public void TestNullArticleContent()
{
Article a = new Article();
var result = StringHelper.CalculateMostCommonCharacter(a);
Assert.IsTrue(true, "This test should throw an exception before this line executes.");
}
public static ArticleInfo CalculateMostCommonCharacter(Article input, StringHelperOptions options = null)
{
if (input == null) throw new ArgumentNullException("Article cannot be null.");
if (input.Content == null) throw new ArgumentNullException("Article.Content cannot be null.");
if (options == null) options = defaultOptions;
var chars = new Dictionary<char, int>();
var output = new ArticleInfo();
output.Article = input;
foreach (var c in input.Content)
{
if (options.IgnoreSpaces && c == ' ') continue;
if (!chars.ContainsKey(c)) chars[c] = 0;
chars[c]++;
}
foreach (var kvp in chars)
{
if (output.MostCommonCharacterCount < kvp.Value)
{
output.MostCommonCharacter = kvp.Key;
output.MostCommonCharacterCount = kvp.Value;
}
}
return output;
}
public void TestEmptyArticleContent()
{
var NULL_TERMINATOR = '\0';
Article a = new Article()
{
Content = ""
};
var result = StringHelper.CalculateMostCommonCharacter(a);
Assert.AreEqual(NULL_TERMINATOR, result.MostCommonCharacter, "Empty article contents should return the null terminator as the most common character.");
Assert.AreEqual(0, result.MostCommonCharacterCount, "Empty article contents should return the 0 as the most common character count.");
}
public void TestPunctuation()
{
var expected = '&';
var expectedCount = 7;
Article a = new Article()
{
Content = "!@@###$$$$%%%%%^^^^^^&&&&&&&"
};
var result = StringHelper.CalculateMostCommonCharacter(a);
Assert.AreEqual(expected, result.MostCommonCharacter, "Punctuation should count as a character.");
Assert.AreEqual(expectedCount, result.MostCommonCharacterCount, "Punctuation should be counted accurately.");
}
public void TestTies()
{
var expected = 'a';
var expectedCount = 2;
Article a = new Article()
{
Content = "aabb"
};
var result = StringHelper.CalculateMostCommonCharacter(a);
Assert.AreEqual(expected, result.MostCommonCharacter, "Ties should go to the character found first.");
Assert.AreEqual(expectedCount, result.MostCommonCharacterCount, "Ties should be counted accurately.");
}
public void TestCalculateMostCommonCharacter()
{
var expected = 'a';
var expectedCount = 2;
Article a = new Article()
{
Content = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!@#$%^&*()_+a"
};
var result = StringHelper.CalculateMostCommonCharacter(a);
Assert.AreEqual(expected, result.MostCommonCharacter, "The most common character should be found in the input string.");
Assert.AreEqual(expectedCount, result.MostCommonCharacterCount, "The most common character found in the input string should be counted accurately.");
}
private static void Process(string path)
{
// Load file contents
// Calculate most common character
// Save result
var a = new Article() { Path = path };
a.Content = File.ReadAllText(path);
var ai = StringHelper.CalculateMostCommonCharacter(a, options);
ai.Article = a;
// Could do many things here... send off to a storage service, put it on a queue for further processing, etc.
// We'll keep it simple and serialize this out to a simple json file.
File.WriteAllText(string.Format("article-info-{0}", path), JsonConvert.SerializeObject(ai));
}
public void TestIgnoreSpaces()
{
var expected = 'b';
var expectedCount = 1;
Article a = new Article()
{
Content = "h e l l o "
};
var result = StringHelper.CalculateMostCommonCharacter(a, new StringHelperOptions() { IgnoreSpaces = true });
Assert.AreEqual(expected, result.MostCommonCharacter, "Punctuation should count as a character.");
Assert.AreEqual(expectedCount, result.MostCommonCharacterCount, "Punctuation should be counted accurately.");
}
