public void ThrowsIfConsumeIsLessThanZero()
{
var output = new ConsumableArrayBufferWriter();
WriteData(output, 1);
Assert.Throws <ArgumentException>(() => output.Consume(-1));
}
public void ThrowsIfConsumePlusConsumedWouldOverflow()
{
var output = new ConsumableArrayBufferWriter(256);
WriteData(output, 100);
output.Consume(50);
Assert.Throws <InvalidOperationException>(() => output.Consume(int.MaxValue));
}
public void ConsumeReducesUnconsumedWrittenCount()
{
var output = new ConsumableArrayBufferWriter();
WriteData(output, 2);
Assert.Equal(2, output.UnconsumedWrittenCount);
output.Consume(1);
Assert.Equal(1, output.UnconsumedWrittenCount);
}
public void ThrowsIfTotalConsumedIsGreaterThanWritten()
{
var output = new ConsumableArrayBufferWriter();
Assert.Throws <InvalidOperationException>(() => output.Consume(1));
WriteData(output, 2);
output.Consume(1);
output.Consume(1);
Assert.Throws <InvalidOperationException>(() => output.Consume(1));
WriteData(output, 2);
Assert.Throws <InvalidOperationException>(() => output.Consume(3));
}
public void IfConsumedEqualsWrittenFreeCapacityIsReset()
{
var output = new ConsumableArrayBufferWriter <T>(256);
Assert.Equal(256, output.FreeCapacity);
WriteData(output, 128);
Assert.Equal(128, output.FreeCapacity);
output.Consume(64);
Assert.Equal(128, output.FreeCapacity);
output.Consume(64);
Assert.Equal(256, output.FreeCapacity);
}
public void IfConsumedEqualsWritten_AndCapacityIsLarge_BackingArrayIsReturned()
{
var output = new ConsumableArrayBufferWriter(512);
var capacity = output.Capacity;
Assert.InRange(capacity, 512, int.MaxValue);
Assert.Equal(capacity, output.FreeCapacity);
WriteData(output, 128);
Assert.Equal(capacity - 128, output.FreeCapacity);
output.Consume(64);
Assert.Equal(capacity - 128, output.FreeCapacity);
output.Consume(64);
Assert.Equal(0, output.Capacity);
Assert.Equal(0, output.FreeCapacity);
}
public void ConsumeIsNotIncludedInWrittenSpanOrMemory()
{
var output = new ConsumableArrayBufferWriter();
WriteData(output, 2);
var oldSpan = output.WrittenSpan;
var oldMemory = output.WrittenMemory;
Assert.Equal(2, oldSpan.Length);
Assert.Equal(2, oldMemory.Length);
output.Consume(1);
var newSpan = output.WrittenSpan;
var newMemory = output.WrittenMemory;
Assert.Equal(1, newSpan.Length);
Assert.Equal(1, newMemory.Length);
Assert.True(oldSpan[1..].SequenceEqual(newSpan));
public void IfConsumedEqualsWritten_AndCapacityIsSmall_FreeCapacityIsReset()
{
ConsumableArrayBufferWriter output;
do
{
output = new ConsumableArrayBufferWriter(256);
}while (output.Capacity >= 512);
var capacity = output.Capacity;
Assert.InRange(capacity, 256, 512);
Assert.Equal(capacity, output.FreeCapacity);
WriteData(output, 128);
Assert.Equal(capacity - 128, output.FreeCapacity);
output.Consume(64);
Assert.Equal(capacity - 128, output.FreeCapacity);
output.Consume(64);
Assert.Equal(capacity, output.FreeCapacity);
}
