public void NumbersHolder_DefaultConstructor_ResturnsEmptyArray()
{
//Arrange
var numbersHolder = new NumbersHolder();
//Act
//numbersHolder.Add(0);
var result = numbersHolder.Fetch();
//Assert
//Assert.Empty(result);
result.Should().BeEmpty("because we do not put anything there");
}
public void RemoveAsync_FromEmpty_ThrowsInvalidOperationException()
{
//Arrange
var holder = new NumbersHolder();
//Act
Func <Task> func = () => holder.RemoveAsync();
Task Act() => holder.RemoveAsync();
//Assert
//Assert.ThrowsAsync<InvalidOperationException>(func);
Assert.ThrowsAsync <InvalidOperationException>(Act);
func.Should().ThrowAsync <InvalidOperationException>().WithMessage("message");
}
public async Task RemoveAsync_RemoveSingleNumber_CountZero()
{
//Arrange
var value = new Faker().Random.Number();
var holder = new NumbersHolder();
holder.Add(value);
//Act
await holder.RemoveAsync();
var result = holder.Count;
//Assert
Assert.Equal(value, result);
result.Should().Be(value);
}
public void Add_SingleNumber_ResultsSameSingleNumber()
{
//Arrange
var holder = new NumbersHolder();
int number = default;
//Act
holder.Add(number);
//holder.Add(3);
var result = holder.Fetch();
//Assert
// Assert.Equal(new[] { number }, result);
// Assert.Single(result);
// Assert.Single(result, number);
using (new AssertionScope())
{
//5.Should().Be(-5);
result.Should().ContainSingle().And.Contain(number);
}
}
