| /* ==================================================================== |
| 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.poi.poifs.filesystem; |
| |
| import static org.junit.jupiter.api.Assertions.assertArrayEquals; |
| import static org.junit.jupiter.api.Assertions.assertDoesNotThrow; |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.stream.Stream; |
| |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.poi.util.IOUtils; |
| import org.junit.jupiter.api.Test; |
| import org.junit.jupiter.params.ParameterizedTest; |
| import org.junit.jupiter.params.provider.Arguments; |
| import org.junit.jupiter.params.provider.MethodSource; |
| |
| final class TestEmptyDocument { |
| private static final Logger LOG = LogManager.getLogger(TestEmptyDocument.class); |
| |
| private interface EmptyDoc { |
| void handle(DirectoryEntry dir) throws IOException; |
| } |
| |
| public static Stream<Arguments> emptySupplier() { |
| return Stream.of( |
| Arguments.of("SingleEmptyDocument", (EmptyDoc)TestEmptyDocument::SingleEmptyDocument), |
| Arguments.of("SingleEmptyDocumentEvent", (EmptyDoc)TestEmptyDocument::SingleEmptyDocumentEvent), |
| Arguments.of("EmptyDocumentWithFriend", (EmptyDoc)TestEmptyDocument::EmptyDocumentWithFriend), |
| Arguments.of("EmptyDocumentEventWithFriend", (EmptyDoc)TestEmptyDocument::EmptyDocumentEventWithFriend) |
| ); |
| } |
| |
| private static void SingleEmptyDocument(DirectoryEntry dir) throws IOException { |
| dir.createDocument("Foo", new ByteArrayInputStream(new byte[]{})); |
| } |
| |
| private static void SingleEmptyDocumentEvent(DirectoryEntry dir) throws IOException { |
| dir.createDocument("Foo", 0, event -> LOG.atWarn().log("written")); |
| } |
| |
| private static void EmptyDocumentWithFriend(DirectoryEntry dir) throws IOException { |
| dir.createDocument("Bar", new ByteArrayInputStream(new byte[]{0})); |
| dir.createDocument("Foo", new ByteArrayInputStream(new byte[]{})); |
| } |
| |
| private static void EmptyDocumentEventWithFriend(DirectoryEntry dir) throws IOException { |
| dir.createDocument("Bar", 1, event -> { |
| try { |
| event.getStream().write(0); |
| } catch (IOException exception) { |
| throw new RuntimeException("exception on write: " + exception); |
| } |
| }); |
| dir.createDocument("Foo", 0, event -> {}); |
| } |
| |
| |
| @ParameterizedTest(name = "{index} {0}") |
| @MethodSource("emptySupplier") |
| void testFoo(String testName, EmptyDoc emptyDoc) throws IOException { |
| try (POIFSFileSystem fs = new POIFSFileSystem()) { |
| DirectoryEntry dir = fs.getRoot(); |
| emptyDoc.handle(dir); |
| |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| fs.writeFilesystem(out); |
| assertDoesNotThrow(() -> new POIFSFileSystem(new ByteArrayInputStream(out.toByteArray()))); |
| } |
| } |
| |
| @Test |
| void testEmptyDocumentBug11744() throws Exception { |
| byte[] testData = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; |
| |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| try (POIFSFileSystem fs = new POIFSFileSystem()) { |
| fs.createDocument(new ByteArrayInputStream(new byte[0]), "Empty"); |
| fs.createDocument(new ByteArrayInputStream(testData), "NotEmpty"); |
| fs.writeFilesystem(out); |
| } |
| |
| // This line caused the error. |
| try (POIFSFileSystem fs = new POIFSFileSystem(new ByteArrayInputStream(out.toByteArray()))) { |
| DocumentEntry entry = (DocumentEntry) fs.getRoot().getEntry("Empty"); |
| assertEquals(0, entry.getSize(), "Expected zero size"); |
| byte[] actualReadbackData; |
| actualReadbackData = IOUtils.toByteArray(new DocumentInputStream(entry)); |
| assertEquals(0, actualReadbackData.length, "Expected zero read from stream"); |
| |
| entry = (DocumentEntry) fs.getRoot().getEntry("NotEmpty"); |
| actualReadbackData = IOUtils.toByteArray(new DocumentInputStream(entry)); |
| assertEquals(testData.length, entry.getSize(), "Expected size was wrong"); |
| assertArrayEquals(testData, actualReadbackData, "Expected same data read from stream"); |
| } |
| } |
| } |