package.json - this is the manifest file in which you declare your extension and command.
The sample plugin registers a command and defines its title and command name. With this information
VS Code can show the command in the command palette. It doesn’t yet need to load the plugin.src/extension.ts - this is the main file where you will provide the implementation of your command.
The file exports one function, activate, which is called the very first time your extension is
activated (in this case by executing the command). Inside the activate function we call registerCommand.
We pass the function containing the implementation of the command as the second parameter to
registerCommand.F5 to open a new window with your extension loaded.Ctrl+Shift+P or Cmd+Shift+P on Mac) and typing Hello World.src/extension.ts to debug your extension.src/extension.ts.Ctrl+R or Cmd+R on Mac) the VS Code window with your extension to load your changes.node_modules/vscode/vscode.d.ts.Ctrl+Shift+D or Cmd+Shift+D on Mac) and from the launch configuration dropdown pick Launch Tests.F5 to run the tests in a new window with your extension loaded.test/extension.test.ts or create new test files inside the test folder.
**.test.ts.test folder to structure your tests any way you want.