public async Task ReadWriteTest <T>(object?__ = null) where T : unmanaged, IComparable <T>, IEquatable <T>
{
const int n = 248;
const int m = 496;
var converter = ConverterProvider.GetImageConverter <T>();
var data = ArrayPool <T> .Shared.Rent(n *m);
try
{
for (var i = 0; i < n * m; i++)
{
data[i] = Internal.UnsafeNumerics.MathOps.DangerousCast <double, T>(_r.NextDouble() * i);
}
var src = Image.Create <T>(data.AsSpan(0, n * m), n, m);
await using var fs = new FileStream($"multiple_records_{typeof(T).Name}.fits", FileMode.Create, FileAccess.ReadWrite);
await using (var writer = new FitsWriter(fs))
{
await converter.WriteToFitsAsync(src, writer);
await converter.WriteToFitsAsync(src, writer, true);
}
fs.Seek(0, SeekOrigin.Begin);
var images = new List <IImage <T> >(2);
await using (var reader = new FitsReader(fs))
{
await foreach (var block in reader.EnumerateBlocksAsync())
{
images.Add(converter.ConvertFromBlock(block, out _));
}
}
Assert.That(images, Has.Count.EqualTo(2));
Assert.AreEqual(src, images[0]);
Assert.AreEqual(src, images[1]);
}
finally
{
ArrayPool <T> .Shared.Return(data);
}
}
public void TestThroughBlocks <T>(object?__ = null) where T : unmanaged, IComparable <T>, IEquatable <T>
{
const int n = 248;
const int m = 496;
var data = ArrayPool <T> .Shared.Rent(n *m);
var converter = ConverterProvider.GetImageConverter <T>();
try
{
for (var i = 0; i < n; i++)
{
for (var j = 0; j < m; j++)
{
data[m * i + j] = Internal.UnsafeNumerics.MathOps.DangerousCast <double, T>(Math.Sqrt(
(i - 50) * (i - 50) * (1 + Math.Pow(Math.Sin(Math.PI * (i + 23) * 10 / n), 2))
+ (j / 2.0 - 100) * (j / 2.0 - 100) * (1.1 + Math.Sin(Math.PI * j * 10 / m))));
}
}
data[247 * 496 + 495] = default;
var src = Image.Create <T>(data.AsSpan(..(n * m)), n, m);
var key = FitsKey.Create("DEBUG", "Debug key", "With a comment");
var block = converter.ConvertToBlock(src, key);
var rec = converter.ConvertFromBlock(block, out var keys);
Assert.AreEqual(src, rec);
Assert.AreEqual(data[247 * 496 + 495], src[247, 495]);
Assert.AreEqual(data[247 * 496 + 495], rec[247, 495]);
Assert.That(keys, Has.One.Items);
Assert.That(keys, Contains.Item(key));
}
finally
{
ArrayPool <T> .Shared.Return(data);
}
}