Install a license in a JWebUnit test case.

gistfile1.txt

// Use this in a com.atlassian.confluence.plugin.functest.AbstractConfluencePluginWebTestCase to install a license in Confluence:

    static boolean isLicenseInstalled = false;
    private void installLicense() {
        if (!isLicenseInstalled) {
            gotoPage("/admin/license.action");
            setWorkingForm("updateLicenseForm");
            setTextField("licenseString", LICENSE);
            submit("update");

            String maxUserString = getElementTextByXPath("//table[@class='confluenceTable']//tr[4]/td[2]/strong");
            int maxUsers = NumberUtils.toInt(maxUserString, -1);
            if (maxUsers != 10) {
                fail("License could not be installed successfully");
            }

            isLicenseInstalled = true;
        }
    }