Noticeably Different - Unit Testing

using System.Noticeably.Different.WebSite;

November 19, 2008 NoticeablyDifferent

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Testing The Builder Pattern

#region Code

public class Director {

IBuilder builder;

public Director(IBuilder builder) {

this.builder = builder;

}

public void Construct() {

builder.BuildPart();

}

public interface IBuilder {

void BuildPart();

}

public class ConcreteBuilder : IBuilder {

Product product = new Product();

public void BuildPart() {

product.Part = "Some value";

}

public Product GetResult() {

return product;

}

public class Product {

private string part = string.Empty;

public string Part {

get { return part; }

set { part = value; }

}

#endregion

#region Unit Tests

public class MockBuilder : IBuilder {

public bool buildPartCalled = false;

public void BuildPart() {

buildPartCalled = true;

}

[TestFixture]

public class DirectorTests {

Director director;

MockBuilder builder;

[SetUp]

public void SetUp() {

builder = new MockBuilder();

director = new Director(builder);

}

[Test]

public void ConstructCallsBuildPartInBuilder() {

Assert.IsFalse(builder.buildPartCalled, "BuildPart not called");

director.Construct();

Assert.IsTrue(builder.buildPartCalled, "BuildPart called");

}

[TestFixture]

public class BuilderTests {

ConcreteBuilder builder;

[SetUp]

public void SetUp() {

builder = new ConcreteBuilder();

}

[Test]

public void GetResultDoesNotReturnNullObject() {

Assert.IsNotNull(builder.GetResult());

}

[Test]

public void BuildPartSetsPartInProduct() {

Product productPriorToBuildPart = builder.GetResult();

Assert.AreEqual(0, productPriorToBuildPart.Part.Length,

"Product's Part initialized properly");

builder.BuildPart();

Product productAfterBuildPartCalled = builder.GetResult();

Assert.AreEqual("Some value", productPriorToBuildPart.Part,

"Product's Part affected properly by BuildPart");

}

[TestFixture]

public class ProductTests {

Product product;

[SetUp]

public void SetUp() {

product = new Product();

}

[Test]

public void PartSetAndRetrieved() {

string someValue = "Some value";

Assert.AreEqual(0, product.Part.Length,

"Product value initialized");

product.Part = someValue;

Assert.AreEqual(someValue, product.Part,

"Product value retrieved");

}

#endregion