public void Remove_ManyOccurrence()
{
// Arrange
int[] startCollection = new int[] { 1, 2, 3, 3, 2, 1 };
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(startCollection);
int itemToRemove = 2;
bool expectedRemoveResult = true;
bool expectedContainItemBeforeRemoving = true;
bool exoectedContainItemAfterRemoving = true;
int[] expectedCollection = new int[] { 1, 3, 3, 2, 1 };
// Act
bool actualContainItemBeforeRemoving = reversedCollection.Contains(itemToRemove);
bool actualRemoveResult = reversedCollection.Remove(itemToRemove);
bool actualContainItemAfterRemoving = reversedCollection.Contains(itemToRemove);
// Assert
Assert.AreEqual(expectedRemoveResult, actualRemoveResult);
Assert.AreEqual(expectedContainItemBeforeRemoving, actualContainItemBeforeRemoving);
Assert.AreEqual(exoectedContainItemAfterRemoving, actualContainItemAfterRemoving);
CollectionAssert.Contains(reversedCollection.ToArray(), itemToRemove);
}
public void Indexer_Get()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
Random random = new Random();
// Act
// Assert
CollectionAssert.AreEqual(reversedArray, reversedCollection.ToArray());
// FOR is necessary, needs to check []
// from start to end
for (int i = 0; i < arrayLength; ++i)
{
Assert.AreEqual(reversedArray[i], reversedCollection[i]);
}
// from end to start
for (int i = arrayLength - 1; i >= 0; --i)
{
Assert.AreEqual(reversedArray[i], reversedCollection[i]);
}
// random check
for (int i = 0; i < arrayLength; ++i)
{
int index = random.Next(arrayLength);
Assert.AreEqual(reversedArray[index], reversedCollection[index]);
}
}
public void RemoveAt()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int indexToRemove = 2;
int itemToRemove = 3;
int[] expectedCollection = new int[4] {
5, 4, 2, 1
};
bool expectedHasItemBeforeRemoving = true;
bool actualHasItemBeforeRemoving = reversedArray.Contains(itemToRemove);
bool expectedHasItemAfterRemoving = false;
// Act
reversedCollection.RemoveAt(indexToRemove);
bool actualHasItemAfterRemoving = reversedCollection.Contains(itemToRemove);
int[] actualCollectionAfterRemoving = reversedCollection.ToArray();
// Assert
CollectionAssert.DoesNotContain(actualCollectionAfterRemoving, itemToRemove);
Assert.AreEqual(expectedHasItemBeforeRemoving, actualHasItemBeforeRemoving);
Assert.AreEqual(expectedHasItemAfterRemoving, actualHasItemAfterRemoving);
CollectionAssert.AreEqual(expectedCollection, actualCollectionAfterRemoving);
}
public void Remove_OneOccurrence()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int itemToRemove = 2;
bool expectedRemoveResult = true;
bool expectedContainItemBeforeRemoving = true;
bool exoectedContainItemAfterRemoving = false;
int[] expectedCollection = new int[4] {
5, 4, 3, 1
};
// Act
bool actualContainItemBeforeRemoving = reversedCollection.Contains(itemToRemove);
bool actualRemoveResult = reversedCollection.Remove(itemToRemove);
bool actualContainItemAfterRemoving = reversedCollection.Contains(itemToRemove);
int[] actualCollection = reversedCollection.ToArray();
// Assert
Assert.AreEqual(expectedRemoveResult, actualRemoveResult);
Assert.AreEqual(expectedContainItemBeforeRemoving, actualContainItemBeforeRemoving);
Assert.AreEqual(exoectedContainItemAfterRemoving, actualContainItemAfterRemoving);
CollectionAssert.AreEqual(expectedCollection, actualCollection);
CollectionAssert.DoesNotContain(actualCollection, itemToRemove);
}
public void ReverseConstructor()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
// Act
// Assert
CollectionAssert.AreEqual(expected: reversedArray, actual: reversedCollection.ToArray());
}
public void Indexer_Get_WrongIndex_Exception()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int wrongIndex = Convert.ToInt32(TestContext.DataRow["Index"]);
// Act
// Assert
Assert.ThrowsException <IndexOutOfRangeException>(() => reversedCollection[wrongIndex]);
}
