added pytest, moved dependencies

pyproject.toml

@@ -77,9 +77,6 @@ dependencies = [
     "trio-typing>=0.10.0",
     "numba>=0.61.0",
     "pyvnc",
-    "pyqt6>=6.8.0",
-    "pyqtgraph>=0.12.3",
-    "qdarkstyle>=3.2.3",
 ]
 
 [project.optional-dependencies]
@@ -88,9 +85,6 @@ uis = [
     # TODO: make sure the levenshtein shit compiles on nix..
     # rapidfuzz = {extras = ["speedup"], version = "^0.18.0"}
     "rapidfuzz >=3.2.0, <4.0.0",
-    "qdarkstyle >=3.0.2, <4.0.0",
-    "pyqt6 >=6.7.0, <7.0.0",
-    "pyqtgraph",
 
     # for consideration,
     # - 'visidata'
@@ -121,6 +115,10 @@ dev = [
 
     # ?from git, see below.
     "xonsh",
+    "qdarkstyle >=3.0.2, <4.0.0",
+    "pyqt6 >=6.7.0, <7.0.0",
+    "pyqtgraph",
+
 ]
 
 [tool.pytest.ini_options]

tests/test_dpi_font.py

@@ -1,18 +1,34 @@
-from PyQt6 import QtGui
+import pytest
 from piker.ui._style import DpiAwareFont
 
 class MockScreen:
+    def __init__(self, pdpi, ldpi, name="MockScreen"):
+        self._pdpi = pdpi
+        self._ldpi = ldpi
+        self._name = name
+
     def physicalDotsPerInch(self):
-        return 169  # example HiDPI
+        return self._pdpi
+
     def logicalDotsPerInch(self):
-        return 96
+        return self._ldpi
+
     def name(self):
-        return "MockScreen"
+        return self._name
 
-# create font instance
-font = DpiAwareFont()
+@pytest.mark.parametrize(
+    "pdpi, ldpi",
+    [
+        (96, 96),       # normal DPI
+        (169, 96),      # HiDPI
+        (120, 96),      # mid-DPI
+    ]
+)
+def test_font_px_size(pdpi, ldpi):
+    font = DpiAwareFont()
+    font.configure_to_dpi(screen=MockScreen(pdpi, ldpi))
 
-# pass the mock screen to configure_to_dpi
-font.configure_to_dpi(screen=MockScreen())
+    px = font.px_size
+    print(f"{pdpi}x{ldpi} DPI -> Computed pixel size: {px}")
 
-print("Computed pixel size:", font.px_size)
+    assert 12 <= px <= 24