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prefer-correct-switch-length

added in: 1.3.0
style
⚙️
Pro+

Warns when a switch has too few or too many cases.

⚙️ Config​

Set min-length (default is 3) to configure the minimum number of cases.

Set max-length (default is 10) to configure the maximum number of cases after which the rule should trigger.

Set ignore-fallthrough-cases (default is false) to ignore fallthrough cases (with no body) (example).

analysis_options.yaml
dart_code_metrics:
  rules:
    - prefer-correct-switch-length:
        min-length: 3
        max-length: 10
        ignore-fallthrough-cases: false

Example​

❌ Bad:

// LINT: This switch has 1 case which is below the configured minimum of 3.
switch (value) {
  case '1':
    {
      print('hello world');
      break;
    }
}

✅ Good:

switch (value) {
  case '1':
    {
      ...
    }

  case '2':
    {
      ...
    }

  case '3':
    {
      ...
    }
}

Example with "ignore-fallthrough-cases"​

Config
analysis_options.yaml
dart_code_metrics:
  rules:
    - prefer-correct-switch-length:
        ignore-fallthrough-cases: true

❌ Bad:

// LINT: This switch has 1 case which is below the configured minimum of 3.
switch (value) {
  case '1':
  case '2':
  case '3':
  case '4':
    {
      print('hello world');
      break;
    }
}