giga fix

tests/test_processing.py

@@ -9,9 +9,15 @@ from rfg_adc_plotter.constants import FFT_LEN, SWEEP_FREQ_MAX_GHZ, SWEEP_FREQ_MI
 from rfg_adc_plotter.gui.pyqtgraph_backend import (
     apply_working_range,
     apply_working_range_to_aux_curves,
+    build_main_window_layout,
     coalesce_packets_for_ui,
     compute_background_subtracted_bscan_levels,
     decimate_curve_for_display,
+    resolve_axis_bounds,
+    resolve_heavy_refresh_stride,
+    resolve_initial_window_size,
+    sanitize_curve_data_for_display,
+    sanitize_image_for_display,
     resolve_visible_fft_curves,
     resolve_visible_aux_curves,
 )
@@ -253,6 +259,72 @@ class ProcessingTests(unittest.TestCase):
         self.assertEqual(len(kept), 1)
         self.assertEqual(int(kept[0][1]["sweep"]), 1)
 
+    def test_coalesce_packets_for_ui_switches_to_latest_only_on_large_backlog(self):
+        packets = [
+            (np.asarray([float(idx)], dtype=np.float32), {"sweep": idx}, None)
+            for idx in range(40)
+        ]
+
+        kept, skipped = coalesce_packets_for_ui(packets, max_packets=8, backlog_packets=40)
+
+        self.assertEqual(skipped, 39)
+        self.assertEqual(len(kept), 1)
+        self.assertEqual(int(kept[0][1]["sweep"]), 39)
+
+    def test_resolve_heavy_refresh_stride_increases_with_backlog(self):
+        self.assertEqual(resolve_heavy_refresh_stride(0, max_packets=8), 1)
+        self.assertEqual(resolve_heavy_refresh_stride(20, max_packets=8), 2)
+        self.assertEqual(resolve_heavy_refresh_stride(40, max_packets=8), 4)
+
+    def test_sanitize_curve_data_for_display_rejects_fully_nonfinite_series(self):
+        xs, ys = sanitize_curve_data_for_display(
+            np.asarray([np.nan, np.nan], dtype=np.float64),
+            np.asarray([np.nan, np.nan], dtype=np.float32),
+        )
+
+        self.assertEqual(xs.shape, (0,))
+        self.assertEqual(ys.shape, (0,))
+
+    def test_sanitize_image_for_display_rejects_fully_nonfinite_frame(self):
+        data = sanitize_image_for_display(np.full((4, 4), np.nan, dtype=np.float32))
+
+        self.assertIsNone(data)
+
+    def test_resolve_axis_bounds_rejects_nonfinite_ranges(self):
+        bounds = resolve_axis_bounds(np.asarray([np.nan, np.inf], dtype=np.float64))
+
+        self.assertIsNone(bounds)
+
+    def test_resolve_initial_window_size_stays_within_small_screen(self):
+        width, height = resolve_initial_window_size(800, 480)
+
+        self.assertLessEqual(width, 800)
+        self.assertLessEqual(height, 480)
+        self.assertGreaterEqual(width, 640)
+        self.assertGreaterEqual(height, 420)
+
+    def test_build_main_window_layout_uses_splitter_and_scroll_area(self):
+        os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")
+        try:
+            from PyQt5 import QtCore, QtWidgets
+        except Exception as exc:  # pragma: no cover - environment-dependent
+            self.skipTest(f"Qt unavailable: {exc}")
+
+        app = QtWidgets.QApplication.instance() or QtWidgets.QApplication([])
+        main_window = QtWidgets.QWidget()
+        try:
+            _layout, splitter, _plot_layout, settings_widget, settings_layout, settings_scroll = build_main_window_layout(
+                QtCore,
+                QtWidgets,
+                main_window,
+            )
+            self.assertIsInstance(splitter, QtWidgets.QSplitter)
+            self.assertIsInstance(settings_scroll, QtWidgets.QScrollArea)
+            self.assertIs(settings_scroll.widget(), settings_widget)
+            self.assertIsInstance(settings_layout, QtWidgets.QVBoxLayout)
+        finally:
+            main_window.close()
+
     def test_background_subtracted_bscan_levels_ignore_zero_floor(self):
         disp_fft_lin = np.zeros((4, 8), dtype=np.float32)
         disp_fft_lin[1, 2:6] = np.asarray([0.05, 0.1, 0.5, 2.0], dtype=np.float32)