version current withGradleUserHomeDir userHome withTasks 'retrieve' withArguments '-i' run()

        then:
        file('libs').assertHasDescendants('projectB-1.0.jar')
        file('libs/projectB-1.0.jar').assertContentsHaveNotChangedSince(snapshot)
    }

    def "uses cached artifacts from previous Gradle version with sha1 header"() {
        given:
        def projectB = mavenHttpRepo.module('org.name', 'projectB', '1.0').publish()

        when:
        withBuildCache().run "jacocoTestReport", "jacocoTestCoverageVerification"
        then:
        skipped ":test", ":jacocoTestReport", ":jacocoTestCoverageVerification"
        reportFile.assertContentsHaveNotChangedSince(snapshot)
    }

    def "jacoco file results are not cached when sharing output with another task"() {
        javaProjectUnderTest.writeIntegrationTestSourceFiles()
        buildFile << """

        version current withGradleUserHomeDir userHome withTasks 'retrieve' withArguments '-i' run()

        then:
        file('libs').assertHasDescendants('projectB-1.0.jar')
        file('libs/projectB-1.0.jar').assertContentsHaveNotChangedSince(snapshot)
    }

    static boolean isIgnoredMilestone(DefaultGradleDistribution distribution) {
        def v = distribution.version

dependencies.components.all(ChangingFalseRule)
"""
        snapshot = artifact.snapshot()
        server.resetExpectations()

        and:
        run("retrieve")

        then:
        artifact.assertContentsHaveNotChangedSince(snapshot)
    }

    def "rule cannot make a dependency non-changing"() {
        buildFile <<
"""
$repoDeclaration
configurations {
    modules {

        Snapshot now = snapshot();
        assertNotEquals(String.format("contents of %s have not changed", this), snapshot.hash, now.hash);
    }

    public void assertContentsHaveNotChangedSince(Snapshot snapshot) {
        Snapshot now = snapshot();
        assertEquals(String.format("contents of %s has changed", this), snapshot.hash, now.hash);
    }