packages/flutter/.vscode/tasks.json

{
  "version": "0.1.0",
  "command": "flutter",
  "args": [],
  "showOutput": "always",
  "echoCommand": true,
  "tasks": [
    {
      // Assign key binding to workbench.action.tasks.test to quickly run 
      // the currently open test. 
      "taskName": "test",
      "isTestCommand": true,
      "isShellCommand": true,
      "args": ["${file}"]
    }
  ]
}