Dart Maps

map_reference_test.dart

import 'package:flutter_test/flutter_test.dart';

void main() {
  test('should edit the original map as default', () {
    final mockMap = {"item1": "value1"};
    expect(mockMap, {"item1": "value1"});
    removeFirstItemFromOriginalMap(mockMap);
    expect(mockMap, {});
  });
  test('should create a new reference and shouldn\'t edit the original map',
      () {
    final mockMap = {"item1": "value1"};
    expect(mockMap, {"item1": "value1"});
    dontRemoveFirstItemFromOriginalList(mockMap);
    expect(mockMap, {"item1": "value1"});
  });
}

void removeFirstItemFromOriginalMap(Map<String, String> mapParam) {
  mapParam.remove("item1");
}

void dontRemoveFirstItemFromOriginalList(Map<String, String> mapParam) {
  final newMapReference = Map.fromEntries(mapParam.entries);
  newMapReference.remove("item1");
}