evosuite 代码研读

源码分析

master/EvoSuite/main
master/EvoSuite/parseCommandLine
master/executionmode.TestGeneration/executeTestGeneration
master/executionmode.TestGeneration/generateTests // Create MasterNode and ClientNodes, start to search
master/statistics.SearchStatistics/getInstance // evolutionary search
--> results
    addTestGenerationResult


writeStatistics // Write result to disk using selected backend

涉及到了 master-work 设计模式，先看这个设计模式。

master 中有 MasterNodeImpl 类，实现了 client 中的 MasterNodeRemote （RMI reference used to communicate with the master node.） 接口。然后 client 中的 ClientNodeImpl 类通过 java.rmi 的方式使用到了 MasterNodeImpl 类中的方法。

master 中有 SearchStatistics 类 （A singleton of SearchStatistics collects all the data values reported by a single client node.），MasterNodeImpl 类调用了 SearchStatistics 类中的方法。

// client -> org.evosuite.rmi.service.ClientNodeImpl -> init()
private MasterNodeRemote masterNode;
masterNode = (MasterNodeRemote) registry.lookup(MasterNodeRemote.RMI_SERVICE_NAME); // 使用了 java.rmi.registry

registry 在 master 中创建并指定端口号，client 获取端口号后得到 registry 的引用。master 在 MasterServices 中创建 MasterNode 并注册，client 在 ClientServices 中创建 ClientNode 并注册。端口保存在 client 的 Properties 中，运行时动态赋值。

MasterNode: 
(TestGeneration) handle.openServer() -> MasterSevices.getInstance().registerServices()
ClientNode:
(TestGeneration) handler.startProcessGroup() -> (ExternalProcessGroupHandler) startProcessGroup() -> (ExternalProcessGroupHandler) startProcess() ClientProcess.main() -> process.run() -> ClientServices.getInstance().registerServices()

执行结果

"C:\Program Files\Java\jdk1.8.0_181\bin\java.exe" -Dmaven.multiModuleProjectDirectory=D:\IdeaProjects\EvosuiteTest "-Dmaven.home=D:\JetBrains\IntelliJ IDEA 2020.2.1\plugins\maven\lib\maven3" "-Dclassworlds.conf=D:\JetBrains\IntelliJ IDEA 2020.2.1\plugins\maven\lib\maven3\bin\m2.conf" "-Dmaven.ext.class.path=D:\JetBrains\IntelliJ IDEA 2020.2.1\plugins\maven\lib\maven-event-listener.jar" "-javaagent:D:\JetBrains\IntelliJ IDEA 2020.2.1\lib\idea_rt.jar=9331:D:\JetBrains\IntelliJ IDEA 2020.2.1\bin" -Dfile.encoding=UTF-8 -classpath "D:\JetBrains\IntelliJ IDEA 2020.2.1\plugins\maven\lib\maven3\boot\plexus-classworlds-2.6.0.jar;D:\JetBrains\IntelliJ IDEA 2020.2.1\plugins\maven\lib\maven3\boot\plexus-classworlds.license" org.codehaus.classworlds.Launcher -Didea.version=2020.2.1 evosuite:generate
[INFO] Scanning for projects...
[INFO] 
[INFO] ----------------------< org.example:EvosuiteTest >----------------------
[INFO] Building EvosuiteTest 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] >>> evosuite-maven-plugin:1.0.6:generate (default-cli) > compile @ EvosuiteTest >>>
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ EvosuiteTest ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ EvosuiteTest ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] <<< evosuite-maven-plugin:1.0.6:generate (default-cli) < compile @ EvosuiteTest <<<
[INFO] 
[INFO] 
[INFO] --- evosuite-maven-plugin:1.0.6:generate (default-cli) @ EvosuiteTest ---
[INFO] Going to generate tests with EvoSuite
[INFO] Total memory: 800mb
[INFO] Time per class: 2 minutes
[INFO] Number of used cores: 1
[INFO] Target: D:\IdeaProjects\EvosuiteTest\target\classes
[INFO] Basedir: D:\IdeaProjects\EvosuiteTest
[INFO] Started spawn process manager on port 9335
[INFO] SLF4J: Class path contains multiple SLF4J bindings.
[INFO] SLF4J: Found binding in [jar:file:/C:/Users/17199/.m2/repository/org/evosuite/evosuite-master/1.0.6/evosuite-master-1.0.6.jar!/org/slf4j/impl/StaticLoggerBinder.class]
[INFO] SLF4J: Found binding in [jar:file:/C:/Users/17199/.m2/repository/ch/qos/logback/logback-classic/1.1.3/logback-classic-1.1.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
[INFO] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
[INFO] SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
[INFO] * EvoSuite 1.0.6
[INFO] Registered remote process from /127.0.0.1:9336
[INFO] Going to execute 1 jobs
[INFO] Estimated completion time: 2 minutes, by 2021-12-01T18:24:26.491
[INFO] Going to start job for: hello. Expected to end in 120 seconds, by 2021-12-01T18:24:27.058
[INFO] Registered remote process from /127.0.0.1:9337
[INFO] Registered remote process from /127.0.0.1:9343
[INFO] Completed job. Left: 0
[INFO] * Updating database to hello
[INFO] === CTG run results ===
[INFO] Removed test suites: 0
[INFO] New test suites: 1
[INFO] Stopping spawn process manager
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  16.000 s
[INFO] Finished at: 2021-12-01T18:22:38+08:00
[INFO] ------------------------------------------------------------------------