Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/5580#discussion_r171175037
--- Diff:
flink-runtime/src/test/java/org/apache/flink/runtime/filecache/FileCacheReadsFromBlobTest.java
---
@@ -0,0 +1,140 @@
+/*
+ * 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.
+ */
+
+package org.apache.flink.runtime.filecache;
+
+import org.apache.flink.api.common.JobID;
+import org.apache.flink.api.common.cache.DistributedCache;
+import org.apache.flink.core.fs.Path;
+import org.apache.flink.runtime.blob.BlobServer;
+import org.apache.flink.runtime.blob.PermanentBlobKey;
+import org.apache.flink.runtime.blob.PermanentBlobService;
+import org.apache.flink.util.InstantiationUtil;
+
+import org.apache.flink.shaded.guava18.com.google.common.base.Charsets;
+import org.apache.flink.shaded.guava18.com.google.common.io.Files;
+
+import org.apache.commons.lang3.StringUtils;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.concurrent.Future;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests that {@link FileCache} can read files from {@link BlobServer}.
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class FileCacheReadsFromBlobTest {
+
+ private static final String testFileContent = "Goethe - Faust: Der
Tragoedie erster Teil\n" + "Prolog im Himmel.\n"
+ + "Der Herr. Die himmlischen Heerscharen. Nachher
Mephistopheles. Die drei\n" + "Erzengel treten vor.\n"
+ + "RAPHAEL: Die Sonne toent, nach alter Weise, In
Brudersphaeren Wettgesang,\n"
+ + "Und ihre vorgeschriebne Reise Vollendet sie mit Donnergang.
Ihr Anblick\n"
+ + "gibt den Engeln Staerke, Wenn keiner Sie ergruenden mag; die
unbegreiflich\n"
+ + "hohen Werke Sind herrlich wie am ersten Tag.\n"
+ + "GABRIEL: Und schnell und unbegreiflich schnelle Dreht sich
umher der Erde\n"
+ + "Pracht; Es wechselt Paradieseshelle Mit tiefer,
schauervoller Nacht. Es\n"
+ + "schaeumt das Meer in breiten Fluessen Am tiefen Grund der
Felsen auf, Und\n"
+ + "Fels und Meer wird fortgerissen Im ewig schnellem
Sphaerenlauf.\n"
+ + "MICHAEL: Und Stuerme brausen um die Wette Vom Meer aufs
Land, vom Land\n"
+ + "aufs Meer, und bilden wuetend eine Kette Der tiefsten
Wirkung rings umher.\n"
+ + "Da flammt ein blitzendes Verheeren Dem Pfade vor des
Donnerschlags. Doch\n"
+ + "deine Boten, Herr, verehren Das sanfte Wandeln deines Tags.";
+
+ @Rule
+ public final TemporaryFolder temporaryFolder = new TemporaryFolder();
+
+ private FileCache fileCache;
+
+ @Mock
+ private PermanentBlobService blobService;
+
+ @Before
+ public void setup() throws IOException {
+ try {
+ String[] tmpDirectories = new
String[]{temporaryFolder.newFolder().getAbsolutePath()};
+ fileCache = new FileCache(tmpDirectories, blobService);
+ } catch (Exception e) {
+ e.printStackTrace();
+ fail("Cannot create FileCache: " + e.getMessage());
+ }
+ }
+
+ @After
+ public void shutdown() {
+ try {
+ fileCache.shutdown();
+ } catch (Exception e) {
+ e.printStackTrace();
+ fail("FileCache shutdown failed: " + e.getMessage());
+ }
+ }
+
+ @Test
+ public void testFileDownloadedFromBlob() {
+ try {
+ JobID jobID = new JobID();
+
+ final PermanentBlobKey permanentBlobKey = new
PermanentBlobKey();
+ when(blobService.getFile(jobID,
permanentBlobKey)).thenAnswer(inv -> {
+ File f =
temporaryFolder.newFile("cacheFile");
+ try {
+ Files.write(testFileContent, f,
Charsets.UTF_8);
--- End diff --
use `FileUtils#writeFileUtf8` instead
---
