mirror of
https://github.com/ChuckBuilds/LEDMatrix.git
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ChuckandClaude Opus 5.5
ed0753c1ca
Six small savings with no behaviour change: the odds fetch no longer pretty-prints every response for a debug line; the scroll integer-slice path drops a redundant full-frame np.ascontiguousarray; ledmatrix-web.service gets MALLOC_ARENA_MAX=2 like the display unit; core ESPN responses are parsed via response_json (orjson when installed); and the scroll frame stats go to INFO only for degraded windows plus a 5-minute heartbeat. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
566 lines
22 KiB
Python
566 lines
22 KiB
Python
"""
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Tests for src/common/scroll_helper.py
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Covers ScrollHelper: create_scrolling_image, update_scroll_position,
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get_visible_portion, calculate_dynamic_duration, set_* methods,
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reset_scroll, clear_cache, get_scroll_info.
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"""
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import numpy as np
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import pytest
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import time
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from unittest.mock import patch
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from PIL import Image
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from src.common.scroll_helper import (
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ScrollHelper,
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format_frame_stats,
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frame_stats,
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)
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DISPLAY_W = 64
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DISPLAY_H = 32
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@pytest.fixture
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def helper():
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return ScrollHelper(display_width=DISPLAY_W, display_height=DISPLAY_H)
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def _make_image(width: int = 64, height: int = 32, color=(255, 0, 0)) -> Image.Image:
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img = Image.new("RGB", (width, height), color)
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return img
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# ---------------------------------------------------------------------------
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# __init__ / initial state
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# ---------------------------------------------------------------------------
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class TestScrollHelperInit:
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def test_initial_scroll_position(self, helper):
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assert helper.scroll_position == 0.0
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def test_initial_scroll_complete_false(self, helper):
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assert helper.scroll_complete is False
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def test_display_dimensions(self, helper):
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assert helper.display_width == DISPLAY_W
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assert helper.display_height == DISPLAY_H
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# ---------------------------------------------------------------------------
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# create_scrolling_image
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# ---------------------------------------------------------------------------
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class TestCreateScrollingImage:
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def test_empty_content_returns_blank_image(self, helper):
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result = helper.create_scrolling_image([])
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assert isinstance(result, Image.Image)
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assert helper.total_scroll_width == 0
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def test_single_item_creates_image(self, helper):
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img = _make_image(width=100)
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result = helper.create_scrolling_image([img])
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assert isinstance(result, Image.Image)
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assert result.width > DISPLAY_W # includes leading gap
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def test_multiple_items_wider_image(self, helper):
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items = [_make_image(width=50), _make_image(width=50)]
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result = helper.create_scrolling_image(items)
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# Should be wider than two items alone
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assert result.width > 100
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def test_scroll_position_reset(self, helper):
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helper.scroll_position = 500.0
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helper.create_scrolling_image([_make_image()])
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assert helper.scroll_position == 0.0
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def test_cached_array_set(self, helper):
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helper.create_scrolling_image([_make_image()])
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assert helper.cached_array is not None
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def test_scroll_complete_reset(self, helper):
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helper.scroll_complete = True
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helper.create_scrolling_image([_make_image()])
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assert helper.scroll_complete is False
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def test_total_scroll_width_matches_image(self, helper):
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img = _make_image(width=200)
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result = helper.create_scrolling_image([img])
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assert helper.total_scroll_width == result.width
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# ---------------------------------------------------------------------------
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# set_scrolling_image
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# ---------------------------------------------------------------------------
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class TestSetScrollingImage:
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def test_sets_cached_image(self, helper):
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img = _make_image(width=200)
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helper.set_scrolling_image(img)
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assert helper.cached_image is img
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def test_sets_cached_array(self, helper):
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img = _make_image(width=200)
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helper.set_scrolling_image(img)
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assert helper.cached_array is not None
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def test_scroll_width_matches_image(self, helper):
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img = _make_image(width=300)
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helper.set_scrolling_image(img)
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assert helper.total_scroll_width == 300
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def test_none_clears_cache(self, helper):
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helper.set_scrolling_image(_make_image())
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helper.set_scrolling_image(None)
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assert helper.cached_image is None
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# ---------------------------------------------------------------------------
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# update_scroll_position (time-based mode)
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# ---------------------------------------------------------------------------
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class TestUpdateScrollPosition:
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def test_position_advances_over_time(self, helper):
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helper.create_scrolling_image([_make_image(width=200)])
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helper.scroll_speed = 100.0 # 100 px/s
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helper.last_update_time = time.time() - 0.1 # pretend 100ms elapsed
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initial = helper.scroll_position
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helper.update_scroll_position()
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assert helper.scroll_position > initial
