runWithReporter method

@override void runWithReporter(SaropaDiagnosticReporter reporter, SaropaContext context)

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,
) {
  // Check every method invocation; only test()/group() calls are relevant.
  context.addMethodInvocation((MethodInvocation node) {
    final String methodName = node.methodName.name;

    // test(), testWidgets(), and group() all accept the solo named parameter.
    if (methodName != 'test' &&
        methodName != 'testWidgets' &&
        methodName != 'group') {
      return;
    }

    // Look for a named `solo: true` argument among the call's arguments.
    for (final Expression arg in node.argumentList.arguments) {
      if (arg is NamedExpression &&
          arg.name.label.name == 'solo' &&
          arg.expression is BooleanLiteral &&
          (arg.expression as BooleanLiteral).value == true) {
        // Flag the `solo: true` argument itself for a precise error location.
        reporter.atNode(arg);
        return;
      }
    }
  });
}