4904d7eea0
* Add custom license header style in order to comply with Google's Checkstyle format * Update license headers to comply with Google's Checkstyle format
82 lines
2.7 KiB
Java
82 lines
2.7 KiB
Java
/*
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* The MIT License
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* Copyright © 2014-2019 Ilkka Seppälä
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package com.iluwatar.mute;
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import org.junit.jupiter.api.Test;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.PrintStream;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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/**
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* Test for the mute-idiom pattern
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*/
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public class MuteTest {
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private static final Logger LOGGER = LoggerFactory.getLogger(MuteTest.class);
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private static final String MESSAGE = "should not occur";
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@Test
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public void muteShouldRunTheCheckedRunnableAndNotThrowAnyExceptionIfCheckedRunnableDoesNotThrowAnyException() {
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Mute.mute(this::methodNotThrowingAnyException);
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}
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@Test
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public void muteShouldRethrowUnexpectedExceptionAsAssertionError() {
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assertThrows(AssertionError.class, () -> {
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Mute.mute(this::methodThrowingException);
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});
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}
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@Test
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public void loggedMuteShouldRunTheCheckedRunnableAndNotThrowAnyExceptionIfCheckedRunnableDoesNotThrowAnyException() {
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Mute.loggedMute(this::methodNotThrowingAnyException);
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}
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@Test
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public void loggedMuteShouldLogExceptionTraceBeforeSwallowingIt() {
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ByteArrayOutputStream stream = new ByteArrayOutputStream();
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System.setErr(new PrintStream(stream));
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Mute.loggedMute(this::methodThrowingException);
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assertTrue(new String(stream.toByteArray()).contains(MESSAGE));
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}
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private void methodNotThrowingAnyException() {
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LOGGER.info("Executed successfully");
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}
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private void methodThrowingException() throws Exception {
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throw new Exception(MESSAGE);
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}
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}
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