and:
        def output = OutputScrapingExecutionResult.from(t.message, "")
        def taskHeader = gradleVersion >= GradleVersion.version("4.0") ? "\n> Task :helloWorld" : ":helloWorld"
        // GradleRunner disables FS watching on Windows by passing a command line argument, so the arguments are different for Windows and other operating systems
        // See GradleRunner's Javadoc.

It automatically adds the `gradleTestKit()` dependency to the `testImplementation` configuration and generates a plugin classpath manifest file consumed by a `GradleRunner` instance if found.
Please refer to <<test_kit.adoc#sub:test-kit-automatic-classpath-injection,Automatic classpath injection with the Plugin Development Plugin>> for more on its usage, configuration options and samples.

include::sample[dir="snippets/developingPlugins/testingPlugins/groovy/url-verifier-plugin",files="build.gradle[tags=source-set-config]"]
====

Functional tests for Gradle plugins use an instance of `GradleRunner` to execute the build under test.
`GradleRunner` is an API provided by TestKit, which internally uses the Tooling API to execute the build.

                            ${testKitSpec.childProjectBuildScript ?: ""}
                        \"\"\".stripIndent()

                        //when:
                        def runner = GradleRunner.create()
                            .withGradleInstallation(new File("${TextUtil.normaliseFileSeparators(distribution.gradleHomeDir.absolutePath)}"))

To avoid problems with these file locks, `<<test_kit#test_kit,TestKit>>` disables file system watching for builds executed on Windows via `GradleRunner`.
If you'd like to override the default behavior, you can enable file system watching by passing `--watch-fs` to `GradleRunner.withArguments()`.

==== Removal of the legacy `maven` plugin

The `maven` plugin has been removed.
You should use the `maven-publish` plugin instead.

To enable configuration caching in your tests, you can pass the `--configuration-cache` argument to link:{javadocPath}/org/gradle/testkit/runner/GradleRunner.html[GradleRunner] or use one of the other methods described in <<configuration_cache.adoc#config_cache:usage:enable,Enabling the configuration cache>>.

You need to run your tasks twice.
Once to prime the configuration cache.