public void InputEmptyArray_GetEmptyList()
{
int[] array = { };
var result = new FourSum_18().FourSum(array, 1);
Assert.Equal(0, result.Count);
}
public void InputNotEnoughLengthArray_GetEmptyList()
{
int[] array = { 1, 2, 3 };
var result = new FourSum_18().FourSum(array, 3);
Assert.Equal(0, result.Count);
}
public void InputAllZeroArray_GetOneLists()
{
int[] array = { 0, 0, 0, 0, 0, 0, 0, 0 };
var result = new FourSum_18().FourSum(array, 0);
Assert.Equal(1, result.Count);
Assert.True(result[0].ContainsSameElement(new[] { 0, 0, 0, 0 }));
}
public void InputNormalArray_GetThreeLists()
{
int[] array = { 1, 0, -1, 0, -2, 2 };
var result = new FourSum_18().FourSum(array, 0);
Assert.Equal(3, result.Count);
Assert.True(result[0].ContainsSameElement(new[] { -2, -1, 1, 2 }));
Assert.True(result[1].ContainsSameElement(new[] { -2, 0, 0, 2 }));
Assert.True(result[2].ContainsSameElement(new[] { -1, 0, 0, 1 }));
}
