runWithReporter method

  1. @override
void runWithReporter(
  1. SaropaDiagnosticReporter reporter,
  2. SaropaContext context
)
override

Override this method to implement your lint rule.

Use context to register callbacks for AST node types:

context.addMethodInvocation((node) {
  if (condition) {
    reporter.atNode(node);
  }
});

Implementation

@override
void runWithReporter(
  SaropaDiagnosticReporter reporter,
  SaropaContext context,
) {
  final String path = context.filePath;
  if (!path.endsWith('_test.dart') &&
      !path.contains('/test/') &&
      !path.contains(r'\test\')) {
    return;
  }

  final List<MethodInvocation> sizeTests = <MethodInvocation>[];

  context.addMethodInvocation((MethodInvocation node) {
    if (node.methodName.name != 'testWidgets') return;

    final ArgumentList args = node.argumentList;
    if (args.arguments.length >= 2) {
      final Expression callback = args.arguments[1];
      if (callback is FunctionExpression) {
        final String bodySource = callback.body.toSource();

        // Check for screen size configuration (word-boundary to avoid FP)
        if (RegExp(r'\bphysicalSizeTestValue\b').hasMatch(bodySource) ||
            RegExp(r'\bdevicePixelRatio\b').hasMatch(bodySource) ||
            RegExp(r'\btextScaleFactor\b').hasMatch(bodySource)) {
          sizeTests.add(node);
        }
      }
    }
  });

  context.addPostRunCallback(() {
    // If there are multiple size-related tests, suggest variant
    if (sizeTests.length >= 2) {
      for (final MethodInvocation test in sizeTests) {
        reporter.atNode(test.methodName, code);
      }
    }
  });
}