class Foo {
                void bar() {
                }
            }
        """)

        val result = runTaskWithFailure("build")

        assertEquals(TaskOutcome.FAILED, result.task(":checkstyleMain")?.outcome)
        assertTrue(result.output.contains("Checkstyle rule violations were found."))
        assertTrue(result.output.contains("Checkstyle violations by severity: [error:1]"))
    }

    @Test

            class Foo {
                void bar() {
                }
            }
        """)

        val result = runTaskWithFailure("build")

        assertEquals(TaskOutcome.FAILED, result.task(":checkstyleMain")?.outcome)
        assertTrue(result.output.contains("Checkstyle rule violations were found."))
        assertTrue(result.output.contains("Checkstyle violations by severity: [error:1]"))
    }

    @Test

        file('config/checkstyle/checkstyle.xml') << simpleCheckStyleConfig()

        when:
        succeeds 'check'

        then:
        executedAndNotSkipped ':checkstyleMain'
    }

Note that Checkstyle will run with the same Java version used to run Gradle.

[[sec:checkstyle_tasks]]
== Tasks

The Checkstyle plugin adds the following tasks to the project:

`checkstyleMain` — link:{groovyDslPath}/org.gradle.api.plugins.quality.Checkstyle.html[Checkstyle]::
_Depends on_: `classes`
+
Runs Checkstyle against the production Java source files.

                    return "bar";
                }
            }
        """
    }

    def "generates HTML report with good code"() {
        goodCode()
        when:
        succeeds("checkstyleMain")
        then:
        def html = parseReport()
        def head = html.selectFirst("head")
        // Title of report is Checkstyle Violations
        head.select("title").text() == "Checkstyle Violations"

    def setup() {
        writeBuildFiles()
        writeConfigFile()
        goodCode()
    }

    def "accepts throwing exception from other project"() {
        expect:
        succeeds("checkstyleMain")
    }

    private void writeBuildFiles() {
        file("settings.gradle") << """
include "api"
include "client"
        """

        file("build.gradle") << """
subprojects {

    }

    /**
     * Configures which reports are to be aggregated in the build dashboard report generated by this task.
     *
     * <pre>
     * buildDashboard {
     *   aggregate codenarcMain, checkstyleMain
     * }
     * </pre>
     *
     * @param reportings an array of {@link Reporting} instances that are to be aggregated
     */
    @SuppressWarnings("unchecked")

        file('src/main/java/Dummy.java') << javaClassWithNewLineAtEnd()
        file('config/checkstyle/checkstyle.xml') << simpleCheckStyleConfig()

        expect:
        succeeds('checkstyleMain')
        checkStyleReportFile(testDirectory).assertExists()
    }

    def "fails when root project does contain config in default location"() {
        given:
        settingsFile << "include 'child'"

        "matching{true}.all" | 'test reports'            | ['java-library']               | 'test.reports'                           | ''
        "matching{true}.all" | 'checkstyle reports'      | ['java-library', 'checkstyle'] | 'checkstyleMain.reports'                 | ''
        "matching{true}.all" | 'pmd reports'             | ['java-library', 'pmd']        | 'pmdMain.reports'                        | ''