/*
* Copyright 2014, The OpenNMS Group
*
* Licensed 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.opennms.newts.gsod;
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.junit.rules.TestName;
import rx.Observable;
import rx.observers.TestObserver;
public class FileObservableTest {
@Rule
public TestName name = new TestName();
@Rule
public TemporaryFolder tempFolder = new TemporaryFolder();
@Test
public void testWalking() throws IOException, InterruptedException {
Path dir = tempFolder.getRoot().toPath();
List<Path> files = createTestTree(dir, "a/a", "a/b", "b/a", "b/b");
TestObserver<Path> testObserver = new TestObserver<>();
Observable<Path> walk = FileObservable.fileTreeWalker(dir);
walk.subscribe(testObserver);
List<Path> observedFiles = testObserver.getOnNextEvents();
assertTrue(files.containsAll(observedFiles) && observedFiles.containsAll(files));
testObserver.assertTerminalEvent();
}
@Test
public void testLines() throws IOException {
Path testFile = tempFile("target/testing/lines-test");
List<String> lines = createTestFile(testFile,
"line1",
"line2",
"line3",
"",
"line5"
);
TestObserver<String> testObserver = new TestObserver<>();
Observable<String> contents = FileObservable.lines(testFile);
contents.subscribe(testObserver);
testObserver.assertReceivedOnNext(lines);
testObserver.assertTerminalEvent();
}
private List<String> createTestFile(Path file, String... lines) throws IOException {
List<String> list = Arrays.asList(lines);
Files.write(file, list, Charset.defaultCharset());
return list;
}
private List<Path> createTestTree(Path root, String... files) throws IOException {
List<Path> paths = new ArrayList<Path>();
for(String file : files) {
Path f = root.resolve(file);
f.getParent().toFile().mkdirs();
if (!Files.exists(f)) {
Files.createFile(f);
}
paths.add(f);
}
return paths;
}
private Path tempFile(String dir) throws IOException {
File d = new File(dir);
d.mkdirs();
return Files.createTempFile(d.toPath(), name.getMethodName(), ".txt");
}
}