public void countPopulatedChildren()
{
Problem3 p3 = new Problem3();
p3.addNode(5, p3._head);
p3.addNode(1, p3._head);
p3.addNode(1, p3._head);
int expected = 2;
int actual = p3.countChildren(p3._head);
Assert.AreEqual(expected, actual, "Improper count of children");
}
public void findEmptyChildInCurrentNodeChildren()
{
Problem3 p3 = new Problem3();
Node expected = new Node(3);
p3.addNode(2, p3._head);
p3.addNode(1, p3._head);
p3.addNode(1, p3._head);
Node actual = p3.findEmptyChild(p3._head, expected);
Node expectedNode = p3._head.children[0].children[0];
Assert.AreEqual(expected, actual, "Empty child not found");
Assert.AreEqual(expectedNode, actual, "Node not placed in empty child");
}
public void findEmptyChildInCurrentNodeSecondChild()
{
Problem3 p3 = new Problem3();
Node expected = new Node(3);
p3.addNode(2, p3._head);
p3.addNode(2, p3._head);
p3.addNode(1, p3._head);
p3.addNode(1, p3._head);
Node actual = p3.findEmptyChild(p3._head, expected);
Node expectedNode = p3._head.children[0].children[1]; //because we always go down left path
Assert.AreEqual(expected, actual, "Empty child not found");
Assert.AreEqual(expectedNode, actual, "Node not placed in empty child");
}
public void addSecondNodeAsFirstChildToHead()
{
Problem3 p3 = new Problem3();
p3.addNode(2, p3._head);
Node notExpected = null;
Node nodeBeforeAssignment = p3._head.children[0];
int expectedCount = 2;
Node actual = p3.addNode(1, p3._head);
Node expected = p3._head.children[0];
Assert.AreNotEqual(notExpected, actual, "Node not added");
Assert.AreNotEqual(nodeBeforeAssignment, actual, "Node not added as first child");
Assert.AreEqual(expected, actual, "Node not added as first child");
Assert.AreEqual(expectedCount, p3.nodeCount, "Node not added to tree");
}
public void cannotAddNodesWithNegativeValue()
{
Problem3 p3 = new Problem3();
Node expected = null;
int expectedCount = 0;
Node actual = p3.addNode(-5, p3._head);
Assert.AreEqual(expected, actual, "Node wrongly added to tree");
Assert.AreEqual(expectedCount, p3.nodeCount, "Node wrongly added to tree");
}
public void resizePopulatedChildredArrayToNumberOfChildren()
{
Problem3 p3 = new Problem3();
p3.addNode(5, p3._head);
Node expectedChild1 = p3.addNode(1, p3._head);
Node expectedChild2 = p3.addNode(1, p3._head);
int expectedCount = 2;
bool expected = true;
bool actual = p3.changeNodeValue(2, p3._head);
int actualCount = p3._head.children.Length;
Node actualChild1 = p3._head.children[0];
Node actualChild2 = p3._head.children[1];
Assert.AreEqual(expected, actual, "Resize of children array failed");
Assert.AreEqual(expectedCount, actualCount, "Children array not resized");
Assert.AreEqual(expectedChild1, actualChild1, "Children not saved when array resized");
Assert.AreEqual(expectedChild2, actualChild2, "Children not saved when array resized");
}
public void resizeChildredArrayWhenEmpty()
{
Problem3 p3 = new Problem3();
p3.addNode(5, p3._head);
int expectedCount = 2;
bool expected = true;
bool actual = p3.changeNodeValue(2, p3._head);
int actualCount = p3._head.children.Length;
Assert.AreEqual(expected, actual, "Resize of children array failed");
Assert.AreEqual(expectedCount, actualCount, "Children array not resized");
}
public void addFirstNodeAsHead()
{
//arange
Problem3 p3 = new Problem3();
Node notExpected = null;
int expectedCount = 1;
//act
Node actual = p3.addNode(1, p3._head);
Node expected = p3._head;
//assert
Assert.AreNotEqual(notExpected, actual, "Node not added as head");
Assert.AreEqual(expected, actual, "Node not added as head");
Assert.AreEqual(expectedCount, p3.nodeCount, "Node not added to tree");
}
