Defines test harness for Jenkins core and plugins that you can use during the mvn test phase. See wiki page

• Added CLICommandInvoker.Result.stdoutBinary and .stderrBinary.
• Deprecated PresetData.

• RestartableJenkinsRule utilities to simulate abrupt (i.e., unplanned) shutdowns.

• Added LoggerRule.recordPackage as a convenience.
• Added LoggerRule.recorded methods returning matchers to simplify checking for log records.
• Added WebClient.withBasicCredentials and .withBasicApiToken methods to simplify passing authentication to REST requests as an alternative to .login.
• waitOnline with JNLPLauncher failed rather than waiting.
• Do not even try to persist an Authentication via XStream.

• Introduced RestartableJenkinsRule.createJenkinsRule.
• Changed JenkinsRule.createComputerLauncher to return the more generic type ComputerLauncher rather than CommandLauncher.

• Avoiding JenkinsRule plugin setup error involving excluded optional transitive dependencies.

• Introduced JenkinsRule.waitOnline, improving diagnostics for createSlave and createOnlineSlave.
• Issue a friendlier warning for a harmless @TestExtension binary incompatibility issue.

• Fixing a regression in LoggerRule in 2.26, and improving log appearance further.

• JENKINS-45245: work around incorrect Maven test classpath in IntelliJ IDEA.
• More readable timestamps in log messages during tests.

• Adjust Jetty configuration to use a fixed number of “acceptors” and “selectors”. This has been observed to fix JENKINS-43666-like test failures in some CI environments, depending on the reported number of CPU cores.
• Improve display of messages when using LoggerRule.

• More reliable test timeout system in JenkinsRule.

• Added RestartableJenkinsRule.then with a Java 8-friendly signature.
• Upgrade to Jetty 9.4.

• JENKINS-41631: removing the Maven Embedder dependency from the harness.
• JENKINS-44453: JenkinsRule should ensure that Jenkins reaches the COMPLETED milestone.

• Make FakeChangeLogSCM support Run rather than just AbstractBuild.

• Fixed a regression in 2.20 affecting especially InjectedTest on Jenkins 2.x.

• “Detached” plugins in Jenkins 2.x are no longer loaded implicitly during tests. You should declare test-scoped dependencies on plugins you expect to use during your tests, in the desired versions. TestPluginManager.installResourcePlugin has been removed, and installDetachedPlugin added for unusual cases.
• Avoid using methods deleted in newer version of HtmlUnit.
• waitForMessage can fail immediately if the build is completed.
• Possible to override JenkinsRule.createWebServer more easily.
• Deprecating CLICommandInvoker.authorizedTo in favor of a simpler asUser.
• Make Jetty be quiet during functional tests.
• Pick up jetty-io and jetty-util from our specified version to avoid conflicts.

• Introduced allowSoft parameter to assertGC.
• Avoid any fixed timeout on waitUntilNoActivity.

• Fixed JenkinsComputerConnectorTester so ComputerConnectors can be tested through JenkinsRule.configRoundTrip.
• Improved MemoryAssert.assertGC: now catches more root references, and can run with the environment variable ASSERT_GC_VERBOSE=true to track down SoftReference leaks.
• Better report java.lang.IllegalArgumentException: URI is not hierarchical; generally this is a symptom of a plugin missing a root index.jelly.

• JenkinsRule.getLog fixed to make fewer assumptions about the implementation of Run.getLogText.

Not recorded.