public void ExecutionTimeTest()
{
string fileName = "BigFileTest.txt";
try
{
File.Delete(fileName);
}
catch
{ };
int iterations = 1000000;
using (StreamWriter sw = new StreamWriter(fileName))
{
for (int i = 0; i < iterations; i++)
{
sw.WriteLine("abc, def - ghi. Abc. ");
}
sw.Close();
}
IDictionary <string, int> calculatedAnswer = new Dictionary <string, int>();
IWordCounter wc = CreateInstance();
Stopwatch stopwatch = new Stopwatch();
//0 current
//1 - next
using (StreamReader sr = new StreamReader(fileName))
{
stopwatch.Start();
bool isLastChar = false;
int[] readValues = new int[2] {
-1, -1
};
readValues[0] = sr.Read();
readValues[1] = sr.Read();
if (readValues[0] == -1)
{
return;
}
if (readValues[0] != -1 && readValues[1] == -1)
{
isLastChar = true;
}
wc.CalculateChar((char)readValues[0], isLastChar);
while (isLastChar == false)
{
readValues[0] = readValues[1];
readValues[1] = sr.Read();
if (readValues[0] != -1 && readValues[1] == -1)
{
isLastChar = true;
}
wc.CalculateChar((char)readValues[0], isLastChar);
}
calculatedAnswer = wc.GetCurrentFinishedWordCounter();
stopwatch.Stop();
sr.Close();
}
IDictionary <string, int> correctAnswer = new Dictionary <string, int>();
correctAnswer["abc"] = 2 * iterations;
correctAnswer["def"] = 1 * iterations;
correctAnswer["ghi"] = 1 * iterations;
AssertCorrectness(calculatedAnswer, correctAnswer);
long elapsedTimeinMs = stopwatch.ElapsedMilliseconds;
long expectedElapsedTime = (long)(0.006 * iterations);
Assert.IsFalse(elapsedTimeinMs > expectedElapsedTime, string.Format("Processing time too long. Actual: {0}, Expected {1}", elapsedTimeinMs, expectedElapsedTime));
}