public void TestConsumeTwice()
{
var enumerable = new MergedLinesEnumerable(new StringReader("a"), new StringReader("b"));
enumerable.GetEnumerator();
UnitTestHelpers.AssertThrows <InvalidOperationException>(() => enumerable.GetEnumerator());
}
public void TestBothArePopulatedEqualSizes()
{
var list = new MergedLinesEnumerable(
new StringReader("a\nbb\nccc"),
new StringReader("1\r\n22\r\n333")
)
.ToList();
string.Join(", ", list).ShouldEqual("a, 1, bb, 22, ccc, 333");
}
public void TestBothArePopulatedDifferenceSizes()
{
var lines1 = string.Join("\n", new[] { "x", "y", "z" });
var lines2 = string.Join("\n", new[] { "1", "2", "3", "4", "5" });
var list1 = new MergedLinesEnumerable(new StringReader(lines1), new StringReader(lines2))
.ToList();
string.Join(", ", list1).ShouldEqual("x, 1, y, 2, z, 3, 4, 5");
var list2 = new MergedLinesEnumerable(new StringReader(lines2), new StringReader(lines1))
.ToList();
string.Join(", ", list2).ShouldEqual("1, x, 2, y, 3, z, 4, 5");
}
public void TestOneIsEmpty()
{
var empty1 = new StringReader(string.Empty);
var nonEmpty1 = new StringReader("abc\r\ndef\r\nghi\r\njkl");
var enumerable1 = new MergedLinesEnumerable(empty1, nonEmpty1);
var list1 = enumerable1.ToList();
list1.SequenceEqual(new[] { "abc", "def", "ghi", "jkl" })
.ShouldEqual(true, string.Join(", ", list1));
var empty2 = new StringReader(string.Empty);
var nonEmpty2 = new StringReader("a\nbb\nccc\n");
var enumerable2 = new MergedLinesEnumerable(nonEmpty2, empty2);
var list2 = enumerable2.ToList();
list2.SequenceEqual(new[] { "a", "bb", "ccc" })
.ShouldEqual(true, string.Join(", ", list2));
}
public void FuzzTest()
{
var pipe1 = new Pipe();
var pipe2 = new Pipe();
var enumerable = new MergedLinesEnumerable(new StreamReader(pipe1.OutputStream), new StreamReader(pipe2.OutputStream));
var strings1 = Enumerable.Range(0, 2000).Select(_ => Guid.NewGuid().ToString()).ToArray();
var strings2 = Enumerable.Range(0, 2300).Select(_ => Guid.NewGuid().ToString()).ToArray();
void writeStrings(IReadOnlyList <string> strings, Pipe pipe)
{
var spinWait = new SpinWait();
var random = new Random(Guid.NewGuid().GetHashCode());
using (var writer = new StreamWriter(pipe.InputStream))
{
foreach (var line in strings)
{
if (random.Next(4) == 1)
{
spinWait.SpinOnce();
}
writer.WriteLine(line);
}
}
}
var task1 = Task.Run(() => writeStrings(strings1, pipe1));
var task2 = Task.Run(() => writeStrings(strings2, pipe2));
var consumeTask = Task.Run(() => enumerable.ToList());
Task.WaitAll(task1, task2, consumeTask);
CollectionAssert.AreEquivalent(strings1.Concat(strings2).ToList(), consumeTask.Result);
}
public void TestBothAreEmpty()
{
var list = new MergedLinesEnumerable(new StringReader(string.Empty), new StringReader(string.Empty)).ToList();
list.Count.ShouldEqual(0, string.Join(", ", list));
}
