jest:tldr:abca0

This command uses the Jest testing framework to run tests that match a specific regular expression pattern for the test names.

Here's the breakdown of the command and its components:

• jest: This is the executable command for running Jest, a popular JavaScript testing framework.
• --testNamePattern: This option allows you to specify a regular expression pattern to match the test names against.
• ${regular_expression}: This is a placeholder indicating that you should replace it with your desired regular expression pattern. Regular expressions are a powerful way to search, match, and manipulate text patterns in strings.
• The overall command would be something like jest --testNamePattern ^test- which would only run tests whose names start with "test-".

By using this command, you can selectively run specific tests based on matching their names against a regular expression pattern.