public void AddBigNumbers_TwoNumbersWithCarry_ReturnsValue()
{
// arrange
int[] a = { 1, 2, 3 };
int[] b = { 9, 3, 4 };
int[] expected = { 1, 0, 5, 7 };
MathOperations m = new MathOperations();
// act
int[] actual = m.AddBigNumbers(a, b);
// assert
Assert.IsTrue(expected.SequenceEqual(actual));
}
public void DivideNoOperator_RandomSamples_ReturnsValue()
{
Random r = new Random(1234);
for (int i = 0; i < 100000; i++)
{
// arrange
int a = r.Next(10000);
int b = r.Next(1, 100);
DivisionResult expected = new DivisionResult();
expected.Divisor = a / b;
expected.Remainder = a % b;
MathOperations m = new MathOperations();
// act
DivisionResult actual = m.DivideNoOperand(a, b);
// assert
Assert.AreEqual(expected.Remainder, actual.Remainder);
Assert.AreEqual(expected.Divisor, actual.Divisor);
}
}
public void DivideNoOperator_ValidValues_ReturnsValue()
{
// arrange
int a = 10;
int b = 2;
DivisionResult expected = new DivisionResult();
expected.Divisor = a / b;
expected.Remainder = a % b;
MathOperations m = new MathOperations();
// act
DivisionResult actual = m.DivideNoOperand(a, b);
// assert
Assert.AreEqual(expected.Divisor, actual.Divisor);
Assert.AreEqual(expected.Remainder, actual.Remainder);
}
public void SquareRoot_ValidValues_ReturnsExpected()
{
// arrange
double a = 100;
MathOperations m = new MathOperations();
double expected = 10;
double error = 0.1;
// act
double actual = m.SquareRoot(a, error);
// assert
Assert.IsTrue(Math.Abs(actual * actual - expected * expected) < error);
}
public void SquareRoot_RandomSamples_ReturnsValue()
{
Random r = new Random(1234);
for (int i = 0; i < 100000; i++)
{
// arrange
double a = r.NextDouble() * (i % 10);
MathOperations m = new MathOperations();
double expected = Math.Sqrt(a);
double error = 0.001;
// act
double actual = m.SquareRoot(a, error);
// assert
Assert.IsTrue(Math.Abs(actual * actual - expected * expected) < error);
}
}
public void MultiplyBigNumbers_TwoNumbers_ReturnsValue()
{
// arrange
int[] a = { 1, 7 };
int[] b = { 3, 4 };
int[] expected = { 0, 5, 7, 8, };
MathOperations m = new MathOperations();
// act
int[] actual = m.Multiply(a, b);
// assert
Assert.IsTrue(expected.SequenceEqual(actual));
}