Use Java 11 Files APIs

Author: marcphilipp

platform-tests/src/test/java/org/junit/platform/console/ConsoleDetailsTests.java

@@ -43,6 +43,7 @@
 import org.junit.jupiter.api.function.Executable;
 import org.junit.platform.console.options.Details;
 import org.junit.platform.console.options.Theme;
+import org.opentest4j.TestAbortedException;
 
 /**
  * @since 1.0
@@ -211,13 +212,13 @@ public void execute() throws Throwable {
 			var result = wrapper.execute(Optional.empty(), args);
 
 			var optionalUri = toUri(dirName, outName);
-			if (!optionalUri.isPresent()) {
+			if (optionalUri.isEmpty()) {
 				if (Boolean.getBoolean("org.junit.platform.console.ConsoleDetailsTests.writeResultOut")) {
 					// do not use Files.createTempDirectory(prefix) as we want one folder for one container
 					var temp = Paths.get(System.getProperty("java.io.tmpdir"), dirName.replace('/', '-'));
 					Files.createDirectories(temp);
-					var path = Files.write(temp.resolve(outName), result.out.getBytes(UTF_8));
-					assumeTrue(false,
+					var path = Files.writeString(temp.resolve(outName), result.out);
+					throw new TestAbortedException(
 						format("resource `%s` not found\nwrote console stdout to: %s/%s", dirName, outName, path));
 				}
 				fail("could not load resource named `" + dirName + "/" + outName + "`");

platform-tests/src/test/java/org/junit/platform/reporting/legacy/xml/LegacyXmlReportGeneratingListenerTests.java

@@ -10,7 +10,6 @@
 
 package org.junit.platform.reporting.legacy.xml;
 
-import static java.nio.charset.StandardCharsets.UTF_8;
 import static java.util.Collections.emptySet;
 import static java.util.Collections.singleton;
 import static org.assertj.core.api.Assertions.assertThat;
@@ -418,7 +417,7 @@ private void executeTests(TestEngine engine, Path tempDirectory, Clock clock) {
 
 	private String readValidXmlFile(Path xmlFile) throws Exception {
 		assertTrue(Files.exists(xmlFile), () -> "File does not exist: " + xmlFile);
-		var content = new String(Files.readAllBytes(xmlFile), UTF_8);
+		var content = Files.readString(xmlFile);
 		assertValidAccordingToJenkinsSchema(content);
 		return content;
 	}