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// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.handler;
import com.yahoo.vespa.test.file.TestFileSystem;
import org.json.JSONObject;
import org.junit.Before;
import org.junit.Test;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.FileSystem;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.FileTime;
import java.time.Instant;
import java.util.Scanner;
import java.util.regex.Pattern;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import static org.junit.Assert.assertEquals;
public class LogReaderTest {
private final FileSystem fileSystem = TestFileSystem.create();
private final Path logDirectory = fileSystem.getPath("/opt/vespa/logs");
@Before
public void setup() throws IOException {
Files.createDirectories(logDirectory.resolve("subfolder"));
Files.setLastModifiedTime(
Files.write(logDirectory.resolve("log1.log.gz"), compress("This is one log file\n")),
FileTime.from(Instant.ofEpochMilli(123)));
Files.setLastModifiedTime(
Files.write(logDirectory.resolve("subfolder/log2.log"), "This is another log file\n".getBytes()),
FileTime.from(Instant.ofEpochMilli(234)));
}
@Test
public void testThatFilesAreWrittenCorrectlyToOutputStream() throws Exception{
LogReader logReader = new LogReader(logDirectory, Pattern.compile(".*"));
JSONObject json = logReader.readLogs(Instant.ofEpochMilli(21), Instant.now());
String expected = "{\"subfolder-log2.log\":\"VGhpcyBpcyBhbm90aGVyIGxvZyBmaWxlCg==\",\"log1.log.gz\":\"VGhpcyBpcyBvbmUgbG9nIGZpbGUK\"}";
String actual = json.toString();
assertEquals(expected, actual);
}
@Test
public void testThatLogsOutsideRangeAreExcluded() throws Exception {
LogReader logReader = new LogReader(logDirectory, Pattern.compile(".*"));
JSONObject json = logReader.readLogs(Instant.MAX, Instant.MIN);
String expected = "{}";
String actual = json.toString();
assertEquals(expected, actual);
}
@Test
public void testThatLogsNotMatchingRegexAreExcluded() throws Exception {
LogReader logReader = new LogReader(logDirectory, Pattern.compile(".*2\\.log"));
JSONObject json = logReader.readLogs(Instant.ofEpochMilli(21), Instant.now());
String expected = "{\"subfolder-log2.log\":\"VGhpcyBpcyBhbm90aGVyIGxvZyBmaWxlCg==\"}";
String actual = json.toString();
assertEquals(expected, actual);
}
@Test
public void testZippedStreaming() throws IOException {
ByteArrayOutputStream zippedBaos = new ByteArrayOutputStream();
LogReader logReader = new LogReader(logDirectory, Pattern.compile(".*"));
logReader.writeLogs(zippedBaos, Instant.ofEpochMilli(21), Instant.now());
GZIPInputStream unzippedIs = new GZIPInputStream(new ByteArrayInputStream(zippedBaos.toByteArray()));
Scanner s = new Scanner(unzippedIs).useDelimiter("\\A");
String actual = s.hasNext() ? s.next() : "";
String expected = "This is one log file\nThis is another log file\n";
assertEquals(expected, actual);
}
private byte[] compress(String input) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStream zip = new GZIPOutputStream(baos);
zip.write(input.getBytes());
zip.close();
return baos.toByteArray();
}
}
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