public void ConstructorArray_ReturnsRandomArrayWithDistinctElements(int size)
{
var sut = new TestReverser(size);
var array = sut.GetArray();
var arrayGroup = array.GroupBy(x => x);
var duplicateFound = arrayGroup.Any(x => x.Count() > 1);
Assert.False(duplicateFound);
}
public void Reverse_WillReverseEntireArray(int[] input, int[] output)
{
var sut = new TestReverser(1);
sut.SetArray(input);
sut.Reverse(input.Length);
Assert.True(sut.GetArray().SequenceEqual(output));
}
public void GetArrayString_ReturnsSpaceSeparatedElementsOfArrayInStringFormat()
{
var sut = new TestReverser(1);
sut.SetArray(new int[] { 1, 2 });
var result = sut.GetArrayString();
Assert.Equal(" 1 2 ", result);
}
public void IsArrayInOrder_WhenArrayElementsAreNotInNumericAscendingOrder_ReturnsFalse()
{
var sut = new TestReverser(1);
sut.SetArray(new int[] { 2, 1 });
var result = sut.IsArrayInAscendingOrder();
Assert.False(result);
}
public void IsArrayInAscendingOrder_WhenArrayElementsAreInNumericAscendingOrder_ReturnsTrue(int[] input)
{
var sut = new TestReverser(1);
sut.SetArray(input);
var result = sut.IsArrayInAscendingOrder();
Assert.True(result);
}
public void Reverse_WithIndexGreaterThanArrayLength_DoesNothing()
{
var input = new int[] { 1, 2 };
var output = new int[] { 1, 2 };
var sut = new TestReverser(1);
sut.SetArray(input);
sut.Reverse(sut.GetArray().Length + 1);
Assert.True(sut.GetArray().SequenceEqual(output));
}
public void Reverse_WithSpecifiedIndex_ReversesItemsUpToThatIndex()
{
var input = new int[] { 1, 2, 3, 4 };
var output = new int[] { 2, 1, 3, 4 };
var sut = new TestReverser(1);
sut.SetArray(input);
sut.Reverse(2);
Assert.True(sut.GetArray().SequenceEqual(output));
}
public void Reverse_WithIndexLessThanZero_DoesNothing()
{
var input = new int[] { 1, 2 };
var output = new int[] { 1, 2 };
var sut = new TestReverser(1);
sut.SetArray(input);
sut.Reverse(-1);
Assert.True(sut.GetArray().SequenceEqual(output));
}
public void ConstructorArray_MaxElementValueIsEqualToSize(int size)
{
var sut = new TestReverser(size);
Assert.Equal(size, sut.GetArray().Max());
}
public void Constructor_CreatesRandomArrayOfSpecifiedLength(int size)
{
var sut = new TestReverser(size);
Assert.Equal(size, sut.GetArray().Length);
}