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def test_no_advance_without_image(self, helper):
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helper.update_scroll_position() # no image, should not crash
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assert helper.scroll_position == 0.0
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def test_zero_width_content_stays_zero(self, helper):
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helper.create_scrolling_image([]) # empty → width 0
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helper.update_scroll_position()
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assert helper.scroll_position == 0.0
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def test_scroll_complete_clamped(self, helper):
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helper.create_scrolling_image([_make_image(width=100)])
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# Force position past the end
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helper.scroll_position = helper.total_scroll_width + 50
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helper.total_distance_scrolled = helper.total_scroll_width + 50
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helper.update_scroll_position()
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assert helper.scroll_complete is True
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assert helper.scroll_position <= helper.total_scroll_width
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# ---------------------------------------------------------------------------
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# get_visible_portion
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# ---------------------------------------------------------------------------
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class TestGetVisiblePortion:
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def test_returns_none_without_image(self, helper):
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assert helper.get_visible_portion() is None
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def test_returns_image_sized_to_display(self, helper):
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helper.create_scrolling_image([_make_image(width=200)])
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visible = helper.get_visible_portion()
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assert visible is not None
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assert visible.width == DISPLAY_W
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assert visible.height == DISPLAY_H
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def test_different_positions_give_different_images(self, helper):
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helper.create_scrolling_image([_make_image(width=300)])
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img1 = helper.get_visible_portion()
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helper.scroll_position = 50
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img2 = helper.get_visible_portion()
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# Images should differ (colour from scrolled content)
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# Just verify both are valid PIL images with correct size
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assert img1.width == img2.width == DISPLAY_W
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@pytest.mark.parametrize("start_x", [0, 1, 37, 200 - DISPLAY_W])
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def test_integer_slice_is_byte_identical_to_a_contiguous_copy(
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self, helper, start_x):
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# The integer path dropped np.ascontiguousarray() before tobytes():
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# a column slice of the strip is not C-contiguous, and tobytes()
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# must still give the same C-order bytes the copy did.
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rng = np.random.default_rng(start_x)
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strip = rng.integers(0, 256, (DISPLAY_H, 200, 3), dtype=np.uint8)
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helper.cached_array = strip
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view = strip[:, start_x:start_x + DISPLAY_W]
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assert not view.flags["C_CONTIGUOUS"]
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frame = helper._get_visible_portion_integer(start_x, start_x + DISPLAY_W)
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assert frame.tobytes() == np.ascontiguousarray(view).tobytes()
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assert view.tobytes() == np.ascontiguousarray(view).tobytes()
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# ---------------------------------------------------------------------------
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# reset_scroll / clear_cache
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# ---------------------------------------------------------------------------
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class TestResetAndClear:
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def test_reset_restores_position(self, helper):
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helper.create_scrolling_image([_make_image(width=200)])
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helper.scroll_position = 100.0
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helper.reset_scroll()
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assert helper.scroll_position == 0.0
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def test_reset_clears_complete_flag(self, helper):
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helper.scroll_complete = True
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helper.reset_scroll()
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assert helper.scroll_complete is False
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def test_reset_alias(self, helper):
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helper.scroll_position = 50.0
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helper.reset()
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assert helper.scroll_position == 0.0
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def test_clear_cache(self, helper):
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helper.create_scrolling_image([_make_image()])
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helper.clear_cache()
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assert helper.cached_image is None
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assert helper.cached_array is None
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assert helper.total_scroll_width == 0
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# ---------------------------------------------------------------------------
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# calculate_dynamic_duration
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# ---------------------------------------------------------------------------
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class TestCalculateDynamicDuration:
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def test_returns_min_when_disabled(self, helper):
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helper.dynamic_duration_enabled = False
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helper.min_duration = 30
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result = helper.calculate_dynamic_duration()
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assert result == 30
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def test_returns_min_when_no_content(self, helper):
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helper.total_scroll_width = 0
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helper.min_duration = 30
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result = helper.calculate_dynamic_duration()
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assert result == 30
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def test_respects_min_duration(self, helper):
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helper.create_scrolling_image([_make_image(width=50)])
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helper.min_duration = 60
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helper.max_duration = 300
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helper.scroll_speed = 500.0 # very fast → very short time
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result = helper.calculate_dynamic_duration()
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assert result >= 60
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def test_respects_max_duration(self, helper):
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helper.create_scrolling_image([_make_image(width=5000)])
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helper.min_duration = 10
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helper.max_duration = 60
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helper.scroll_speed = 1.0 # very slow → very long time
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result = helper.calculate_dynamic_duration()
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assert result <= 60
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def test_time_based_calculation(self, helper):
