public void Method_Parse_MultiOutput()
{
var parser = Cache(ProduceMulti(() => new[] { "abc" }));
var input = new StringCharacterSequence("TEST");
var start = input.Checkpoint();
var cache = new MemoryCacheResultsCache();
var state = new ParseState <char>(input, _ => { }, cache);
// First attempt, we parse the string for the first time. There's nothing in cache
var result = parser.Parse(state);
result.Success.Should().BeTrue();
result.Results[0].Value.Should().Be("abc");
var stats = cache.GetStatistics();
stats.Attempts.Should().Be(1);
stats.Misses.Should().Be(1);
stats.Hits.Should().Be(0);
// Second attempt, we start from the beginning again, but now the value is in cache
// already. We keep the same statistics from last time (1 attempt, 1 miss) and append
// the new hit
start.Rewind();
result = parser.Parse(state);
result.Success.Should().BeTrue();
result.Results[0].Value.Should().Be("abc");
stats = cache.GetStatistics();
stats.Attempts.Should().Be(2);
stats.Misses.Should().Be(1);
stats.Hits.Should().Be(1);
}
public void Checkpoint_Test()
{
var target = new StringCharacterSequence("abc");
var cp = target.Checkpoint();
target.GetNext().Should().Be('a');
target.GetNext().Should().Be('b');
target.GetNext().Should().Be('c');
target.GetNext().Should().Be('\0');
cp.Rewind();
target.GetNext().Should().Be('a');
target.GetNext().Should().Be('b');
target.GetNext().Should().Be('c');
target.GetNext().Should().Be('\0');
}
public void Location_Rewind()
{
var target = new StringCharacterSequence("abc\nde");
target.GetNext();
target.GetNext();
target.GetNext();
target.CurrentLocation.Line.Should().Be(1);
target.CurrentLocation.Column.Should().Be(3);
var checkpoint = target.Checkpoint();
target.GetNext().Should().Be('\n');
target.CurrentLocation.Line.Should().Be(2);
target.CurrentLocation.Column.Should().Be(0);
checkpoint.Rewind();
target.CurrentLocation.Line.Should().Be(1);
target.CurrentLocation.Column.Should().Be(3);
}