How to make VS Code treat a file extensions as a certain language?

PC  ctrl    + shift +  P

Mac control + shift +  P

STEP1: Choose "Preferences: Open User Setting(JSON):

Step2: Add the below sentence in the setting.

        "files.associations" : { "*.test": "python"} 

Terminal Shortcut on Mac:

option +  <--  : moving the cursor to the beginning of one word.

control + k : Deleting the space/ text from the cursor to the end of the command line.

File path: Dropping the file into the Terminal instead of typing the file path.

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