elmah.ir-post89-code1.cs

using System;
using System.Linq;
using NUnit.Framework;

namespace ThirtyDaysOfTDD.UnitTests
{
  [TestFixture]
  public class StringUtilsTest
  {
    [Test]
    public void ShouldBeAbleToCountNumberOfLettersInSimpleSentence()
    {
      var sentenceToScan = "TDD is awesome!";
      var characterToScanFor = "e";
      var expectedResult = 2;
      var stringUtils = new StringUtils();

      int result = stringUtils.FindNumberOfOccurences(sentenceToScan, characterToScanFor);

      Assert.AreEqual(expectedResult, result);
    }

    [Test]
    public void ShouldBeAbleToCountNumberOfLettersInAComplexSentence()
    {
      var sentenceToScan = "Once is unique, twice is a coincidence, three times is a pattern.";
      var characterToScanFor = "n";
      var expectedResult = 5;
      var stringUtils = new StringUtils();

      int result = stringUtils.FindNumberOfOccurences(sentenceToScan, characterToScanFor);

      Assert.AreEqual(expectedResult, result);
    }

    [Test]
    [ExpectedException(typeof(ArgumentException))]
    public void ShouldGetAnArgumentExceptionWhenCharacterToScanForIsLargerThanOneCharacter()
    {
      var sentenceToScan = "This test should throw an exception";
      var characterToScanFor = "xx";
      var stringUtils = new StringUtils();

      stringUtils.FindNumberOfOccurences(sentenceToScan, characterToScanFor);
    }
  }
}