closed TG-1; git was inited;

tests/test_nmea_utils.py

@@ -0,0 +1,65 @@
+from ais_hub.parser.nmea_utils import (
+    classify_kind,
+    compute_checksum,
+    parse_sentence,
+    split_lines,
+    strip_eol,
+)
+
+
+def test_checksum_roundtrip():
+    body = "AIVDM,1,1,,A,15M67FC000G?ufbE`FepT@3n00Sa,0"
+    cs = compute_checksum(body)
+    line = f"!{body}*{cs:02X}"
+    s = parse_sentence(line)
+    assert s is not None
+    assert s.checksum_ok is True
+
+
+def test_parse_sentence_ais_ok():
+    body = "AIVDM,1,1,,A,15M67FC000G?ufbE`FepT@3n00Sa,0"
+    line = f"!{body}*{compute_checksum(body):02X}"
+    s = parse_sentence(line)
+    assert s is not None
+    assert s.start == "!"
+    assert s.talker == "AIVDM"
+    assert s.checksum_ok is True
+    assert s.fields[0] == "1"
+    assert s.fields[3] == "A"
+
+
+def test_parse_sentence_bad_checksum():
+    s = parse_sentence("!AIVDM,1,1,,A,15M67FC000G?ufbE`FepT@3n00Sa,0*00")
+    assert s is not None
+    assert s.checksum_ok is False
+
+
+def test_parse_sentence_empty_and_garbage():
+    assert parse_sentence("") is None
+    assert parse_sentence("   ") is None
+    assert parse_sentence("no-start-char") is None
+    assert parse_sentence("!") is None
+
+
+def test_split_lines_mixed_eols():
+    chunk = b"!AIVDM,1,1,,A,x,0*2E\r\n$GPGGA,,,,,,0,,,,,,,,*56\n!BAD\r"
+    lines = split_lines(chunk)
+    assert len(lines) == 3
+    assert lines[0].startswith("!AIVDM")
+    assert lines[1].startswith("$GPGGA")
+    assert lines[2].startswith("!BAD")
+
+
+def test_strip_eol():
+    assert strip_eol("abc\r\n") == "abc"
+    assert strip_eol("abc\n") == "abc"
+    assert strip_eol("abc") == "abc"
+
+
+def test_classify_kind():
+    assert classify_kind("AIVDM", "!") == "ais"
+    assert classify_kind("AIVDO", "!") == "ais"
+    assert classify_kind("BSVDM", "!") == "ais"
+    assert classify_kind("GPRMC", "$") == "gps"
+    assert classify_kind("GNGGA", "$") == "gps"
+    assert classify_kind("UNKNOWN", "$") == "other"