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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
test_that("install_pyarrow", {
skip_on_cran()
skip_if_offline()
skip_if_not_dev_mode()
# Windows CI machine doesn't pick up the right python or something
skip_on_os("windows")
skip_if_not_installed("reticulate")
# PyArrow doesn't support Python 3.9 or earlier
skip_on_python_older_than("3.10")
# no pyarrow wheels for macos 10.13
skip_if(on_macos_10_13_or_lower())
venv <- try(reticulate::virtualenv_create("arrow-test"))
# Bail out if virtualenv isn't available
skip_if(inherits(venv, "try-error"))
expect_error(install_pyarrow("arrow-test", nightly = TRUE), NA)
# Set this up for the following tests
reticulate::use_virtualenv("arrow-test")
})
skip_if_no_pyarrow()
test_that("Array from Python", {
pa <- reticulate::import("pyarrow")
py <- pa$array(c(1, 2, 3))
expect_equal(py, Array$create(c(1, 2, 3)))
expect_equal(as_arrow_array(py), Array$create(c(1, 2, 3)))
})
test_that("Array to Python", {
pa <- reticulate::import("pyarrow", convert = FALSE)
r <- Array$create(c(1, 2, 3))
py <- pa$concat_arrays(list(r))
expect_s3_class(py, "pyarrow.lib.Array")
expect_equal(reticulate::py_to_r(py), r)
})
test_that("RecordBatch to/from Python", {
pa <- reticulate::import("pyarrow", convert = FALSE)
batch <- record_batch(col1 = c(1, 2, 3), col2 = letters[1:3])
py <- reticulate::r_to_py(batch)
expect_s3_class(py, "pyarrow.lib.RecordBatch")
expect_equal(reticulate::py_to_r(py), batch)
expect_equal(as_record_batch(py), batch)
expect_equal(as_arrow_table(py), as_arrow_table(batch))
reader <- as_record_batch_reader(py)
expect_equal(reader$read_next_batch(), batch)
})
test_that("Table and ChunkedArray from Python", {
pa <- reticulate::import("pyarrow", convert = FALSE)
batch <- record_batch(col1 = c(1, 2, 3), col2 = letters[1:3])
tab <- Table$create(batch, batch)
pybatch <- reticulate::r_to_py(batch)
pytab <- pa$Table$from_batches(list(pybatch, pybatch))
expect_s3_class(pytab, "pyarrow.lib.Table")
expect_s3_class(pytab[0], "pyarrow.lib.ChunkedArray")
expect_equal(reticulate::py_to_r(pytab[0]), tab$col1)
expect_equal(reticulate::py_to_r(pytab), tab)
expect_equal(as_arrow_table(pytab), tab)
expect_equal(as_record_batch(pytab), as_record_batch(tab))
reader <- as_record_batch_reader(pytab)
expect_equal(reader$read_table(), tab)
})
test_that("Table and ChunkedArray to Python", {
batch <- record_batch(col1 = c(1, 2, 3), col2 = letters[1:3])
tab <- Table$create(batch, batch)
pychunked <- reticulate::r_to_py(tab$col1)
expect_s3_class(pychunked, "pyarrow.lib.ChunkedArray")
expect_equal(reticulate::py_to_r(pychunked), tab$col1)
pytab <- reticulate::r_to_py(tab)
expect_s3_class(pytab, "pyarrow.lib.Table")
expect_equal(reticulate::py_to_r(pytab), tab)
})
test_that("RecordBatch with metadata roundtrip", {
batch <- RecordBatch$create(example_with_metadata)
pybatch <- reticulate::r_to_py(batch)
expect_s3_class(pybatch, "pyarrow.lib.RecordBatch")
# Because batch$a is VctrsExtensionType, (which pyarrow doesn't know
# about) we don't quite have equality; however, we still have the
# ability to roundtrip preserving the extension type.
rbatch <- reticulate::py_to_r(pybatch)
expect_identical(rbatch$metadata, batch$metadata)
expect_equal(rbatch$a, batch$a)
expect_equal(rbatch[c("b", "c", "d")], batch[c("b", "c", "d")])
expect_equal_data_frame(rbatch, example_with_metadata)
})
test_that("Table with metadata roundtrip", {
tab <- Table$create(example_with_metadata)
pytab <- reticulate::r_to_py(tab)
expect_s3_class(pytab, "pyarrow.lib.Table")
# Because tab$a is VctrsExtensionType, (which pyarrow doesn't know
# about) we don't quite have equality; however, we still have the
# ability to roundtrip preserving the extension type.
rtab <- reticulate::py_to_r(pytab)
expect_identical(rtab$metadata, tab$metadata)
expect_equal(rtab$a, tab$a)
expect_equal(rtab[c("b", "c", "d")], tab[c("b", "c", "d")])
expect_equal_data_frame(rtab, example_with_metadata)
})
test_that("DataType roundtrip", {
r <- timestamp("ms", timezone = "Pacific/Marquesas")
py <- reticulate::r_to_py(r)
expect_s3_class(py, "pyarrow.lib.DataType")
expect_equal(reticulate::py_to_r(py), r)
expect_equal(as_data_type(py), r)
})
test_that("Field roundtrip", {
r <- field("x", time32("s"))
py <- reticulate::r_to_py(r)
expect_s3_class(py, "pyarrow.lib.Field")
expect_equal(reticulate::py_to_r(py), r)
expect_equal(as_data_type(py), as_data_type(r))
})
test_that("RecordBatchReader to python", {
skip_if_not_available("dataset")
library(dplyr, warn.conflicts = FALSE)
tab <- Table$create(example_data)
scan <- tab |>
select(int, lgl) |>
filter(int > 6) |>
Scanner$create()
reader <- scan$ToRecordBatchReader()
pyreader <- reticulate::r_to_py(reader)
expect_s3_class(pyreader, "pyarrow.lib.RecordBatchReader")
pytab <- pyreader$read_all()
expect_s3_class(pytab, "pyarrow.lib.Table")
back_to_r <- reticulate::py_to_r(pytab)
expect_r6_class(back_to_r, "Table")
expect_equal_data_frame(
back_to_r,
example_data |>
select(int, lgl) |>
filter(int > 6)
)
})
test_that("RecordBatchReader from python", {
skip_if_not_available("dataset")
tab <- Table$create(example_data)
scan <- Scanner$create(tab)
reader <- scan$ToRecordBatchReader()
pyreader <- reticulate::r_to_py(reader)
back_to_r <- reticulate::py_to_r(pyreader)
rt_table <- back_to_r$read_table()
expect_r6_class(rt_table, "Table")
expect_equal_data_frame(rt_table, example_data)
scan <- Scanner$create(tab)
reader <- scan$ToRecordBatchReader()
pyreader <- reticulate::r_to_py(reader)
back_to_r <- as_record_batch_reader(pyreader)
expect_equal(back_to_r$read_table(), rt_table)
})
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