cellular-automata/test/simulation_test.dart

import 'dart:math';

import 'package:mockito/mockito.dart';
import 'package:rules_of_living/src/Grid.dart';
import 'package:rules_of_living/src/Simulation.dart';
import 'package:test/test.dart';

class MockGrid extends Mock implements Grid<bool> {}

void main() {
  Simulation sut;
  setUp(() {
    sut = Simulation(10, 10);
  });
  group("gridSize", () {
    test(
        "returns the width and height of the underlying grid",
        () => expect(
            sut.gridSize, equals(Point<int>(sut.map.width, sut.map.height))));
    test("sets the underlying grid width and height", () {
      sut.gridSize = Point(2, 3);
      expect(sut.gridSize, equals(Point(2, 3)));
    });
    test("creates a new underlying grid on resizing", () {
      var oldMap = sut.map;
      sut.gridSize = Point(10, 10);
      expect(sut.map, isNot(same(oldMap)));
    }, tags: "nobrowser");
  });
  group("resetMap", () {
    test("sets the internal map filled with 'false' ", () {
      sut.map.set(1, 1, true);
      sut.clearMap();
      expect(sut.map, allOf(TypeMatcher<Grid>(), isNot(contains(true))));
    });
    test("sets the simulation to need re-rendering", () {
      sut.dirty = false;
      sut.clearMap();
      expect(sut.dirty, true);
    });
  }, tags: "nobrowser");
  group("save&load", () {
    test(
        "saves a copy of the map which does not change when the actual map changes",
        () {
      sut.saveSnapshot();
      sut.mergeStateChanges({1: true, 2: true});
      var snapshot = Grid.from(sut.map);

      expect(sut.loadSnapshot(), isNot(equals(snapshot)));
    });
  }, tags: "nobrowser");
  group("toggleCellState", () {
    test("throws RangeError if outside the map bounds", () {
      expect(() => sut.toggleCellState(10, 9), throwsRangeError);
    }, tags: const ["nobrowser"]);
    test("sets the cell to false if currently true", () {
      sut.map.set(1, 1, true);
      sut.toggleCellState(1, 1);
      expect(sut.map.get(1, 1), false);
    }, tags: const ["nobrowser"]);
    test("sets the cell to true if currently false", () {
      sut.map.set(1, 1, false);
      sut.toggleCellState(1, 1);
      expect(sut.map.get(1, 1), true);
    }, tags: const ["nobrowser"]);
  });
}