org.apache.hadoop.test.TestGenericTestUtils.java Source code

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Here is the source code for org.apache.hadoop.test.TestGenericTestUtils.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.hadoop.test;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.junit.Test;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static org.junit.Assert.assertTrue;

public class TestGenericTestUtils extends GenericTestUtils {

    @Test
    public void testAssertExceptionContainsNullEx() throws Throwable {
        try {
            assertExceptionContains("", null);
        } catch (AssertionError e) {
            if (!e.toString().contains(E_NULL_THROWABLE)) {
                throw e;
            }
        }
    }

    @Test
    public void testAssertExceptionContainsNullString() throws Throwable {
        try {
            assertExceptionContains("", new BrokenException());
        } catch (AssertionError e) {
            if (!e.toString().contains(E_NULL_THROWABLE_STRING)) {
                throw e;
            }
        }
    }

    @Test
    public void testAssertExceptionContainsWrongText() throws Throwable {
        try {
            assertExceptionContains("Expected", new Exception("(actual)"));
        } catch (AssertionError e) {
            String s = e.toString();
            if (!s.contains(E_UNEXPECTED_EXCEPTION) || !s.contains("(actual)")) {
                throw e;
            }
            if (e.getCause() == null) {
                throw new AssertionError("No nested cause in assertion", e);
            }
        }
    }

    @Test
    public void testAssertExceptionContainsWorking() throws Throwable {
        assertExceptionContains("Expected", new Exception("Expected"));
    }

    private static class BrokenException extends Exception {
        public BrokenException() {
        }

        @Override
        public String toString() {
            return null;
        }
    }

    @Test(timeout = 10000)
    public void testLogCapturer() {
        final Log log = LogFactory.getLog(TestGenericTestUtils.class);
        LogCapturer logCapturer = LogCapturer.captureLogs(log);
        final String infoMessage = "info message";
        // test get output message
        log.info(infoMessage);
        assertTrue(logCapturer.getOutput().endsWith(String.format(infoMessage + "%n")));
        // test clear output
        logCapturer.clearOutput();
        assertTrue(logCapturer.getOutput().isEmpty());
        // test stop capturing
        logCapturer.stopCapturing();
        log.info(infoMessage);
        assertTrue(logCapturer.getOutput().isEmpty());
    }

    @Test(timeout = 10000)
    public void testLogCapturerSlf4jLogger() {
        final Logger logger = LoggerFactory.getLogger(TestGenericTestUtils.class);
        LogCapturer logCapturer = LogCapturer.captureLogs(logger);
        final String infoMessage = "info message";
        // test get output message
        logger.info(infoMessage);
        assertTrue(logCapturer.getOutput().endsWith(String.format(infoMessage + "%n")));
        // test clear output
        logCapturer.clearOutput();
        assertTrue(logCapturer.getOutput().isEmpty());
        // test stop capturing
        logCapturer.stopCapturing();
        logger.info(infoMessage);
        assertTrue(logCapturer.getOutput().isEmpty());
    }

}