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from textual._parser import Parser
def test_read1():
class TestParser(Parser[str]):
"""A simple parser that reads a byte at a time from a stream."""
def parse(self, on_token):
while True:
data = yield self.read1()
if not data:
break
on_token(data)
test_parser = TestParser()
test_data = "Where there is a Will there is a way!"
for size in range(1, len(test_data) + 1):
# Feed the parser in pieces, first 1 character at a time, then 2, etc
data = []
for offset in range(0, len(test_data), size):
for chunk in test_parser.feed(test_data[offset : offset + size]):
data.append(chunk)
# Check we have received all the data in characters, no matter the fee dsize
assert len(data) == len(test_data)
assert "".join(data) == test_data
def test_read():
class TestParser(Parser[str]):
"""A parser that reads chunks of a given size from the stream."""
def __init__(self, size):
self.size = size
super().__init__()
def parse(self, on_token):
while True:
data = yield self.read1()
if not data:
break
on_token(data)
test_data = "Where there is a Will there is a way!"
for read_size in range(1, len(test_data) + 1):
for size in range(1, len(test_data) + 1):
test_parser = TestParser(read_size)
data = []
for offset in range(0, len(test_data), size):
for chunk in test_parser.feed(test_data[offset : offset + size]):
data.append(chunk)
assert "".join(data) == test_data
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