1 files changed, 29 insertions, 0 deletions
diff --git a/src/arrow/r/tests/testthat/helper-parquet.R b/src/arrow/r/tests/testthat/helper-parquet.R
new file mode 100644
index 000000000..a0dd445bb
--- /dev/null
+++ b/src/arrow/r/tests/testthat/helper-parquet.R
@@ -0,0 +1,29 @@
+# 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.
+
+expect_parquet_roundtrip <- function(tab, ...) {
+  expect_equal(parquet_roundtrip(tab, ...), tab)
+}
+
+parquet_roundtrip <- function(x, ..., as_data_frame = FALSE) {
+  # write/read parquet, returns Table
+  tf <- tempfile()
+  on.exit(unlink(tf))
+
+  write_parquet(x, tf, ...)
+  read_parquet(tf, as_data_frame = as_data_frame)
+}