Learning Dart

dart/difference-of-squares/test/difference_of_squares_test.dart

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+import 'package:difference_of_squares/difference_of_squares.dart';
+import 'package:test/test.dart';
+
+final differenceOfSquares = DifferenceOfSquares();
+
+void main() {
+  group('DifferenceOfSquares: Square the sum of the numbers up to the given number - ',
+      squareTheSumOfTheNumbersUpToTheGivenNumber);
+  group('DifferenceOfSquares: Sum the squares of the numbers up to the given number - ',
+      sumTheSquaresOfTheNumbersUpToTheGivenNumber);
+  group('DifferenceOfSquares: Subtract sum of squares from square of sums - ', subtractSumOfSquaresFromSquareOfSums);
+}
+
+void squareTheSumOfTheNumbersUpToTheGivenNumber() {
+  test('square of sum 1', () {
+    final result = differenceOfSquares.squareOfSum(1);
+    expect(result, equals(1));
+  }, skip: false);
+
+  test('square of sum 5', () {
+    final result = differenceOfSquares.squareOfSum(5);
+    expect(result, equals(225));
+  }, skip: false);
+
+  test('square of sum 100', () {
+    final result = differenceOfSquares.squareOfSum(100);
+    expect(result, equals(25502500));
+  }, skip: false);
+}
+
+void sumTheSquaresOfTheNumbersUpToTheGivenNumber() {
+  test('sum of squares 1', () {
+    final result = differenceOfSquares.sumOfSquares(1);
+    expect(result, equals(1));
+  }, skip: false);
+
+  test('sum of squares 5', () {
+    final result = differenceOfSquares.sumOfSquares(5);
+    expect(result, equals(55));
+  }, skip: false);
+
+  test('sum of squares 100', () {
+    final result = differenceOfSquares.sumOfSquares(100);
+    expect(result, equals(338350));
+  }, skip: false);
+}
+
+void subtractSumOfSquaresFromSquareOfSums() {
+  test('difference of squares 1', () {
+    final result = differenceOfSquares.differenceOfSquares(1);
+    expect(result, equals(0));
+  }, skip: false);
+
+  test('difference of squares 5', () {
+    final result = differenceOfSquares.differenceOfSquares(5);
+    expect(result, equals(170));
+  }, skip: false);
+
+  test('difference of squares 100', () {
+    final result = differenceOfSquares.differenceOfSquares(100);
+    expect(result, equals(25164150));
+  }, skip: false);
+}