test(iecpoc): add plain-mode tests for TraceFormatter

Covers the plain property, per-record-type output (printable chars,
CR/LF newlines, LISTEN/UNLISTEN dividers, silenced events and other
commands), and a full-session integration check.

Generated by Clanker

tests/test_device.py

@@ -16,7 +16,11 @@ from . import fixtures
 
 
 def _trace(records, my_address=4, raw=False):
-    return list(TraceFormatter(my_address=my_address, raw=raw).format_stream(records))
+    return list(TraceFormatter(my_address=my_address, raw=raw, debug=True).format_stream(records))
+
+
+def _plain(records, my_address=4):
+    return list(TraceFormatter(my_address=my_address).format_stream(records))
 
 
 # --- wire-format round trip -------------------------------------------------
@@ -101,3 +105,90 @@ def test_raw_mode_is_hex_only():
     assert trace[0] == "24"
     # data bytes present as hex
     assert "48" in trace  # 'H'
+
+
+# --- plain mode -------------------------------------------------------------
+def _make_record(kind, value, flags=0):
+    from iecpoc.device import IecRecord
+    return IecRecord(kind, value, flags, 0)
+
+
+def test_plain_property():
+    assert TraceFormatter(debug=False).plain is True
+    assert TraceFormatter(debug=True).plain is False
+    assert TraceFormatter(raw=True).plain is False
+
+
+def test_plain_listen_divider():
+    rec = _make_record(device.KIND_COMMAND, 0x24, device.FLAG_ADDRESSED)  # LISTEN 4
+    out = _plain([rec])
+    assert len(out) == 1
+    assert "LISTEN 4" in out[0]
+
+
+def test_plain_unlisten_divider():
+    rec = _make_record(device.KIND_COMMAND, 0x3F)  # UNLISTEN
+    out = _plain([rec])
+    assert len(out) == 1
+    assert "UNLISTEN" in out[0]
+
+
+def test_plain_data_printable():
+    rec = _make_record(device.KIND_DATA, 0x48, device.FLAG_ADDRESSED)  # 'H'
+    assert _plain([rec]) == ["H"]
+
+
+def test_plain_data_cr_yields_newline():
+    rec = _make_record(device.KIND_DATA, 0x0D, device.FLAG_ADDRESSED)
+    assert _plain([rec]) == ["\n"]
+
+
+def test_plain_data_lf_yields_newline():
+    rec = _make_record(device.KIND_DATA, 0x0A, device.FLAG_ADDRESSED)
+    assert _plain([rec]) == ["\n"]
+
+
+def test_plain_data_shift_cr_yields_newline():
+    rec = _make_record(device.KIND_DATA, 0x8D, device.FLAG_ADDRESSED)
+    assert _plain([rec]) == ["\n"]
+
+
+def test_plain_events_are_silent():
+    recs = [
+        _make_record(device.KIND_EVENT, device.EV_IDLE),
+        _make_record(device.KIND_EVENT, device.EV_ATN_ASSERTED),
+        _make_record(device.KIND_EVENT, device.EV_ATN_RELEASED),
+    ]
+    assert _plain(recs) == []
+
+
+def test_plain_non_listen_commands_silent():
+    recs = [
+        _make_record(device.KIND_COMMAND, 0xF0),  # OPEN SA=0
+        _make_record(device.KIND_COMMAND, 0xE0),  # CLOSE SA=0
+        _make_record(device.KIND_COMMAND, 0x60),  # SECOND/DATA SA=0
+        _make_record(device.KIND_COMMAND, 0x48),  # TALK 8
+        _make_record(device.KIND_COMMAND, 0x5F),  # UNTALK
+    ]
+    assert _plain(recs) == []
+
+
+def test_plain_graphic_bytes_silent():
+    rec = _make_record(device.KIND_DATA, 0x70, device.FLAG_ADDRESSED)  # graphic range
+    assert _plain([rec]) == []
+
+
+def test_plain_control_bytes_silent():
+    rec = _make_record(device.KIND_DATA, 0x12, device.FLAG_ADDRESSED)  # RVS-ON
+    assert _plain([rec]) == []
+
+
+def test_plain_full_session():
+    out = _plain(fixtures.build_session())
+    joined = "".join(out)
+    assert "HELLO WORLD" in joined
+    assert "LINE TWO" in joined
+    assert "LISTEN 4" in joined
+    assert "UNLISTEN" in joined
+    # each PRINT# record ends with CR → two newlines from data, plus divider newlines
+    assert joined.count("\n") >= 2