Support parsing audio URLs without file extension

Added also a Junit for the audio tag parser

test/java/net/yacy/document/parser/audioTagParserTest.java

@@ -0,0 +1,142 @@
+// audioTagParserTest.java
+// ---------------------------
+// Copyright 2019 by luccioman; https://github.com/luccioman
+//
+// This is a part of YaCy, a peer-to-peer based web search engine
+//
+// LICENSE
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+package net.yacy.document.parser;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.Collection;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import net.yacy.cora.document.id.AnchorURL;
+import net.yacy.cora.document.id.DigestURL;
+import net.yacy.document.Document;
+import net.yacy.document.Parser.Failure;
+import net.yacy.document.VocabularyScraper;
+
+/**
+ * Unit tests for the {@link audioTagParser} class
+ * 
+ */
+public class audioTagParserTest {
+
+	/** Folder containing test files */
+	private static final File TEST_FOLDER = new File("test", "parsertest");
+
+	/** The parser under test */
+	private audioTagParser parser;
+
+	@Before
+	public void before() {
+		this.parser = new audioTagParser();
+	}
+
+	/**
+	 * Unit test for the
+	 * {@link audioTagParser#parse(DigestURL, String, String, VocabularyScraper, int, java.io.InputStream)}
+	 * function with some small (1 second length) test files.
+	 * 
+	 * @throws Failure              when a file could not be parsed
+	 * @throws InterruptedException when the test was interrupted before its
+	 *                              termination
+	 * @throws IOException          when a read/write error occurred
+	 */
+	@Test
+	public void testParse() throws Failure, InterruptedException, IOException {
+		final String[] fileNames = { "umlaute_windows.aiff", "umlaute_windows.flac", "umlaute_windows.m4a",
+				"umlaute_windows.mp3", "umlaute_windows.ogg", "umlaute_windows.wav" };
+
+		for (final String fileName : fileNames) {
+			final DigestURL location = new DigestURL("http://localhost/" + fileName);
+			try (final FileInputStream inStream = new FileInputStream(new File(TEST_FOLDER, fileName));) {
+				final Document[] documents = this.parser.parse(location, "audio/ogg", StandardCharsets.UTF_8.name(),
+						new VocabularyScraper(), 0, inStream);
+				assertNotNull("Parser result must not be null for file " + fileName, documents);
+				assertNotNull("Parsed text must not be empty for file " + fileName, documents[0].getTextString());
+				assertTrue("Parsed text must contain test word with umlaut char" + fileName,
+						documents[0].getTextString().contains("Maßkrügen"));
+				final Collection<AnchorURL> anchors = documents[0].getAnchors();
+				assertNotNull("Detected URLS must not be null for file " + fileName, anchors);
+				assertEquals("One URL must have been detected for file " + fileName, 1, anchors.size());
+				assertTrue(anchors.iterator().next().toString().equals("https://yacy.net/"));
+			}
+		}
+	}
+
+	/**
+	 * Test support for parsing audio document with proper Media Type but without
+	 * extension or unrelated extension in its file name.
+	 * 
+	 * @throws Failure              when the file could not be parsed
+	 * @throws InterruptedException when the test was interrupted before its
+	 *                              termination
+	 * @throws IOException          when a read/write error occurred
+	 */
+	@Test
+	public void testParseDocUrlWithoutFileExt() throws Failure, InterruptedException, IOException {
+		final String testFileName = "umlaute_windows.ogg";
+		final String[] locations = { "http://localhost/audioTrack", "http://localhost/example.audio" };
+
+		for (final String locationStr : locations) {
+			final DigestURL location = new DigestURL(locationStr);
+			try (final FileInputStream inStream = new FileInputStream(new File(TEST_FOLDER, testFileName));) {
+				final Document[] documents = this.parser.parse(location, "audio/ogg", StandardCharsets.UTF_8.name(),
+						new VocabularyScraper(), 0, inStream);
+				assertNotNull("Parser result must not be null for URL " + location, documents);
+			}
+		}
+
+	}
+
+	/**
+	 * Test support for parsing audio document with unknown or generic Media Type
+	 * 
+	 * @throws Failure              when the file could not be parsed
+	 * @throws InterruptedException when the test was interrupted before its
+	 *                              termination
+	 * @throws IOException          when a read/write error occurred
+	 */
+	@Test
+	public void testParseUnkownMediaType() throws Failure, InterruptedException, IOException {
+		final String testFileName = "umlaute_windows.ogg";
+		final DigestURL location = new DigestURL("http://localhost/" + testFileName);
+		final String[] mediaTypes = { null, "application/octet-stream" };
+
+		for (final String mediaType : mediaTypes) {
+			try (final FileInputStream inStream = new FileInputStream(new File(TEST_FOLDER, testFileName));) {
+				final Document[] documents = this.parser.parse(location, mediaType, StandardCharsets.UTF_8.name(),
+						new VocabularyScraper(), 0, inStream);
+				assertNotNull("Parser result must not be null for Media Type " + mediaType, documents);
+			}
+		}
+
+	}
+
+}