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WMAS-subset

Subsets of the WMAS API specification for specific purposes including ATSC3.0/HbbTV usage.

More: While the Web Media API Snapshot specification is appropriate for web media apps using HTML5/MSE/EME, there are other uses in which a subset of the API list can be helpful. One example is for ATSC3.0 Broadcast Apps ("BA's"), which are primariliy a JSON-based messaging app rather than a video player. However, such BA's still must draw themselves in the User Agent, still must use fonts and (many) other W3C APIs. This repo initially contains a WMAS subset for ATSC3.0 and HbbTV (one subset covering both).

About Intellectual Property: Any contribution made to the issues of this repository that results in a “shall” requirement pointing to an essential patent will require the company or individual holding the IPR to submit a Patent Holder Statement form. See https://standards.cta.tech/kwspub/rules/CTA-EP-23-T-IP-Proffer.pdf. Contributors are obliged to disclose to the working group any knowledge they may have of existing essential patents (or an intent to patent items whenever appropriate) affecting the work covered by this repository.

Note that CTA is not responsible for identifying any patents for which a license may be required by a CTA document, nor for conducting inquiries into the legal validity or scope of those patents that are brought to its attention. For further IPR information, see Section 15 of EP-23: https://standards.cta.tech/kwspub/rules/CTA-EP-23-T.pdf.

Process

Test subset is available for the WMAS versions (WMAS 2018, WMAS 2019 and WMAS 2021). Process of selecting WMAS test subset can be found here.

Requirement

Python 3.6 or greater must be installed. Install required packages:

pip install --upgrade pip
pip install -r requirements.txt

Run subsetting script

To get creation date for all tests (optional):

python get_test_creation_date.py

This script will clone wpt github repositry and checkout sepecific snapsot of WPT test directories for each testing group. The specific snapshots are defined in 'github_data.json'. Then it reads the creation date of test files. At the end of script it outputs a json file which contains creation date for all the tests. This script only requires to be run once as the creation date won't be changed normally. Generated json output file is alreay uploaded to json files. e.g: 'WMAS2019_test_creation_date.json'.

To get subset of tests:

python subsetting_wpt.py

This script takes input parameters which defined in input json files (e.g:'WMAS2019_input.json') and json output result files from 'get_test_creation_date.py' and generates test subsets and outputs a list of test subset in json files. When a input json file changed this script requires to be run again to get an updated result.

Output files

  • <wmas_version>_test_creation_date.json - Generated by "get_test_creation_date.py". This is a list of all tests with its creation date.
  • <wmas_version>_subset_report.csv - Generated by "subsetting_wpt.py". This is a report shows defined input from the input json file and generated result which are number of common passed tests and number of selected tests for each Api.
  • <wmas_version>_subset_of_tests.json - Generated by "subsetting_wpt.py". This is a list of selected subset of tests.
  • <wmas_version>_excluded_tests.json - Generated by "subsetting_wpt.py". This is a list of excluded tests.