public FileSizeStatistics EvaluateFileSizeStatistics(uint inputFileSize, uint outputFileSize, uint headerSize)
{
FileSizeStatistics statistics = new FileSizeStatistics();
statistics.InputFileSize = inputFileSize;
statistics.OutputFileSize = outputFileSize;
statistics.OutputFileSizeWithHeader = outputFileSize + headerSize;
double compressionRatio = (double)outputFileSize / (double)inputFileSize;
double compressionRatioWithHeader = (double)statistics.OutputFileSizeWithHeader / (double)inputFileSize;
statistics.CompressionRatio = Math.Round(compressionRatio, DECIMAL_DIGITS);
statistics.CompressionRatioWithHeader = Math.Round(compressionRatioWithHeader, DECIMAL_DIGITS);
return(statistics);
}
public void FileSize_EvaluateStatistics()
{
var helper = new HuffmanStatisticsHelper();
uint inputFileSize = 100;
uint outputFileSize = 50;
uint headerSize = 10;
FileSizeStatistics expectedStatistics = new FileSizeStatistics();
expectedStatistics.InputFileSize = 100;
expectedStatistics.OutputFileSize = 50;
expectedStatistics.OutputFileSizeWithHeader = 60;
expectedStatistics.CompressionRatio = 0.5;
expectedStatistics.CompressionRatioWithHeader = 0.6;
FileSizeStatistics statistics = helper.EvaluateFileSizeStatistics(inputFileSize, outputFileSize, headerSize);
Assert.AreEqual(expectedStatistics.InputFileSize, statistics.InputFileSize);
Assert.AreEqual(expectedStatistics.OutputFileSize, statistics.OutputFileSize);
Assert.AreEqual(expectedStatistics.OutputFileSizeWithHeader, statistics.OutputFileSizeWithHeader);
Assert.AreEqual(expectedStatistics.CompressionRatio, statistics.CompressionRatio);
Assert.AreEqual(expectedStatistics.CompressionRatioWithHeader, statistics.CompressionRatioWithHeader);
}
