public void TestSeekOnANTLRInputStream()
{
Encoding encoding = Encoding.Unicode;
byte[] buffer = encoding.GetBytes("One\r\nTwo\r\nThree");
MemoryStream grammarStream = new MemoryStream(buffer);
ANTLRInputStream stream = new ANTLRInputStream(grammarStream, encoding);
Assert.AreEqual('O', stream.LA(1));
Assert.AreEqual(0, stream.Index);
Assert.AreEqual(0, stream.CharPositionInLine);
Assert.AreEqual(1, stream.Line);
stream.Seek(6);
Assert.AreEqual('w', stream.LA(1));
Assert.AreEqual(6, stream.Index);
Assert.AreEqual(1, stream.CharPositionInLine);
Assert.AreEqual(2, stream.Line);
stream.Seek(11);
Assert.AreEqual('h', stream.LA(1));
Assert.AreEqual(11, stream.Index);
Assert.AreEqual(1, stream.CharPositionInLine);
Assert.AreEqual(3, stream.Line);
// seeking backwards leaves state info (other than index in stream) unchanged
stream.Seek(1);
Assert.AreEqual('n', stream.LA(1));
Assert.AreEqual(1, stream.Index);
Assert.AreEqual(1, stream.CharPositionInLine);
Assert.AreEqual(3, stream.Line);
}
public void TestResetOnANTLRInputStream()
{
Encoding encoding = Encoding.Unicode;
byte[] buffer = encoding.GetBytes("One\r\nTwo");
MemoryStream grammarStream = new MemoryStream(buffer);
ANTLRInputStream inputStream = new ANTLRInputStream(grammarStream, encoding);
Assert.AreEqual(0, inputStream.Index);
Assert.AreEqual(0, inputStream.CharPositionInLine);
Assert.AreEqual(1, inputStream.Line);
inputStream.Consume(); // O
inputStream.Consume(); // n
Assert.AreEqual('e', inputStream.LA(1));
Assert.AreEqual(2, inputStream.Index);
inputStream.Reset();
Assert.AreEqual('O', inputStream.LA(1));
Assert.AreEqual(0, inputStream.Index);
Assert.AreEqual(0, inputStream.CharPositionInLine);
Assert.AreEqual(1, inputStream.Line);
inputStream.Consume(); // O
Assert.AreEqual('n', inputStream.LA(1));
Assert.AreEqual(1, inputStream.Index);
Assert.AreEqual(1, inputStream.CharPositionInLine);
Assert.AreEqual(1, inputStream.Line);
inputStream.Consume(); // n
Assert.AreEqual('e', inputStream.LA(1));
Assert.AreEqual(2, inputStream.Index);
Assert.AreEqual(2, inputStream.CharPositionInLine);
Assert.AreEqual(1, inputStream.Line);
inputStream.Consume(); // e
}
public void TestConsumeAllCharactersInAnANTLRInputStream()
{
Encoding encoding = Encoding.Unicode;
byte[] grammarStrBuffer = encoding.GetBytes(grammarStr);
MemoryStream grammarStream = new MemoryStream(grammarStrBuffer);
ANTLRInputStream inputStream = new ANTLRInputStream(grammarStream, Encoding.Unicode);
while (inputStream.Index < inputStream.Count)
{
Console.Out.Write((char)inputStream.LA(1));
inputStream.Consume();
}
Assert.AreEqual(inputStream.Index, inputStream.Count);
}
public void TestSeekOnANTLRInputStream()
{
Encoding encoding = Encoding.Unicode;
byte[] buffer = encoding.GetBytes("One\r\nTwo\r\nThree");
MemoryStream grammarStream = new MemoryStream(buffer);
ANTLRInputStream stream = new ANTLRInputStream(grammarStream, encoding);
Assert.AreEqual('O', stream.LA(1));
Assert.AreEqual(0, stream.Index());
Assert.AreEqual(0, stream.CharPositionInLine);
Assert.AreEqual(1, stream.Line);
stream.Seek(6);
Assert.AreEqual('w', stream.LA(1));
Assert.AreEqual(6, stream.Index());
Assert.AreEqual(1, stream.CharPositionInLine);
Assert.AreEqual(2, stream.Line);
stream.Seek(11);
Assert.AreEqual('h', stream.LA(1));
Assert.AreEqual(11, stream.Index());
Assert.AreEqual(1, stream.CharPositionInLine);
Assert.AreEqual(3, stream.Line);
// seeking backwards leaves state info (other than index in stream) unchanged
stream.Seek(1);
Assert.AreEqual('n', stream.LA(1));
Assert.AreEqual(1, stream.Index());
Assert.AreEqual(1, stream.CharPositionInLine);
Assert.AreEqual(3, stream.Line);
}
public void TestResetOnANTLRInputStream()
{
Encoding encoding = Encoding.Unicode;
byte[] buffer = encoding.GetBytes("One\r\nTwo");
MemoryStream grammarStream = new MemoryStream(buffer);
ANTLRInputStream inputStream = new ANTLRInputStream(grammarStream, encoding);
Assert.AreEqual(0, inputStream.Index());
Assert.AreEqual(0, inputStream.CharPositionInLine);
Assert.AreEqual(1, inputStream.Line);
inputStream.Consume(); // O
inputStream.Consume(); // n
Assert.AreEqual('e', inputStream.LA(1));
Assert.AreEqual(2, inputStream.Index());
inputStream.Reset();
Assert.AreEqual('O', inputStream.LA(1));
Assert.AreEqual(0, inputStream.Index());
Assert.AreEqual(0, inputStream.CharPositionInLine);
Assert.AreEqual(1, inputStream.Line);
inputStream.Consume(); // O
Assert.AreEqual('n', inputStream.LA(1));
Assert.AreEqual(1, inputStream.Index());
Assert.AreEqual(1, inputStream.CharPositionInLine);
Assert.AreEqual(1, inputStream.Line);
inputStream.Consume(); // n
Assert.AreEqual('e', inputStream.LA(1));
Assert.AreEqual(2, inputStream.Index());
Assert.AreEqual(2, inputStream.CharPositionInLine);
Assert.AreEqual(1, inputStream.Line);
inputStream.Consume(); // e
}
public void TestConsumeAllCharactersInAnANTLRInputStream()
{
Encoding encoding = Encoding.Unicode;
byte[] grammarStrBuffer = encoding.GetBytes(grammarStr);
MemoryStream grammarStream = new MemoryStream(grammarStrBuffer);
ANTLRInputStream inputStream = new ANTLRInputStream(grammarStream, Encoding.Unicode);
while (inputStream.Index() < inputStream.Size())
{
Console.Out.Write((char)inputStream.LA(1));
inputStream.Consume();
}
Assert.AreEqual(inputStream.Index(), inputStream.Size());
}
