VSCode task for running `cargo test` in watch mode

tasks.json

{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "Run `cargo test` in watch mode",
      "detail": "Requires \"cargo watch\" subcommand: https://github.com/passcod/cargo-watch",
      "group": "test",
      "type": "process",
      "command": "cargo",
      "args": ["watch", "-x", "test --no-fail-fast"],
      "isBackground": true,
      "problemMatcher": [
        {
          "owner": "rust",
          "severity": "error",
          "fileLocation": ["relative", "${workspaceRoot}"],
          "background": {
            "beginsPattern": "^\\[Running '.*'\\]$",
            "endsPattern": "^\\[Finished running. Exit status: \\d+\\]$"
          },
          "pattern": {
            "regexp": "^.*panicked\\s+at\\s+'(.*)',\\s+(.*):(\\d+):(\\d+)$",
            "message": 1,
            "file": 2,
            "line": 3,
            "column": 4
          }
        },
        {
          "owner": "rust",
          "severity": "error",
          "fileLocation": ["relative", "${workspaceRoot}"],
          "background": {
            "beginsPattern": "^\\[Running '.*'\\]$",
            "endsPattern": "^\\[Finished running. Exit status: \\d+\\]$"
          },
          "pattern": [
            {
              "regexp": ".*panicked\\s+at\\s+'(.*)",
              "message": 1
            },
            {
              "regexp": "^.*$",
              "message": 0
            },
            {
              "regexp": "^(.*)', (\\S*):(\\d+):(\\d+)$",
              "message": 1,
              "file": 2,
              "line": 3,
              "column": 4
            }
          ]
        }
      ]
    }
  ]
}