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helper.create_scrolling_image([_make_image(width=200)])
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helper.scroll_speed = 100.0
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helper.min_duration = 1
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helper.max_duration = 600
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helper.frame_based_scrolling = False
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result = helper.calculate_dynamic_duration()
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assert isinstance(result, int)
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assert result > 0
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# ---------------------------------------------------------------------------
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# set_* configuration methods
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# ---------------------------------------------------------------------------
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class TestSetMethods:
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def test_set_scroll_speed_time_based(self, helper):
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helper.frame_based_scrolling = False
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helper.set_scroll_speed(50.0)
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assert helper.scroll_speed == 50.0
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def test_set_scroll_speed_clamped_low(self, helper):
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helper.frame_based_scrolling = False
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helper.set_scroll_speed(0.0)
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assert helper.scroll_speed >= 1.0
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def test_set_scroll_speed_clamped_high(self, helper):
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helper.frame_based_scrolling = False
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helper.set_scroll_speed(10000.0)
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assert helper.scroll_speed <= 500.0
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def test_set_scroll_delay(self, helper):
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helper.set_scroll_delay(0.05)
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assert helper.scroll_delay == 0.05
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def test_set_scroll_delay_clamped(self, helper):
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helper.set_scroll_delay(0.0001)
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assert helper.scroll_delay >= 0.001
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def test_set_target_fps(self, helper):
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helper.set_target_fps(60.0)
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assert helper.target_fps == 60.0
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def test_set_target_fps_clamped(self, helper):
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helper.set_target_fps(1000.0)
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assert helper.target_fps <= 200.0
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def test_set_sub_pixel_scrolling(self, helper):
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helper.set_sub_pixel_scrolling(True)
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assert helper.sub_pixel_scrolling is True
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helper.set_sub_pixel_scrolling(False)
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assert helper.sub_pixel_scrolling is False
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def test_set_frame_based_scrolling(self, helper):
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helper.set_frame_based_scrolling(True)
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assert helper.frame_based_scrolling is True
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def test_set_dynamic_duration_settings(self, helper):
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helper.set_dynamic_duration_settings(enabled=True, min_duration=20, max_duration=120, buffer=0.2)
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assert helper.dynamic_duration_enabled is True
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assert helper.min_duration == 20
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assert helper.max_duration == 120
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assert helper.duration_buffer == pytest.approx(0.2)
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# ---------------------------------------------------------------------------
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# get_scroll_info
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# ---------------------------------------------------------------------------
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class TestGetScrollInfo:
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def test_returns_dict(self, helper):
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info = helper.get_scroll_info()
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assert isinstance(info, dict)
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def test_required_keys(self, helper):
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info = helper.get_scroll_info()
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for key in ("scroll_position", "total_distance_scrolled", "scroll_speed",
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"scroll_complete", "dynamic_duration"):
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assert key in info
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def test_scroll_position_reflected(self, helper):
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helper.scroll_position = 42.0
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info = helper.get_scroll_info()
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assert info["scroll_position"] == 42.0
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class TestFrameStatsPercentiles:
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"""The stats line is the instrument this whole scroll change is measured
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with, so its median and p95 have to be the real ones.
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Both are also thresholds: stalls are counted at 1.5x the median and skips
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at 0.5x, so an off-by-one in the median biases the counts as well as the
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printed numbers.
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"""
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# 100 samples of 1..100ms. True median 50.5ms (the mean of the two middle
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# samples, not the upper one at 51ms); nearest-rank p95 is the 95th
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# sample at 95ms, not the 96th at 96ms.
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HUNDRED = [i / 1000.0 for i in range(1, 101)]
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def test_even_window_median_averages_both_middle_samples(self):
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assert frame_stats(self.HUNDRED)["median"] == pytest.approx(0.0505)
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def test_p95_uses_nearest_rank(self):
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assert frame_stats(self.HUNDRED)["p95"] == pytest.approx(0.095)
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def test_odd_window_median_is_the_middle_sample(self):
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times = [i / 1000.0 for i in range(1, 102)] # 101 samples
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assert frame_stats(times)["median"] == pytest.approx(0.051)
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def test_single_sample_window_does_not_index_out_of_range(self):
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stats = frame_stats([0.010])
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assert stats["median"] == pytest.approx(0.010)
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assert stats["p95"] == pytest.approx(0.010)
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assert stats["min"] == stats["max"] == pytest.approx(0.010)
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def test_two_sample_window(self):
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stats = frame_stats([0.010, 0.020])
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assert stats["median"] == pytest.approx(0.015)
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assert stats["p95"] == pytest.approx(0.020)
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def test_input_order_does_not_matter(self):
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assert frame_stats(list(reversed(self.HUNDRED))) == frame_stats(self.HUNDRED)
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def test_caller_window_is_not_mutated(self):
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times = [0.030, 0.010, 0.020]
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frame_stats(times)
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assert times == [0.030, 0.010, 0.020]
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def test_stall_threshold_follows_the_median(self):
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# Ten 10ms frames and two 30ms stalls: median 10ms, so >15ms is a
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# stall -- exactly the two.
