def location = new TestFile("location")
    def logger = Mock(Logger)

    def "only reports problems once"() {
        when:
        problemReporter.reportProblemIfNeeded(logger, InstallationLocation.userDefined(location, "source"), "message")
        problemReporter.reportProblemIfNeeded(logger, InstallationLocation.userDefined(location, "source"), "message")
        then:
        1 * logger.log(LogLevel.WARN, "message")
    }

        if (!file.exists()) {
            problemReporter.reportProblemIfNeeded(logger, installationLocation, "Directory " + installationLocation.getDisplayName() + " used for java installations does not exist");
            return false;
        }
        if (!file.isDirectory()) {

        }
    }

    private final Set<ProblemReport> reportedProblems = Sets.newConcurrentHashSet();

    public void reportProblemIfNeeded(Logger targetLogger, InstallationLocation installationLocation, String message) {
        ProblemReport key = new ProblemReport(installationLocation.isAutoDetected(), message);
        if (!reportedProblems.add(key)) {