Log back + TestNG 分Test Case 保存日

基本逻辑：

1. 使用 testNG 在每个 test 执行前根据 test case 生成文件名称，并且保存在MDC中（ThreadLocal）并且在执行结束后删除该文件名
2. 使用 Log back 的 SiftingAppender 根据不同的线程将日志写入不用的日志文件中

基本操作

1. 编写 TestNG Listener 编写

• 引入 maven 依赖

<dependency>
    <groupId>org.testng</groupId>
    <artifactId>testng</artifactId>
    <version>7.3.0</version>
    <scope>test</scope>
</dependency>

• 编写 Listener, 重写 beforeInvocation 和 afterInvocation 方法

package me.chan.service.user.test;

import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import org.testng.IInvokedMethod;
import org.testng.IInvokedMethodListener;
import org.testng.ITestResult;

public class TestListener implements IInvokedMethodListener {

    private static final Logger LOGGER = LoggerFactory.getLogger(TestListener.class);

    @Override
    public void beforeInvocation(IInvokedMethod method, ITestResult testResult) {
        String fileName = testResult.getTestClass().getRealClass().getSimpleName() + "#" +
            testResult.getName();

        MDC.put("testcase", fileName);
        LOGGER.debug("===============test started=================");

    }

    @Override
    public void afterInvocation(IInvokedMethod method, ITestResult testResult) {
        Throwable error = testResult.getThrowable();
        if (error != null) {
            LOGGER.error("===============test failed=================", error);
        }
        LOGGER.debug("===============test ended=================");
        MDC.remove("testcase");
    }
}

2. 配置 maven plugins

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>2.22.1</version>
            <configuration>
                <suiteXmlFiles>
                    <file>target/test-classes/testng.xml</file> 
                </suiteXmlFiles>
                <properties>
                    <property>
                        <name>suitethreadpoolsize</name>
                        <value>1</value>
                    </property>
                    <property>
                        <name>listener</name>
                        <value>me.chan.TestListener</value>
                    </property>
                </properties>
            </configuration>
        </plugin>
    </plugins>
</build>

3. 配置 logback 文件 (src/main/test/resources/logback.xml)

<?xml version="1.0" encoding="UTF-8"?>

<configuration debug="true" scan="true">

    <appender name="SIFT" class="ch.qos.logback.classic.sift.SiftingAppender">
        <discriminator>
            <key>testcase</key>
            <defaultValue>unknown</defaultValue>
        </discriminator>
        <sift>
            <!-- 读取 TestListener 设置的 testcase 属性-->
            <appender name="FILE-${testcase}" class="ch.qos.logback.core.FileAppender">
                <file>target/test-classes/logs/${testcase}.log</file>
                <append>true</append>
                <encoder class="ch.qos.logback.core.encoder.LayoutWrappingEncoder">
                    <layout class="ch.qos.logback.classic.PatternLayout">
                        <pattern>%d [%thread] %level %logger{35} - %msg%n</pattern>
                    </layout>
                </encoder>
            </appender>
        </sift>
    </appender>

    <root level="DEBUG">
        <appender-ref ref="SIFT"/>
    </root>

</configuration>

4. 配置 testng.xml (src/main/test/resources/testng.xml)

<?xml version = "1.0" encoding = "UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="my-test-suite">
    <test name="testcase-1" parallel="false" enabled="true">
        <classes>
            <class name="me.chan.test.Test1"/>
        </classes>
    </test>

</suite>

5. 运行

mvn clean test