public void Describe_Given_NoChildrenNode_Returns_NoChildrenNodeDescription()
{
//arrange
var expected = "new NoChildrenNode(\"root\")";
var testInput = new NoChildrenNode("root");
//act
var actual = _nodeDescriber.Describe(testInput);
//assert
Assert.AreEqual(expected, actual);
}
public void NodeDescriberTest()
{
// Traverse down and across tree
INodeDescriber implementation = new NodeDescriber(new NodesHelper());
var testData = new SingleChildNode("root",
new TwoChildrenNode("child1",
new NoChildrenNode("leaf1"),
new SingleChildNode("child2",
new NoChildrenNode("leaf2"))));
var result = implementation.Describe(testData);
StringBuilder sb = new StringBuilder();
sb.Append("new SingleChildNode(\"root\","); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append("new TwoChildrenNode(\"child1\","); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append(tab); sb.Append("new NoChildrenNode(\"leaf1\"),"); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append(tab); sb.Append("new SingleChildNode(\"child2\","); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append(tab); sb.Append(tab); sb.Append("new NoChildrenNode(\"leaf2\"))));");
string expectedResult = sb.ToString();
Assert.AreEqual(expectedResult, result);
// Traverse down tree, back up, then back down
implementation = new NodeDescriber(new NodesHelper());
testData = new SingleChildNode("root",
new ManyChildrenNode("child1",
new SingleChildNode("child2",
new NoChildrenNode("leaf1")),
new NoChildrenNode("leaf2")));
result = implementation.Describe(testData);
sb = new StringBuilder();
sb.Append("new SingleChildNode(\"root\","); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append("new ManyChildrenNode(\"child1\","); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append(tab); sb.Append("new SingleChildNode(\"child2\","); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append(tab); sb.Append(tab); sb.Append("new NoChildrenNode(\"leaf1\")),"); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append(tab); sb.Append("new NoChildrenNode(\"leaf2\")));");
expectedResult = sb.ToString();
Assert.AreEqual(expectedResult, result);
// Traverse tree, removing null nodes
implementation = new NodeDescriber(new NodesHelper());
var testDataWithNulls = new ManyChildrenNode("root",
new TwoChildrenNode("child1",
null,
new SingleChildNode("leaf1",
null)));
result = implementation.Describe(testDataWithNulls);
sb = new StringBuilder();
sb.Append("new ManyChildrenNode(\"root\","); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append("new TwoChildrenNode(\"child1\","); sb.Append(Environment.NewLine);
sb.Append(tab); sb.Append(tab); sb.Append("new SingleChildNode(\"leaf1\")));");
expectedResult = sb.ToString();
Assert.AreEqual(expectedResult, result);
}