From 8763bc0e38fce37fcb6e617c3ed4a2afa6a62762 Mon Sep 17 00:00:00 2001
From: denpamusic <denpa@denpa.pro>
Date: Fri, 20 Oct 2023 13:02:13 +0300
Subject: [PATCH] Use correct terminology.

Rename crc to bcc in util.
---
 pyplumio/frames/__init__.py | 2 +-
 pyplumio/stream.py          | 2 +-
 pyplumio/util.py            | 4 ++--
 tests/test_stream.py        | 2 +-
 tests/test_util.py          | 4 ++--
 5 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/pyplumio/frames/__init__.py b/pyplumio/frames/__init__.py
index c3c97aaa..7c6117a3 100644
--- a/pyplumio/frames/__init__.py
+++ b/pyplumio/frames/__init__.py
@@ -153,7 +153,7 @@ def bytes(self) -> bytes:
         data = self.header
         data.append(self.frame_type)
         data += self.message
-        data.append(util.crc(data))
+        data.append(util.bcc(data))
         data.append(FRAME_END)
         return bytes(data)
 
diff --git a/pyplumio/stream.py b/pyplumio/stream.py
index 20db5ddc..debe3d6e 100644
--- a/pyplumio/stream.py
+++ b/pyplumio/stream.py
@@ -119,7 +119,7 @@ async def read(self) -> Frame | None:
                 + f"'{length - HEADER_SIZE}' bytes"
             ) from e
 
-        if payload[-2] != util.crc(header + payload[:-2]):
+        if payload[-2] != util.bcc(header + payload[:-2]):
             raise ChecksumError(f"Incorrect frame checksum ({payload[-2]})")
 
         frame = factory(
diff --git a/pyplumio/util.py b/pyplumio/util.py
index 8b626bbf..1db0f258 100644
--- a/pyplumio/util.py
+++ b/pyplumio/util.py
@@ -28,8 +28,8 @@ def unpack_string(data: bytearray, offset: int = 0) -> str:
 unpack_header = struct.Struct("<BH4B").unpack_from
 
 
-def crc(data: bytes) -> int:
-    """Return a checksum."""
+def bcc(data: bytes) -> int:
+    """Return a block check character."""
     return functools.reduce(lambda x, y: x ^ y, data)
 
 
diff --git a/tests/test_stream.py b/tests/test_stream.py
index 3ff74371..d6f98e4e 100644
--- a/tests/test_stream.py
+++ b/tests/test_stream.py
@@ -135,7 +135,7 @@ async def test_frame_reader_with_incomplete_read(
     return_value=b"\x31\xfe\x00\xc9\x16",
     new_callable=AsyncMock,
 )
-async def test_frame_reader_with_incorrect_crc(
+async def test_frame_reader_with_incorrect_bcc(
     mock_readexactly, mock_read, frame_reader: FrameReader
 ) -> None:
     """Test reader on frame with incorrect checksum."""
diff --git a/tests/test_util.py b/tests/test_util.py
index 1e11a0f8..8209053b 100644
--- a/tests/test_util.py
+++ b/tests/test_util.py
@@ -3,9 +3,9 @@
 from pyplumio import util
 
 
-def test_crc() -> None:
+def test_bcc() -> None:
     """Test CRC checksum calculation."""
-    assert util.crc(b"\x68\x0a\x00\x00\x56\x30\x05\x40") == 0x41
+    assert util.bcc(b"\x68\x0a\x00\x00\x56\x30\x05\x40") == 0x41
 
 
 def test_to_camelcase() -> None: