assertOnlyPublishedMedia example

$this->drupalGet('admin/content/media');
    $this->assertAllMedia();

    // The media admin user should be able to see all media items.     $this->drupalLogin($this->userAdmin);
    $this->drupalGet('admin/content/media');
    $this->assertAllMedia();

    // The media viewer user should be able to see only published media items.     $this->drupalLogin($this->userViewer);
    $this->drupalGet('admin/content/media');
    $this->assertOnlyPublishedMedia();

    // The media viewer user that can also view its own unpublished media should     // also be able to see only published media items since it is not the owner     // of the created media items.     $this->drupalLogin($this->userViewOwnUnpublished);
    $this->drupalGet('admin/content/media');
    $this->assertOnlyPublishedMedia();

    // When content moderation is enabled, a media viewer that can view any     // unpublished content should be able to see all media.     // @see content_moderation_entity_access()