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common-fs2: File sink should rotate files with maximum size (close #440)
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107 changes: 107 additions & 0 deletions
107
...mon-fs2/src/test/scala/com/snowplowanalytics/snowplow/enrich/common/fs2/io/SinkSpec.scala
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| /* | ||
| * Copyright (c) 2021 Snowplow Analytics Ltd. All rights reserved. | ||
| * | ||
| * This program is licensed to you under the Apache License Version 2.0, | ||
| * and you may not use this file except in compliance with the Apache License Version 2.0. | ||
| * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0. | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the Apache License Version 2.0 is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under. | ||
| */ | ||
| package com.snowplowanalytics.snowplow.enrich.common.fs2.io | ||
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| import cats.implicits._ | ||
| import cats.effect.{Blocker, IO} | ||
| import cats.effect.testing.specs2.CatsIO | ||
| import java.nio.file.{Files, Path} | ||
| import scala.concurrent.ExecutionContext | ||
| import scala.jdk.CollectionConverters._ | ||
| import scala.io.{Source => ScalaSource} | ||
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| import org.specs2.mutable.Specification | ||
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| class SinkSpec extends Specification with CatsIO { | ||
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| "rotating file sink" should { | ||
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| "write to a single file if max bytes is not exceeded" in { | ||
| val dir = Files.createTempDirectory("enrich-sink-spec") | ||
| val blocker = Blocker.liftExecutionContext(ExecutionContext.global) | ||
| val maxBytes = 100L | ||
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| val write = Sink.rotatingFileSink[IO](dir.resolve("out"), maxBytes, blocker).use { sink => | ||
| for { | ||
| _ <- sink("AAAAA".getBytes) | ||
| _ <- sink("BBBBB".getBytes) | ||
| _ <- sink("CCCCC".getBytes) | ||
| } yield () | ||
| } | ||
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| for { | ||
| _ <- write | ||
| written <- filesInDir(dir) | ||
| withContent <- zipWithContent(written) | ||
| } yield { | ||
| withContent must have size 1 | ||
| val (path, content) = withContent.head | ||
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| path.getFileName.toString must be_==("out.0001") | ||
| content must_== (List("AAAAA", "BBBBB", "CCCCC")) | ||
| } | ||
| } | ||
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| "rotate files when max bytes is exceeded" in { | ||
| val dir = Files.createTempDirectory("enrich-sink-spec") | ||
| val blocker = Blocker.liftExecutionContext(ExecutionContext.global) | ||
| val maxBytes = 15L | ||
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| val write = Sink.rotatingFileSink[IO](dir.resolve("out"), maxBytes, blocker).use { sink => | ||
| for { | ||
| _ <- sink("AAAAA".getBytes) | ||
| _ <- sink("BBBBB".getBytes) | ||
| _ <- sink("CCCCC".getBytes) | ||
| _ <- sink("DDDDD".getBytes) | ||
| _ <- sink("EEEEE".getBytes) | ||
| } yield () | ||
| } | ||
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| for { | ||
| _ <- write | ||
| written <- filesInDir(dir) | ||
| withContent <- zipWithContent(written) | ||
| } yield { | ||
| withContent must have size 3 | ||
| written.map(_.getFileName.toString) must_== (List("out.0001", "out.0002", "out.0003")) | ||
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| withContent.map(_._2) must_== (List( | ||
| List("AAAAA", "BBBBB"), | ||
| List("CCCCC", "DDDDD"), | ||
| List("EEEEE") | ||
| )) | ||
| } | ||
| } | ||
| } | ||
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| def filesInDir(dir: Path): IO[List[Path]] = | ||
| IO.delay { | ||
| Files.list(dir) | ||
| }.bracket { stream => | ||
| IO.delay(stream.iterator.asScala.toList) | ||
| } { stream => | ||
| IO.delay(stream.close()) | ||
| }.map(_.sorted) | ||
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| def zipWithContent(files: List[Path]): IO[List[(Path, List[String])]] = | ||
| files.traverse { path => | ||
| IO.delay { | ||
| ScalaSource.fromFile(path.toFile) | ||
| }.bracket { source => | ||
| IO.delay(source.getLines().toList).map(lines => path -> lines) | ||
| } { source => | ||
| IO.delay(source.close()) | ||
| } | ||
| } | ||
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| } |