Adds test/terminal/terminal_test.dart — 54 unit tests covering the
`Terminal` class as a pure-Dart orchestrator: construction +
TerminalState defaults, the Observable mixin, write/writeChar,
keyInput / charInput / textInput / paste (with bracketed-paste +
ctrl/alt encodings, including macOS reservation), mouseInput
gating, resize (clamping + onResize callback + alt-buffer
scrollback clear), buffer switching (use{Alt,Main}Buffer +
clearAltBuffer), every SBC handler (bell / backspace / lineFeed /
CR / SO / SI / unknown), tab-stop manipulation (tab jump +
saturation, clearTabStopUnderCursor, clearAllTabStops, setTapStop),
every ANSI escape handler (save/restore cursor, index, nextLine,
reverseIndex, designateCharset), CSI cursor + erase + line/char
insert/delete + scroll + repeatPreviousCharacter (incl. no-op when
no preceding char), device-attribute and status reports, every
mode setter mirroring into its getter, every SGR set/unset attr +
colour setter, OSC handlers (setTitle / setIconName / unknownOSC),
and all the documented no-op fallbacks (unknownSBC, unkownEscape,
unknownCSI, setUnknownMode, setUnknownDecMode, setColumnMode,
unsupportedStyle).
Also fixes a real production bug surfaced while writing tests:
`BufferLine.eraseRange(0, 0, ...)` panicked with a `RangeError`
because the right-side wide-char guard read `_data[-1]` via
`getWidth(end - 1)` when `end == 0`. The left guard already had a
`start > 0` check; the right guard was missing the symmetric
`end > 0`. Real trigger path: `Terminal.eraseDisplayAbove`
(`ESC[1J`) with the cursor at column 0 — common after `ESC[H\x1b[1J`
home-then-erase-above sequences that many TUIs emit on redraw.
Regression test added in line_test.dart.
Coverage delta:
- terminal.dart: 0/283 → 291/291 (file grew by 8 LF for the
fix's comment lines).
- base/observable.dart: 0/7 → 7/7 (covered transitively via
Terminal's listener tests).
- Total project: 56.40% → 59.82%; coverage_floor bumped 56 → 59.
Co-Authored-By: Claude <noreply@anthropic.com>
Adds test/terminal/buffer/line_test.dart — 51 unit tests covering
BufferLine and CellAnchor, hitting every reachable line in
lib/src/terminal/src/core/buffer/line.dart (192 / 192).
Coverage delta:
- line.dart: 0 / 194 → 192 / 192 (file shrank by two lines after
the prior commit's iteration fix folded two for-loop heads into
for-each-toList).
- Total project: 36.39% → 39.12%.
- pubspec.yaml `coverage_floor:` bumped 36 → 39 in lockstep.
Highlights:
- All packed-cell encodings (foreground/background/attrs/content
channels, codepoint+width packing, CellData round-trips).
- `eraseRange` wide-char neighbor extension on both ends.
- `removeCells` / `insertCells` shift logic, anchor reposition, and
the wide-tail-erase branch (insertCells case where the post-shift
last cell carries a wide marker).
- `resize` exercising the [64, 256) capacity-doubling branch and
the >=256 +32 branch separately.
- `getTrimmedLength` cols-clamp behaviour for null/over-capacity.
- `getText` skip-trailing-wide-char branch.
- `CellAnchor` lifecycle: detached construction, `reposition`,
`reparent` (both detached→attached and between owners), `dispose`,
attached y/offset via a real IndexAwareCircularBuffer.
Also cleans up five `unrelated_type_equality_checks` analyze infos
in test/terminal/buffer/range_test.dart by typing the RHS as Object
when intentionally probing the type-mismatch branch of operator==.
Co-Authored-By: Claude <noreply@anthropic.com>
jpmschweitzerandClaude