public async Task TestSupportResetting(IList <Item> expectedTokens)
{
using (var tokenIterator = new AsyncLATokenIterator(expectedTokens.AsAsync()))
{
if (tokenIterator.SupportsResetting)
{
var isEmpty = true;
while (await tokenIterator.MoveNextAsync())
{
isEmpty = false;
}
tokenIterator.Reset();
Assert.That(tokenIterator.MoveNextAsync(), Is.EqualTo(isEmpty), "Has element after resetting is not empty");
}
else
{
Assert.That(tokenIterator.Reset, Throws.InvalidOperationException);
}
}
}
public async Task TestSupportResetting(IList<Token> expectedTokens)
{
using (var tokenIterator = new AsyncLATokenIterator(expectedTokens.AsAsync()))
{
if (tokenIterator.SupportsResetting)
{
var isEmpty = true;
while (await tokenIterator.MoveNextAsync())
{
isEmpty = false;
}
tokenIterator.Reset();
Assert.That(tokenIterator.MoveNextAsync(), Is.EqualTo(isEmpty), "Has element after resetting is not empty");
}
else
{
Assert.That(tokenIterator.Reset, Throws.InvalidOperationException);
}
}
}
public async Task TestTokenIteration(IList<Token> expectedTokens)
{
using (var tokenIterator = new AsyncLATokenIterator(expectedTokens.AsAsync()))
{
for (var i = 0; i < expectedTokens.Count; i++)
{
Assert.That(await tokenIterator.MoveNextAsync(), Is.True, "Move next i={0}", i);
var current = await tokenIterator.CurrentAsync();
Assert.That(current, Is.EqualTo(expectedTokens[i]), "Current i={0} expected={1} is={2}",
i, expectedTokens[i], current);
var la = await tokenIterator.LookAheadAsync();
var expectedLA = i + 1 < expectedTokens.Count ? expectedTokens[i + 1] : Token.EOF;
Assert.That(la, Is.EqualTo(expectedLA), "Lookahead i={0} expected={1} is={2}",
i, expectedLA, la);
}
}
}
public async Task TestTokenIteration(IList <Item> expectedTokens)
{
using (var tokenIterator = new AsyncLATokenIterator(expectedTokens.AsAsync()))
{
for (var i = 0; i < expectedTokens.Count; i++)
{
Assert.That(await tokenIterator.MoveNextAsync(), Is.True, "Move next i={0}", i);
var current = await tokenIterator.CurrentAsync();
Assert.That(current, Is.EqualTo(expectedTokens[i]), "Current i={0} expected={1} is={2}",
i, expectedTokens[i], current);
var la = await tokenIterator.LookAheadAsync();
var expectedLA = i + 1 < expectedTokens.Count ? expectedTokens[i + 1] : Item.EOF;
Assert.That(la, Is.EqualTo(expectedLA), "Lookahead i={0} expected={1} is={2}",
i, expectedLA, la);
}
}
}
