Verifies that links do not have language prefixes in them.
function testPageLinks() {
// Navigate to 'admin/config' path.
$this
->drupalGet('admin/config');
// Verify that links in this page do not have a 'fr/' prefix.
$this
->assertNoLinkByHref('/fr/', 'Links do not contain language prefix');
// Verify that links in this page can be followed and work.
$this
->clickLink(t('Languages'));
$this
->assertResponse(200, 'Clicked link results in a valid page');
$this
->assertText(t('Add language'), 'Page contains the add language text');
}