abstract ConfigurableFileCollection getSources()

                @OutputFile
                abstract RegularFileProperty getOutputFile()

                @TaskAction
                void doStuff() {
                    println("Running...")
                    outputFile.get().asFile.text = "executed"
                }
            }
        """
    }

                @Nested
                TaskReportContainer reports = project.services.get(org.gradle.internal.reflect.Instantiator).newInstance(TestTaskReportContainer, this)

                @TaskAction
                def doStuff() {
                    reports.enabled.each {
                         if (it.outputType == Report.OutputType.FILE) {

        TaskWithMultiParamAction              | "Cannot use @TaskAction annotation on method TaskWithMultiParamAction.doStuff() as this method takes multiple parameters."
        TaskWithSingleParamAction             | "Cannot use @TaskAction annotation on method TaskWithSingleParamAction.doStuff() because int is not a valid parameter to an action method."

    }

    def canCreateAndExecuteACustomTask() {
        when:
        def project = buildProject()
        def task = project.task('custom', type: CustomTask)
        task.doStuff()

        then:
        task.property == 'some value'
    }

    @LeaksFileHandles("script jar is held open")
    def canApplyABuildScript() {
        when:
        def project = buildProject()

Make sure the correct language is added to the class name: `language-kotlin`, `language-groovy`, or `language-java`:

```java
/**
 * <pre><code class="language-kotlin">
 * project.ext.prop1 = "foo"
 * task doStuff {
 *     ext.prop2 = "bar"
 * }
 * subprojects { ext.${prop3} = false }
 * </code></pre>
 */
```

                @OutputDirectory abstract DirectoryProperty getOutputClasses()

                Producer() { outputs.upToDateWhen { false } } // TODO doesn't matter, remove this

                @TaskAction void doStuff() {
                    File f = outputClasses.get().asFile
                    f.mkdirs()
                    new File(f, "some.txt") << "some text"
                }
            }

                @OutputDirectory
                private File getOutputDir() {
                    return new File("outputDir");
                }

                @TaskAction
                public void doStuff() { }
            }
        """

        expect:
        assertValidationFailsWith([

                    TextView textView = (TextView) findViewById(R.id.text_view);
                    textView.setText("The current local time is: " + currentTime);
                }

                ${changed ? "public void doStuff() {}" : ""}
            }""".stripIndent()

        file("${basedir}/src/main/res/layout/${resourceName}_layout.xml").text = '''<?xml version="1.0" encoding="utf-8"?>

        buildFile("""
            abstract class FailingTask extends DefaultTask {
                @Input
                abstract Property<String> getStringInput()

                @TaskAction
                void doStuff() {
                    println("Hello world")
                }
            }

            tasks.register("failingTask", FailingTask) {

                @OutputFile
                File getOutput() {
                    new File('build/output.txt')
                }

                @TaskAction
                void doStuff() {
                    output.text = getMyPrivateInput()
                }
            }

            abstract class MyTask extends MyBaseTask {
                @Input