public void CartesianProduct_WhenInput1IsNotNullAndInput2IsNull_ReturnsAnEmptyArray()
{
int[] array1 = { 1, 2, 3 };
int[] array2 = null;
// act
int[][] result = ArrayHelper.CartesianProduct(array1, array2);
// assert
Assert.Empty(result);
}
public void CartesianProduct_WhenBothOfTheInputsAreNull_ReturnsAnEmptyArray()
{
int[] array1 = null;
int[] array2 = null;
// act
int[][] result = ArrayHelper.CartesianProduct(array1, array2);
// assert
Assert.Empty(result);
}
public void CartesianProduct_WhenInput1IsNotNullAndInput2IsNotNull_ReturnsExpectedResults()
{
int[] array1 = { 1, 2, 3 };
int[] array2 = { 4, 5, 6 };
int[][] expected = new int[9][]
{
new[] { 1, 4 },
new[] { 1, 5 },
new[] { 1, 6 },
new[] { 2, 4 },
new[] { 2, 5 },
new[] { 2, 6 },
new[] { 3, 4 },
new[] { 3, 5 },
new[] { 3, 6 },
};
// act
int[][] result = ArrayHelper.CartesianProduct(array1, array2);
// assert
Assert.Equal(expected, result);
}