public void Test_SmallFile_Negative_Top10()
{
using (var testStreamWriter = new TestStreamWriter(new MemoryStream()))
{
FileSorter sorter = new FileSorter();
sorter.TopN(GetFullTestDataPath("Valid_10Numbers_Negative.txt"), 10, testStreamWriter);
int[] expected = new int[] { 9, 8, 6, 5, 4, 3, 2, 0, -1, -7 };
int[] actual = testStreamWriter.Data;
Assert.AreEqual(expected, actual);
}
}
public void Test_SmallFile_Distinct_Top5()
{
using (var testStreamWriter = new TestStreamWriter(new MemoryStream()))
{
FileSorter sorter = new FileSorter();
sorter.TopN(GetFullTestDataPath("Valid_10Numbers_Distinct.txt"), 5, testStreamWriter);
int[] expected = new int[] { 9, 8, 7, 6, 5 };
int[] actual = testStreamWriter.Data;
Assert.AreEqual(expected, actual);
}
}
public void Test_SmallFile_Duplicates_Top3()
{
using (var testStreamWriter = new TestStreamWriter(new MemoryStream()))
{
FileSorter sorter = new FileSorter();
sorter.TopN(GetFullTestDataPath("Valid_10Numbers_Duplicates.txt"), 3, testStreamWriter);
int[] expected = new int[] { 8, 8, 6 };
int[] actual = testStreamWriter.Data;
Assert.AreEqual(expected, actual);
}
}
public void Test_MediumFile_Duplicates_Top4()
{
using (var testStreamWriter = new TestStreamWriter(new MemoryStream()))
{
FileSorter sorter = new FileSorter();
int resultsReturned = sorter.TopN(
GetFullTestDataPath("Valid_1000000Numbers_Duplicates.txt"), 4, testStreamWriter);
int[] expected = new int[] { 2147483422, 2147483421, 2147483421, 2147483420 };
int[] actual = testStreamWriter.Data;
Assert.AreEqual(expected, actual);
}
}
public void Test_SmallFile_Distinct_Top14()
{
// Asking for the top 14 numbers, but file only contains 10 numbers
using (var testStreamWriter = new TestStreamWriter(new MemoryStream()))
{
FileSorter sorter = new FileSorter();
int resultsReturned = sorter.TopN(
GetFullTestDataPath("Valid_10Numbers_Distinct.txt"), 14, testStreamWriter);
int[] expected = new int[] { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
int[] actual = testStreamWriter.Data;
Assert.AreEqual(expected, actual);
Assert.AreEqual(10, resultsReturned);
}
}
