Google announced at 21/12/2017 that they have released a new-and-improved version of its Structured Data Testing Tool, available in beta as the Rich Results Test. The name of the tool "rich results" reflects – as noted in the announcement post – the fact that what Google had previously referred to as "rich snippets, rich cards, or enriched results" will now be called "rich results" as their official documentation moving forward.
Google said the new testing tool “focuses on the structured data types that are eligible to be shown as rich results.” This new version enables you to test all data sources on your pages, including the recommended JSON-LD, Microdata or RDFa. Google said this new version is a “more accurate reflection of the page’s appearance on Search and includes improved handling for Structured Data found on dynamically loaded content.”
The new Rich Results Testing tool currently only supports tests for Job posting, Recipe, Course, and Movie. Google said it will be adding support for other rich results over time.
The new google tool also has a drawback that, this tool does not currently show schema.org syntax errors, which currently used by millions of website.
Eligibility for rich results
The Structured Data Testing Tool never explicitly states whether a given page (or code block) is eligible for rich snippets. The closest the tool comes is to provide a "PREVIEW" link when results are capable of generating a rich result, and only then after you click through to the eligible data type.Eligibility is now front-and-center in the Rich Results Test response, with pages that are eligible for rich results clearly labelled as such, along which data type ("Detected structured data") for which the page is eligible.
It's equally obvious when a submitted page isn't eligible for a rich result.
There is also a third category pertaining to rich result eligibility, seemingly triggered when a page could be eligible for rich results if errors were corrected.
Details on these errors are provided in a pane on the "Detected structured data" section of the test results.
Again, be cognizant that only job postings, recipes, courses and movies are currently supported by the tool, as per the prominent message at the top of a test results page.