Renamed to lorabot

tests/test_messages.py

@@ -1,4 +1,4 @@
-from meshbot.messages import trim_to_bytes
+from lorabot.messages import split_to_bytes, trim_to_bytes
 
 
 def test_short_ascii_passthrough():
@@ -38,3 +38,61 @@ def test_zero_or_negative_max_bytes():
 
 def test_empty_input():
     assert trim_to_bytes("", 184) == ""
+
+
+# split_to_bytes
+
+
+def test_split_short_input_single_chunk():
+    assert split_to_bytes("hello", 184) == ["hello"]
+
+
+def test_split_long_input_two_chunks_drops_rest():
+    s = "x" * 500
+    chunks = split_to_bytes(s, 180, max_chunks=2)
+    assert chunks == ["x" * 180, "x" * 180]
+    assert sum(len(c.encode("utf-8")) for c in chunks) == 360
+
+
+def test_split_exact_two_chunks_no_third():
+    s = "x" * 360
+    chunks = split_to_bytes(s, 180, max_chunks=2)
+    assert chunks == ["x" * 180, "x" * 180]
+
+
+def test_split_does_not_break_multibyte():
+    # 4 emoji × 4 bytes = 16 bytes total. Budget 5 bytes/chunk → 1 emoji per chunk.
+    chunks = split_to_bytes("🎉🎉🎉🎉", 5, max_chunks=2)
+    assert chunks == ["🎉", "🎉"]
+    for c in chunks:
+        assert len(c.encode("utf-8")) == 4
+
+
+def test_split_two_byte_char_at_boundary():
+    # "abäcd" → bytes: a b ä(2) c d  = 6 bytes. Budget 3/chunk:
+    # chunk1 must end at "ab" (3rd byte is start of ä, can't include without continuation).
+    # chunk2: "äc"  = 3 bytes.
+    chunks = split_to_bytes("abäcd", 3, max_chunks=2)
+    assert chunks[0] == "ab"
+    assert chunks[1] == "äc"
+    # "d" is dropped (over the budget).
+
+
+def test_split_empty_input():
+    assert split_to_bytes("", 184) == []
+
+
+def test_split_zero_max_bytes():
+    assert split_to_bytes("hi", 0) == []
+
+
+def test_split_zero_chunks():
+    assert split_to_bytes("hi", 184, max_chunks=0) == []
+
+
+def test_split_concat_is_prefix_of_input():
+    # The delivered text must always be a prefix of the original (no rearrangement).
+    src = "Hello world! 🎉 This is a longer message that should be split."
+    chunks = split_to_bytes(src, 20, max_chunks=2)
+    delivered = "".join(chunks)
+    assert src.startswith(delivered)