static Map _reconstituteNamedArgs()

in lib/src/mock.dart [295:345]
38 lines of code
5 McCabe index (conditional complexity)

  static Map<Symbol, dynamic> _reconstituteNamedArgs(Invocation invocation) {
    final namedArguments = <Symbol, dynamic>{};
    final storedNamedArgSymbols =
        _storedNamedArgs.keys.map((name) => Symbol(name));

    // Iterate through [invocation]'s named args, validate them, and add them
    // to the return map.
    invocation.namedArguments.forEach((name, arg) {
      if (arg == null) {
        if (!storedNamedArgSymbols.contains(name)) {
          // Either this is a parameter with default value `null`, or a `null`
          // argument was passed, or an unnamed ArgMatcher was used. Just use
          // `null`.
          namedArguments[name] = null;
        }
      } else {
        // Add each real named argument (not wrapped in an ArgMatcher).
        namedArguments[name] = arg;
      }
    });

    // Iterate through the stored named args, validate them, and add them to
    // the return map.
    _storedNamedArgs.forEach((name, arg) {
      var nameSymbol = Symbol(name);
      if (!invocation.namedArguments.containsKey(nameSymbol)) {
        // Clear things out for the next call.
        _storedArgs.clear();
        _storedNamedArgs.clear();
        throw ArgumentError(
            'An ArgumentMatcher was declared as named $name, but was not '
            'passed as an argument named $name.\n\n'
            'BAD:  when(obj.fn(anyNamed: "a")))\n'
            'GOOD: when(obj.fn(a: anyNamed: "a")))');
      }
      if (invocation.namedArguments[nameSymbol] != null) {
        // Clear things out for the next call.
        _storedArgs.clear();
        _storedNamedArgs.clear();
        throw ArgumentError(
            'An ArgumentMatcher was declared as named $name, but a different '
            'value (${invocation.namedArguments[nameSymbol]}) was passed as '
            '$name.\n\n'
            'BAD:  when(obj.fn(b: anyNamed("a")))\n'
            'GOOD: when(obj.fn(b: anyNamed("b")))');
      }
      namedArguments[nameSymbol] = arg;
    });

    return namedArguments;
  }