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stats = frame_stats([0.010] * 10 + [0.030] * 2)
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assert stats["stalls"] == 2
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assert stats["skips"] == 0
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def test_skips_are_frames_that_never_reached_the_panel(self):
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stats = frame_stats([0.010] * 10 + [0.002] * 3)
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assert stats["skips"] == 3
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assert stats["stalls"] == 0
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def test_fps_is_the_reciprocal_of_the_mean(self):
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assert frame_stats([0.010] * 50)["fps"] == pytest.approx(100.0)
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def test_formatted_line_reports_the_corrected_values(self):
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line = format_frame_stats(self.HUNDRED)
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assert "median 50.50ms" in line, line
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assert "p95 95.00ms" in line, line
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assert "over 100 frames" in line, line
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def test_log_frame_rate_emits_the_line_and_clears_the_window(self, helper):
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helper._window = [0.010] * 20
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helper.last_frame_time = time.time() # arm the clock; see below
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helper.last_fps_log_time = 0.0 # force the 5s boundary
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with patch.object(helper.logger, "info") as info:
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helper.log_frame_rate()
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assert info.called
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assert "Scroll frame stats" in info.call_args[0][0]
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assert helper._window == []
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class TestFrameStatsLogLevel:
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"""The stats line is INFO only when a window is degraded, on the window
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that recovers, and as a 5-minute heartbeat; every other window is DEBUG.
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Every 5s from every scroller at INFO was most of a healthy rig's journal.
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"""
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HEALTHY = [0.010] * 500
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# 10% of frames a whole refresh late: fps 90.9 against a locked 100.
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SLOW = [0.010] * 450 + [0.020] * 50
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# 2% stalled: barely moves the mean, but it is the judder to see.
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STALLING = [0.010] * 490 + [0.025] * 10
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def _log_window(self, helper, window):
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helper._window = list(window)
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helper.last_frame_time = time.time()
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helper.last_fps_log_time = 0.0
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with patch.object(helper.logger, "info") as info, \
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patch.object(helper.logger, "debug") as debug, \
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patch.object(helper.logger, "isEnabledFor", return_value=True):
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helper.log_frame_rate()
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return info, debug
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def test_degraded_predicate(self):
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from src.common.scroll_helper import frame_stats_degraded
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assert not frame_stats_degraded(frame_stats(self.HEALTHY))
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assert frame_stats_degraded(frame_stats(self.SLOW))
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assert frame_stats_degraded(frame_stats(self.STALLING))
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# One stall in 500 is a normal wobble, not degraded.
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assert not frame_stats_degraded(
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frame_stats([0.010] * 499 + [0.025]))
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def test_first_window_is_info_as_a_heartbeat(self, helper):
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info, debug = self._log_window(helper, self.HEALTHY)
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assert info.called and not debug.called
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def test_healthy_window_after_the_heartbeat_is_debug(self, helper):
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helper._stats_last_info_log = time.time()
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info, debug = self._log_window(helper, self.HEALTHY)
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assert not info.called
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assert "Scroll frame stats" in debug.call_args[0][0]
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@pytest.mark.parametrize("window", ["SLOW", "STALLING"])
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def test_degraded_window_is_info(self, helper, window):
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helper._stats_last_info_log = time.time()
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info, debug = self._log_window(helper, getattr(self, window))
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assert "Scroll frame stats" in info.call_args[0][0]
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assert not debug.called
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def test_recovery_window_is_info_then_quiet(self, helper):
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helper._stats_last_info_log = time.time()
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self._log_window(helper, self.SLOW)
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|
info, _ = self._log_window(helper, self.HEALTHY)
|
|
assert info.called, "the recovery was not reported"
|
|
info, debug = self._log_window(helper, self.HEALTHY)
|
|
assert not info.called and debug.called
|
|
|
|
def test_heartbeat_comes_back_after_the_interval(self, helper):
|
|
from src.common.scroll_helper import STATS_HEARTBEAT_INTERVAL
|
|
helper._stats_last_info_log = time.time() - STATS_HEARTBEAT_INTERVAL - 1
|
|
info, _ = self._log_window(helper, self.HEALTHY)
|
|
assert info.called
|
|
|
|
def test_reset_scroll_does_not_rearm_the_heartbeat(self, helper):
|
|
helper._stats_last_info_log = time.time()
|
|
helper.reset_scroll()
|
|
info, _ = self._log_window(helper, self.HEALTHY)
|
|
assert not info.called
|
|
|
|
|
|
class TestIdleGapIsNotAFrame:
|
|
"""The first frame of a scroll has no predecessor, so timing one measures
|
|
the idle gap since the last scroll rather than a frame.
