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dreader-application/tests/test_backward_nav_minimal.py
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dtourolleandClaude Opus 5 f7d59d025f chore: tidy repository layout and consolidate hardware docs
Root had grown to 30 entries, most of it generated output and one-off
scripts. It now holds 12.

Docs:
- Merge HARDWARE_SETUP, HARDWARE_PINOUT, GPIO_BUTTONS and
  ACCELEROMETER_PAGE_FLIP into a single docs/HARDWARE.md
- Move ARCHITECTURE, REQUIREMENTS and HAL_IMPLEMENTATION_SPEC to docs/,
  leaving only README.md in the root
- Update cross-references in README, setup_rpi.py and
  install_hardware_drivers.sh, and re-base ARCHITECTURE's source links

Merging surfaced three errors, reconciled against hardware_config.json:
- The power button was documented as GPIO 21 to GND with a pull-up. It is
  active high (pull_up: false); wiring it as documented reads as
  permanently pressed.
- GPIO_BUTTONS used GPIO 23 for next-page; it is GPIO 27.
- The FT5316 INT pin was routed to GPIO 27, which collides with the
  next-page button. Now documented as a conflict.

Scripts:
- Move debug_overlay_links.py and debug_previous_page.py to scripts/debug/
- Rename test_pagination_visual.py to scripts/debug/visualize_pagination.py;
  it renders output and asserts nothing, so the test_ prefix was misleading
- Fix the __file__-relative paths these three relied on
- Track update_pyweblayout.sh under scripts/

Tests:
- Reword the backward-navigation tests, which described a pyWebLayout bug
  that is now fixed, as regression tests

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-08 22:27:53 +02:00

82 lines
2.5 KiB
Python

"""
Regression test for backward navigation onto the cover page.
Going forward off the cover and then back again must return to block_index=0.
Previously it left current_position at the first content block (1) while flagging
the cover as displayed, so the cover had two different internal representations.
Since current_position is what gets persisted, saving while on the cover reopened
the book past it. Fixed in pyWebLayout's EreaderLayoutManager.previous_page().
"""
import unittest
import tempfile
import shutil
from pathlib import Path
from dreader.application import EbookReader
class TestBackwardNavigationBug(unittest.TestCase):
"""Minimal reproduction of backward navigation bug"""
def setUp(self):
"""Set up test environment"""
self.temp_dir = tempfile.mkdtemp()
self.epub_path = "tests/data/test.epub"
if not Path(self.epub_path).exists():
self.skipTest(f"Test EPUB not found at {self.epub_path}")
def tearDown(self):
"""Clean up test environment"""
shutil.rmtree(self.temp_dir, ignore_errors=True)
def test_minimal_backward_navigation_bug(self):
"""
MINIMAL CASE:
1. Start at block_index=0
2. Go forward once (to block_index=1)
3. Go backward once
4. Should land back at block_index=0
"""
reader = EbookReader(
page_size=(800, 1000),
bookmarks_dir=self.temp_dir,
buffer_size=0
)
reader.load_epub(self.epub_path)
# Starting position
pos_start = reader.manager.current_position.copy()
print(f"\n1. Starting at block_index={pos_start.block_index}")
self.assertEqual(pos_start.block_index, 0, "Should start at block 0")
# Go forward
reader.next_page()
pos_forward = reader.manager.current_position.copy()
print(f"2. After next_page(): block_index={pos_forward.block_index}")
self.assertEqual(pos_forward.block_index, 1, "Should be at block 1")
# Go backward
reader.previous_page()
pos_final = reader.manager.current_position.copy()
print(f"3. After previous_page(): block_index={pos_final.block_index}")
print(f"\nEXPECTED: block_index=0")
print(f"ACTUAL: block_index={pos_final.block_index}")
self.assertEqual(
pos_final.block_index,
0,
"Backward navigation from block 1 should return to block 0"
)
reader.close()
if __name__ == '__main__':
unittest.main()