public void RemoveAt_WrongIndex_Exception()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int wrongIndex = Convert.ToInt32(TestContext.DataRow["Index"]);
// Act
// Assert
Assert.ThrowsException <ArgumentOutOfRangeException>(() => reversedCollection.RemoveAt(wrongIndex));
}
public void CopyTo_NullArray_Exception()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int[] copyArray = null;
// Act
// Assert
Assert.ThrowsException <ArgumentNullException>(() => reversedCollection.CopyTo(copyArray, 0));
}
public void CopyTo_SmallerArray_Exception()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int copyIndex = 0;
int[] copyArray = new int[1];
// Act
// Assert
Assert.ThrowsException <ArgumentException>(() => reversedCollection.CopyTo(copyArray, copyIndex));
}
public void IndexOf_WrongItem()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int itemToSearch = int.MaxValue;
int expectedItemIndex = -1;
// Act
int actualItemIndex = reversedCollection.IndexOf(itemToSearch);
// Assert
Assert.AreEqual(expectedItemIndex, actualItemIndex);
}
public void Indexer_Set_WrongIndex_Exception()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int wrongIndex = Convert.ToInt32(TestContext.DataRow["Index"]);
int valueToSet = 10;
// Act
// Assert
CollectionAssert.DoesNotContain(reversedCollection.ToArray(), valueToSet);
Assert.ThrowsException <IndexOutOfRangeException>(() => reversedCollection[wrongIndex] = valueToSet);
CollectionAssert.DoesNotContain(reversedCollection.ToArray(), valueToSet);
}
public void Adding_WithForEach()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>();
// Act
foreach (int item in initialArray)
{
reversedCollection.Add(item);
}
// Assert
CollectionAssert.AreEqual(reversedArray, reversedCollection.ToArray());
}
public void Insert_WrongIndex_Exception()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int valueToAssert = int.MaxValue;
int wrongIndex = Convert.ToInt32(TestContext.DataRow["Index"]);
// Act
// Assert
CollectionAssert.DoesNotContain(reversedCollection.ToArray(), valueToAssert);
Assert.ThrowsException <ArgumentOutOfRangeException>(() => reversedCollection.Insert(wrongIndex, valueToAssert));
CollectionAssert.DoesNotContain(reversedCollection.ToArray(), valueToAssert);
}
public void CopyTo_FromStart()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int startedIndex = 0;
int arrayLength = 5;
int[] copyArray = new int[arrayLength];
// Act
reversedCollection.CopyTo(copyArray, startedIndex);
// Assert
CollectionAssert.AreEqual(reversedArray, copyArray);
}
public void IsEmpty()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>();
bool expectedIsEmptyBeforeAdding = true;
bool actualIsEmptyBeforeAdding = reversedCollection.IsEmpty;
bool expectedIsEmptyAfterAdding = false;
// Act
reversedCollection.Add(1);
bool actualIsEmptyAfterAdding = reversedCollection.IsEmpty;
// Assert
Assert.AreEqual(expectedIsEmptyBeforeAdding, actualIsEmptyBeforeAdding);
Assert.AreEqual(expectedIsEmptyAfterAdding, actualIsEmptyAfterAdding);
}
public void CopyTo_ToMiddle()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int startedIndex = 2;
int arrayLength = 7;
int[] copyArray = new int[arrayLength];
int[] expectedArray = new int[] { 0, 0, 5, 4, 3, 2, 1 };
// Act
reversedCollection.CopyTo(copyArray, startedIndex);
// Assert
CollectionAssert.AreEqual(expectedArray, copyArray);
}
public void Indexer_Set()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int oldItem = Convert.ToInt32(TestContext.DataRow["OldValue"]);
int newItem = Convert.ToInt32(TestContext.DataRow["NewValue"]);
int indexToSet = Convert.ToInt32(TestContext.DataRow["Index"]);
// Act
reversedCollection[indexToSet] = newItem;
int[] actualCollection = reversedCollection.ToArray();
// Assert
CollectionAssert.Contains(actualCollection, newItem);
CollectionAssert.DoesNotContain(actualCollection, oldItem);
}
public void Clear()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>();
int[] expectedCollectionAfterClearing = new int[0];
// Act