|
|
|
|
Left in, that gap lands in the max field of otherwise healthy windows and
|
|
counts as one stall per scroll start -- about 0.2% at 500 frames to a
|
|
window, which is the same order as the real stall rates it sits next to.
|
|
The stall rate is the number used to judge whether a scroll change worked,
|
|
so it has to be clean.
|
|
"""
|
|
|
|
def test_clock_starts_unarmed(self, helper):
|
|
assert helper.last_frame_time is None
|
|
|
|
def test_first_frame_seeds_the_clock_without_sampling(self, helper):
|
|
helper.log_frame_rate()
|
|
assert helper.last_frame_time is not None
|
|
assert helper._window == []
|
|
assert helper.frame_times == []
|
|
|
|
def test_second_frame_is_sampled(self, helper):
|
|
helper.log_frame_rate()
|
|
helper.log_frame_rate()
|
|
assert len(helper._window) == 1
|
|
|
|
def test_reset_scroll_disarms_the_clock(self, helper):
|
|
helper.log_frame_rate()
|
|
assert helper.last_frame_time is not None
|
|
helper.reset_scroll()
|
|
assert helper.last_frame_time is None
|
|
|
|
def test_gap_longer_than_the_log_interval_is_dropped(self, helper):
|
|
"""Covers callers that scroll without ever calling reset_scroll()."""
|
|
helper.last_frame_time = time.time() - 137.0 # a real observed gap
|
|
helper.log_frame_rate()
|
|
assert helper._window == []
|
|
assert helper.frame_times == []
|
|
|
|
def test_a_gap_does_not_reach_the_stats_line(self, helper):
|
|
helper.last_frame_time = time.time() - 137.0
|
|
helper.last_fps_log_time = 0.0 # the 5s boundary is also due
|
|
with patch.object(helper.logger, "info") as info:
|
|
helper.log_frame_rate()
|
|
assert not info.called, "the idle gap was reported as a frame"
|
|
|
|
def test_window_of_only_gaps_logs_nothing(self, helper):
|
|
"""A window whose every sample was dropped has nothing to report --
|
|
and reporting the gap itself is the bug this guards."""
|
|
helper.last_fps_log_time = 0.0
|
|
with patch.object(helper.logger, "info") as info:
|
|
helper.log_frame_rate() # seeds
|
|
helper.last_frame_time = time.time() - 137.0
|
|
helper.log_frame_rate() # dropped
|
|
assert not info.called
|
|
|
|
def test_seeding_restarts_the_window_timer(self, helper):
|
|
"""A new scroll should not open by reporting a one-frame window."""
|
|
helper.last_fps_log_time = 0.0 # boundary long overdue
|
|
helper.log_frame_rate() # seeds
|
|
with patch.object(helper.logger, "info") as info:
|
|
helper.log_frame_rate() # first real frame
|
|
assert not info.called
|
|
assert len(helper._window) == 1
|
|
|
|
def test_a_dropped_gap_restarts_the_window_timer_too(self, helper):
|
|
"""The size-guard path is the one scrollers that never call
|
|
reset_scroll() take, so it must restart the window like the sentinel
|
|
does, or their next scroll opens with a one-frame stats line."""
|
|
helper.log_frame_rate() # seeds
|
|
helper.last_frame_time = time.time() - 137.0
|
|
helper.last_fps_log_time = 0.0 # boundary long overdue
|
|
with patch.object(helper.logger, "info") as info:
|
|
helper.log_frame_rate() # the gap, dropped
|
|
helper.log_frame_rate() # first real frame
|
|
assert not info.called, "a one-frame window was reported"
|
|
assert len(helper._window) == 1
|
|
|
|
def test_a_normal_frame_still_counts(self, helper):
|
|
helper.last_frame_time = time.time() - 0.010
|
|
helper.log_frame_rate()
|
|
assert len(helper._window) == 1
|
|
assert helper._window[0] == pytest.approx(0.010, abs=0.005)
|