes)
  expect_equal(message_stream, message_raw)

  bytes <- schema(x = int32())$serialize()
  stream <- BufferReader$create(bytes)
  message_stream <- read_message(stream)
  message_raw <- read_message(bytes)

  expect_equal(message_stream, message_raw)
})