import 'dart:math';

import 'package:flutter_test/flutter_test.dart';
import 'package:fitlien_common/utility.dart';

void main() {
  test('Test splitToWords function 1', () {
    List<Word> words = Utility.splitToWords("This is a test sentence.");
    expect(words.length, 5);
    expect(words[0].text, "This");
    expect(words[1].text, "is");
    expect(words[2].text, "a");
    expect(words[3].text, "test");
    expect(words[4].text, "sentence.");
  });

  test('Test splitToWords function 2', () {
    List<Word> words = Utility.splitToWords("This is a another sentence.");
    expect(words.length, 5);
    expect(words[0].text, "This");
    expect(words[1].text, "is");
    expect(words[2].text, "a");
    expect(words[3].text, "another");
    expect(words[4].text, "sentence.");
  });

  test('Comparison test 1', () {
    var text1 = "ab bc cd";
    var text2 = "ab cb cd";
    var deltas = Utility.compare(text1, text2);
    expect(deltas.length, 1);
    expect(deltas[0].wordDeltas.length, 1);
    expect(deltas[0].wordDeltas[0].old!.text, "bc");
    expect(deltas[0].wordDeltas[0].modified!.text, "cb");
  });

  test('Comparison test 2', () {
    var text1 = "ab bc cd";
    var text2 = "ab cb dc";
    var deltas = Utility.compare(text1, text2);
    expect(deltas.length, 1);
    expect(deltas[0].wordDeltas.length, 2);
    expect(deltas[0].wordDeltas[0].old!.text, "bc");
    expect(deltas[0].wordDeltas[0].modified!.text, "cb");
    expect(deltas[0].wordDeltas[1].old!.text, "cd");
    expect(deltas[0].wordDeltas[1].modified!.text, "dc");
  });

  test('Comparison test 3', () {
    var text1 = "ab bc cd fe";
    var text2 = "ab cb cd ef";
    var deltas = Utility.compare(text1, text2);
    expect(deltas.length, 2);
    expect(deltas[0].wordDeltas.length, 1);
    expect(deltas[0].wordDeltas[0].old!.text, "bc");
    expect(deltas[0].wordDeltas[0].modified!.text, "cb");
    expect(deltas[1].wordDeltas.length, 1);
    expect(deltas[1].wordDeltas[0].old!.text, "fe");
    expect(deltas[1].wordDeltas[0].modified!.text, "ef");
  });

  test('Comparison test 4', () {
    var text1 = "ab bc";
    var text2 = "ab cb cd ef";
    var deltas = Utility.compare(text1, text2);
    expect(deltas.length, 2);
    expect(deltas[0].wordDeltas.length, 1);
    expect(deltas[0].wordDeltas[0].old!.text, "bc");
    expect(deltas[0].wordDeltas[0].modified!.text, "cb");
    expect(deltas[1].wordDeltas.length, 2);
    expect(deltas[1].wordDeltas[0].old, null);
    expect(deltas[1].wordDeltas[0].modified!.text, "cd");
    expect(deltas[1].wordDeltas[1].old, null);
    expect(deltas[1].wordDeltas[1].modified!.text, "ef");
  });

  test('Comparison test 5', () {
    var text1 = "ab bc cd ef";
    var text2 = "ab cb";
    var deltas = Utility.compare(text1, text2);
    expect(deltas.length, 2);
    expect(deltas[0].wordDeltas.length, 1);
    expect(deltas[0].wordDeltas[0].old!.text, "bc");
    expect(deltas[0].wordDeltas[0].modified!.text, "cb");
    expect(deltas[1].wordDeltas.length, 2);
    expect(deltas[1].wordDeltas[0].old!.text, "cd");
    expect(deltas[1].wordDeltas[0].modified, null);
    expect(deltas[1].wordDeltas[1].old!.text, "ef");
    expect(deltas[1].wordDeltas[1].modified, null);
  });

  test('Comparison test 6', () {
    var text1 = "ab bc cd ef";
    var text2 = "ab bd cd ef";
    var deltas = Utility.compare(text1, text2);
    expect(deltas.length, 1);
    expect(deltas[0].wordDeltas.length, 1);
    expect(deltas[0].wordDeltas[0].old!.text, "bc");
    expect(deltas[0].wordDeltas[0].modified!.text, "bd");
  });

  test('Comparison test 7', () {
    var text1 = "abc def ghi";
    var text2 = "zbc dkf gha";
    var deltas = Utility.compare(text1, text2);
    expect(deltas.length, 1);
    expect(deltas[0].wordDeltas.length, 3);
    expect(deltas[0].wordDeltas[0].old!.text, "abc");
    expect(deltas[0].wordDeltas[0].modified!.text, "zbc");
    expect(deltas[0].wordDeltas[1].old!.text, "def");
    expect(deltas[0].wordDeltas[1].modified!.text, "dkf");
    expect(deltas[0].wordDeltas[2].old!.text, "ghi");
    expect(deltas[0].wordDeltas[2].modified!.text, "gha");
  });
}