foreach (int item in initialArray)
{
reversedCollection.Add(item);
}
reversedCollection.Clear();
// Assert
Assert.IsTrue(reversedCollection.IsEmpty);
CollectionAssert.AreEqual(expectedCollectionAfterClearing, reversedCollection.ToArray());
}
public void CopyTo_BiggerArray_Exception()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int copyIndex = 0;
int[] copyArray = new int[10];
int[] expectedArray = new int[10] {
5, 4, 3, 2, 1, 0, 0, 0, 0, 0
};
// Act
reversedCollection.CopyTo(copyArray, copyIndex);
// Assert
CollectionAssert.AreEquivalent(expectedArray, copyArray);
}
public void Count()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>();
int expectedCountBeforeAdding = 0;
int actualCountBeforeAdding = reversedCollection.Count;
int expectedCountAfterAdding = 5;
// Act
for (int i = 0; i < expectedCountAfterAdding; ++i)
{
reversedCollection.Add(i);
}
int actualCountAfterAdding = reversedCollection.Count;
// Assert
Assert.AreEqual(expectedCountBeforeAdding, actualCountBeforeAdding);
Assert.AreEqual(expectedCountAfterAdding, actualCountAfterAdding);
}
public void Remove_WrongItem_False()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int itemToRemove = int.MaxValue;
bool expectedRemoveResult = false;
bool expectedContainItemBeforeRemoving = false;
bool exoectedContainItemAfterRemoving = false;
// Act
bool actualContainItemBeforeRemoving = reversedCollection.Contains(itemToRemove);
bool actualRemoveResult = reversedCollection.Remove(itemToRemove);
bool actualContainItemAfterRemoving = reversedCollection.Contains(itemToRemove);
// Assert
Assert.AreEqual(expectedRemoveResult, actualRemoveResult);
Assert.AreEqual(expectedContainItemBeforeRemoving, actualContainItemBeforeRemoving);
Assert.AreEqual(exoectedContainItemAfterRemoving, actualContainItemAfterRemoving);
CollectionAssert.DoesNotContain(reversedCollection.ToArray(), itemToRemove);
}
public void Contains()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>();
int elementToSearch = 2;
bool expectedContainsElementBeforeAdding = false;
bool expectedContainsElementAfterAdding = true;
// Act
bool actualContainsElementBeforeAdding = reversedCollection.Contains(elementToSearch);
foreach (int item in initialArray)
{
reversedCollection.Add(item);
}
bool actualContainsElementAfterAdding = reversedCollection.Contains(elementToSearch);
// Assert
Assert.AreEqual(expectedContainsElementBeforeAdding, actualContainsElementBeforeAdding);
Assert.AreEqual(expectedContainsElementAfterAdding, actualContainsElementAfterAdding);
CollectionAssert.Contains(reversedCollection.ToArray(), elementToSearch);
}
public void Adding_ThreeRandom()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>();
int[] baseCollection = new int[3]
{
Convert.ToInt32(TestContext.DataRow["First"]),
Convert.ToInt32(TestContext.DataRow["Second"]),
Convert.ToInt32(TestContext.DataRow["Third"])
};
int[] expectedCollection = baseCollection.Reverse().ToArray();
// Act
foreach (int item in baseCollection)
{
reversedCollection.Add(item);
}
int[] actualCollection = reversedCollection.ToArray();
// Assert
CollectionAssert.AreEqual(expectedCollection, actualCollection);
}
public void Insert()
{
// Arrange
ReverseCollection <int> reversedCollection = new ReverseCollection <int>(initialArray);
int insertedElement = 10;
int insertedIndex = 2;
int[] expectedCollectionBeforeInserting = reversedArray;
int[] actualCollectionBeforeInserting = reversedCollection.ToArray();
int[] expectedCollectionAfterInserting = new int[6] {
5, 4, insertedElement, 3, 2, 1
};
// Act
reversedCollection.Insert(insertedIndex, insertedElement);
int[] actualCollectionAfterInserting = reversedCollection.ToArray();
// Assert
CollectionAssert.Contains(actualCollectionAfterInserting, insertedElement);
CollectionAssert.AreEqual(expectedCollectionBeforeInserting, actualCollectionBeforeInserting);
CollectionAssert.AreEqual(expectedCollectionAfterInserting, actualCollectionAfterInserting);
}