Test DRUPAL_CACHE_PER_PAGE.
function testCachePerPage() {
$this
->setCacheMode(DRUPAL_CACHE_PER_PAGE);
$current_content = $this
->randomName();
state()
->set('block_test.content', $current_content);
$this
->drupalGet('node');
$this
->assertText($current_content, 'Block content displays on the node page.');
$old_content = $current_content;
$current_content = $this
->randomName();
state()
->set('block_test.content', $current_content);
$this
->drupalGet('user');
$this
->assertNoText($old_content, 'Block content cached for the node page does not show up for the user page.');
$this
->drupalGet('node');
$this
->assertText($old_content, 'Block content cached for the node page.');
}