public void Should_Return_Exactly_Length()
{
int length = 2;
long numb = NumberGenerator.GeneratePositiveLong(length);
Assert.Equal(length, numb.ToString().Length);
}
public void GeneratePositiveLong_ValidArgument_ReturnsANumberWithAGivenNumberOfDigits(int testArgument)
{
//arrange
//act
long result = NumberGenerator.GeneratePositiveLong(testArgument);
//assert
result.ToString().Should().HaveLength(testArgument);
}
public void GeneratePositiveLong_InvalidArgument_ThrowsArgumentOutOfRangeException(int testArgument)
{
//arrange
//act
Action act = () => NumberGenerator.GeneratePositiveLong(testArgument);
//assert
act.Should().ThrowExactly <ArgumentOutOfRangeException>().WithMessage("Length must be positive value (Parameter 'length')");
}
public void GeneratePositiveLong_Should_Retur_Valid_Length()
{
var expectedLength = NumberGenerator.GeneratePositiveLong(3).ToString().Length;
var length = NumberGenerator.GeneratePositiveLong(3).ToString().Length;
Assert.Equal(expectedLength, length);
Assert.Equal(3, length);
for (int i = 1; i < 19; i++)
{
//Assert.Equal(i, NumberGenerator.GeneratePositiveLong(i).ToString().Length);
Assert.True(NumberGenerator.GeneratePositiveLong(i).ToString().Length == i);
}
}
public void GeneratePositiveLong_Should_Fail_If_Argument_Invalid()
{
Assert.Throws <ArgumentOutOfRangeException>(() => NumberGenerator.GeneratePositiveLong(-4));
Assert.Throws <ArgumentOutOfRangeException>(() => NumberGenerator.GeneratePositiveLong(0));
Assert.Throws <ArgumentOutOfRangeException>(() => NumberGenerator.GeneratePositiveLong(19));
}
public void GeneratePositiveLong_Returns_Number_With_LengthFromArgument(int length)
{
var actual = NumberGenerator.GeneratePositiveLong(length).ToString().Length;
Assert.Equal(length, actual);
}
public void GeneratePositiveLong_Throws_ArgumentOutOfRangeException_If_Parameter_Invalid(int length)
{
Assert.Throws <ArgumentOutOfRangeException>(() => NumberGenerator.GeneratePositiveLong(length));
}
public void ReturnNumberWithGivenNumberOfCharacters(int length)
{
int lengthAfter = NumberGenerator.GeneratePositiveLong(length).ToString().Length;
Assert.Equal(lengthAfter, length);
}
public void IfArgumentIsInvalidThrowArgumentException(int length)
{
var action = new Action(() => NumberGenerator.GeneratePositiveLong(length));
Assert.ThrowsAny <ArgumentException>(action);
}
public void Should_Throw_ArgumentException()
{
Assert.Throws <ArgumentOutOfRangeException>(() => NumberGenerator.GeneratePositiveLong(-2));
}
public void ReturnNumberLongAsArgument()
{
var length = new Random().Next(1, 10);
Assert.Equal(NumberGenerator.GeneratePositiveLong(length).ToString().Length, length);
}
public void ThrowExceptionWhenArgumentIsNotValid()
{
Assert.Throws <ArgumentOutOfRangeException>(() => NumberGenerator.GeneratePositiveLong(-1));
Assert.Throws <ArgumentOutOfRangeException>(() => NumberGenerator.GeneratePositiveLong(20));
}
