/*
 * Copyright 2015-2019 the original author or authors.
 *
 * All rights reserved. This program and the accompanying materials are
 * made available under the terms of the Eclipse Public License v2.0 which
 * accompanies this distribution and is available at
 *
 * http://www.eclipse.org/legal/epl-v20.html
 */

package org.junit.jupiter.api;

import static org.junit.jupiter.api.AssertionUtils.buildPrefix;
import static org.junit.jupiter.api.AssertionUtils.nullSafeGet;

import java.util.function.Supplier;

import org.junit.jupiter.api.function.Executable;
import org.junit.jupiter.api.function.ThrowingSupplier;
import org.junit.platform.commons.util.BlacklistedExceptions;
import org.junit.platform.commons.util.StringUtils;
import org.opentest4j.AssertionFailedError;

AssertDoesNotThrow is a collection of utility methods that support explicitly asserting that a given code block does not throw an exception.
Since:5.2
/** * {@code AssertDoesNotThrow} is a collection of utility methods that support * explicitly asserting that a given code block does not throw an exception. * * @since 5.2 */
class AssertDoesNotThrow { private AssertDoesNotThrow() { /* no-op */ } static void assertDoesNotThrow(Executable executable) { assertDoesNotThrow(executable, (Object) null); } static void assertDoesNotThrow(Executable executable, String message) { assertDoesNotThrow(executable, (Object) message); } static void assertDoesNotThrow(Executable executable, Supplier<String> messageSupplier) { assertDoesNotThrow(executable, (Object) messageSupplier); } private static void assertDoesNotThrow(Executable executable, Object messageOrSupplier) { try { executable.execute(); } catch (Throwable t) { BlacklistedExceptions.rethrowIfBlacklisted(t); throw createAssertionFailedError(messageOrSupplier, t); } } static <T> T assertDoesNotThrow(ThrowingSupplier<T> supplier) { return assertDoesNotThrow(supplier, (Object) null); } static <T> T assertDoesNotThrow(ThrowingSupplier<T> supplier, String message) { return assertDoesNotThrow(supplier, (Object) message); } static <T> T assertDoesNotThrow(ThrowingSupplier<T> supplier, Supplier<String> messageSupplier) { return assertDoesNotThrow(supplier, (Object) messageSupplier); } private static <T> T assertDoesNotThrow(ThrowingSupplier<T> supplier, Object messageOrSupplier) { try { return supplier.get(); } catch (Throwable t) { BlacklistedExceptions.rethrowIfBlacklisted(t); throw createAssertionFailedError(messageOrSupplier, t); } } private static AssertionFailedError createAssertionFailedError(Object messageOrSupplier, Throwable t) { String message = buildPrefix(nullSafeGet(messageOrSupplier)) + "Unexpected exception thrown: " + t.getClass().getName() + buildSuffix(t.getMessage()); return new AssertionFailedError(message, t); } private static String buildSuffix(String message) { return StringUtils.isNotBlank(message) ? ": " + message : ""; } }