public void TestVLQUInt64()
{
var rnd = new Random();
for (var c = 0; c < count; c++)
{
var memSize = rnd.Next(1, 10_000);
var mem = new byte[memSize + sizeof(UInt64) + 2];
var answer = rnd.NextUInt64();
var span1 = new Span <byte>(mem);
var span2 = new ReadOnlySpan <byte>(mem);
span1.WriteVLQ(answer, out var len);
var back = span2.ReadVLQUInt64(out var len2);
Assert.Equal(SpanUtils.MeasureVLQ(answer), len);
Assert.Equal(SpanUtils.MeasureVLQ(answer), len2);
Assert.Equal(answer, back);
// Check overflow
span1.Fill(0xFF);
Assert.Throws <OverflowException>(() =>
{
var span3 = new ReadOnlySpan <byte>(mem);
span3.ReadVLQUInt64(out _);
});
}
}
public void TestVLQUInt16FullRange()
{
var rnd = new Random();
var mem = new byte[sizeof(UInt16) + 1];
for (int c = UInt16.MinValue; c < UInt16.MaxValue; c++)
{
var answer = (UInt16)c;
var span1 = new Span <byte>(mem);
var span2 = new ReadOnlySpan <byte>(mem);
span1.Fill(0);
span1.WriteVLQ(answer, out var len);
var back = span2.ReadVLQUInt16(out var len2);
Assert.Equal(answer, back);
Assert.Equal(SpanUtils.MeasureVLQ(answer), len);
Assert.Equal(SpanUtils.MeasureVLQ(answer), len2);
}
}
public void TestVLQInt32()
{
var rnd = new Random();
for (var c = 0; c < count; c++)
{
var memSize = rnd.Next(1, 10_000);
var mem = new byte[memSize * SpanUtils.MeasureVLQ(UInt32.MaxValue) + 1];
var span1 = new SpanStream(mem);
var span2 = new SpanStream(mem);
var data = new Int32[memSize];
for (var i = 0; i < memSize; i++)
{
data[i] = rnd.NextInt32();
}
for (var i = 0; i < memSize; i++)
{
span1.WriteVLQ(data[i]);
}
for (var i = 0; i < memSize; i++)
{
Assert.Equal(data[i], span2.ReadVLQInt32(out var len));
Assert.Equal(SpanUtils.MeasureVLQ(data[i]), len);
}
// Check overflow
new Span <byte>(mem).Fill(0xFF);
Assert.Throws <OverflowException>(() =>
{
var span3 = new SpanStream(mem);
span3.ReadVLQInt32(out _);
});
}
}
