public void TestExample()
{
using (StringWriter sw = new StringWriter())
{
IOU mattsIOU = new IOU();
mattsIOU.ChangeDebt("Arthur", 51);
mattsIOU.ChangeDebt("Michael", 30);
TextWriter stdout = Console.Out;
Console.SetOut(sw);
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Arthur"));
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Michael"));
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Heikki"));
Console.SetOut(stdout);
// Assert
Assert.AreEqual("51\n30\n0\n", sw.ToString().Replace("\r\n", "\n"), "The example should work!");
}
}
public void TestMultipleChanges()
{
using (StringWriter sw = new StringWriter())
{
TextWriter stdout = Console.Out;
Console.SetOut(sw);
IOU mattsIOU = new IOU();
mattsIOU.ChangeDebt("Heikki", 81);
mattsIOU.ChangeDebt("Heikki", -30);
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Heikki"));
mattsIOU.ChangeDebt("Heikki", 20);
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Heikki"));
mattsIOU.ChangeDebt("Heikki", 80);
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Heikki"));
mattsIOU.ChangeDebt("Heikki", -121);
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Heikki"));
Console.SetOut(stdout);
Assert.AreEqual("51\n71\n151\n30\n", sw.ToString().Replace("\r\n", "\n"), "Multiple changes should change the value multiple times!");
}
}
public void TestSecondExample()
{
using (StringWriter sw = new StringWriter())
{
TextWriter stdout = Console.Out;
Console.SetOut(sw);
IOU mattsIOU = new IOU();
mattsIOU.ChangeDebt("Arthur", -10);
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Arthur"));
mattsIOU.ChangeDebt("Arthur", 51);
mattsIOU.ChangeDebt("Arthur", 30);
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Arthur"));
mattsIOU.ChangeDebt("Arthur", -30);
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Arthur"));
mattsIOU.ChangeDebt("Arthur", -80);
Console.WriteLine(mattsIOU.HowMuchDoIOweTo("Arthur"));
Console.SetOut(stdout);
Assert.AreEqual("0\n81\n51\n0\n", sw.ToString().Replace("\r\n", "\n"), "The second example should work!");
}
}
public void TestSimpleNegativeAdd()
{
using (StringWriter sw = new StringWriter())
{
IOU myIou = new IOU();
myIou.ChangeDebt("You", -69);
TextWriter stdout = Console.Out;
Console.SetOut(sw);
Console.WriteLine(myIou.HowMuchDoIOweTo("You"));
Console.SetOut(stdout);
// Assert
Assert.AreEqual("0\n", sw.ToString().Replace("\r\n", "\n"), "Initial negative should not add debt!");
}
}
public void TestSimpleAdd()
{
using (StringWriter sw = new StringWriter())
{
IOU myIou = new IOU();
myIou.ChangeDebt("You", 69);
TextWriter stdout = Console.Out;
Console.SetOut(sw);
Console.WriteLine(myIou.HowMuchDoIOweTo("You"));
Console.SetOut(stdout);
// Assert
Assert.AreEqual("69\n", sw.ToString().Replace("\r\n", "\n"), "Single Change should still update the value!");
}
}