public void GetNext_Test()
{
var target = new StringCharacterSequence("abc");
target.GetNext().Should().Be('a');
target.GetNext().Should().Be('b');
target.GetNext().Should().Be('c');
target.GetNext().Should().Be('\0');
}
public void GetRemainder_End()
{
var target = new StringCharacterSequence("abc");
target.GetNext();
target.GetNext();
target.GetNext();
target.GetRemainder().Should().Be("");
}
public void GetNext_OldMacNewlines()
{
var target = new StringCharacterSequence("\ra\r");
target.GetNext().Should().Be('\n');
target.GetNext().Should().Be('a');
target.GetNext().Should().Be('\n');
target.GetNext().Should().Be('\0');
}
public void GetNext_UnixNewlines()
{
var target = new StringCharacterSequence("\na\n");
target.GetNext().Should().Be('\n');
target.GetNext().Should().Be('a');
target.GetNext().Should().Be('\n');
target.GetNext().Should().Be('\0');
}
public void GetNext_Empty()
{
var target = new StringCharacterSequence("");
// Every get attempt past the end of the string will return '\0'
target.GetNext().Should().Be('\0');
target.GetNext().Should().Be('\0');
target.GetNext().Should().Be('\0');
target.GetNext().Should().Be('\0');
}
public void IsAtEnd_Test()
{
var target = new StringCharacterSequence("abc");
target.IsAtEnd.Should().BeFalse();
target.GetNext();
target.IsAtEnd.Should().BeFalse();
target.GetNext();
target.IsAtEnd.Should().BeFalse();
target.GetNext();
target.IsAtEnd.Should().BeTrue();
}
public void Peek_WindowsNewlines()
{
var target = new StringCharacterSequence("\r\na\r\n");
target.Peek().Should().Be('\n');
target.GetNext();
target.Peek().Should().Be('a');
target.GetNext();
target.Peek().Should().Be('\n');
target.GetNext();
target.Peek().Should().Be('\0');
}
public void GetNext_OldMacNewlines_NonNormalized()
{
var target = new StringCharacterSequence("\ra\r", new StringCharacterSequence.Options
{
NormalizeLineEndings = false
});
target.GetNext().Should().Be('\r');
target.GetNext().Should().Be('a');
target.GetNext().Should().Be('\r');
target.GetNext().Should().Be('\0');
}
public void GetNext_Empty_CustomEndSentinel()
{
var target = new StringCharacterSequence("", new StringCharacterSequence.Options
{
EndSentinel = 'X'
});
// Every get attempt past the end of the string will return '\0'
target.GetNext().Should().Be('X');
target.GetNext().Should().Be('X');
target.GetNext().Should().Be('X');
target.GetNext().Should().Be('X');
}
public void ReadNewlineIncrementsConsumed()
{
var target = new StringCharacterSequence("\r\n");
var next = target.GetNext();
next.Should().Be('\n');
target.Consumed.Should().Be(1);
}
public void Output_Callback_Throw()
{
var parser = Any().Chain <char, char, object>(c => throw new System.Exception());
var input = new StringCharacterSequence("abc");
Action act = () => parser.Parse(input);
act.Should().Throw <Exception>();
input.GetNext().Should().Be('a');
}
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);
}
public void Location_Test()
{
var target = new StringCharacterSequence("a\nbc");
target.GetNext().Should().Be('a');
target.CurrentLocation.Line.Should().Be(1);
target.CurrentLocation.Column.Should().Be(1);
target.GetNext().Should().Be('\n');
target.GetNext().Should().Be('b');
target.CurrentLocation.Line.Should().Be(2);
target.CurrentLocation.Column.Should().Be(1);
target.GetNext().Should().Be('c');
target.CurrentLocation.Line.Should().Be(2);
target.CurrentLocation.Column.Should().Be(2);
target.GetNext().Should().Be('\0');
}
public void SingleNumber_Remainder()
{
var target = Pratt <string>(c => c
.Add(DigitString())
);
var input = new StringCharacterSequence("1a");
var result = target.Parse(input);
result.Success.Should().BeTrue();
result.Value.Should().Be("1");
result.Consumed.Should().Be(1);
input.GetNext().Should().Be('a');
}
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');
}
