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+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package utils;
+
+import static org.junit.jupiter.api.Assertions.fail;
+
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class FileUtils {
+
+ /**
+ * Reads contents of files inside the eventBodyDirectory, combines contents with metadata to make an Event Object.
+ * Fails test in the event of failure to read a file.
+ * @param targetDirectory Path to directory with files.
+ * @return List of Strings containing the body as acquired from files inside targetDirectory.
+ * @throws IOException in the event it fails to read from the files.
+ */
+ public static List<String> getFilesFromDirectory(Path targetDirectory ) throws IOException {
+ try (Stream<Path> eventFileStream = Files.walk(targetDirectory)) {
+ return eventFileStream.filter(Files::isRegularFile)
+ .filter(Files::isReadable)
+ .map(FileUtils::getFileContents)
+ .collect(Collectors.toList());
+ }
+ }
+
+ /**
+ * reads contents of file into a string.
+ * fails a tests in the event failure occurs.
+ * @param path path to file.
+ * @return string containing files contents
+ */
+ public static String getFileContents(Path path) {
+ try {
+ return new String(Files.readAllBytes(path));
+ } catch (IOException exception) {
+ fail("IOException occurred while reading file.");
+ }
+ return null;
+ }
+
+ /**
+ * Reads contents of resource.
+ * fails a test in the event failure occurs.
+ * @param fileName of file in resources to be read.
+ * @return contents of file
+ */
+ public static String getFileContents(String fileName) {
+ try {
+ Path path = Paths.get(ClassLoader.getSystemResource(fileName).toURI());
+ return getFileContents(path);
+ } catch (URISyntaxException exception) {
+ fail("Exception occurred, failed to acquire resource URI.");
+ }
+ return null;
+ }
+}