tests: add/update tests/test_prefs.py

tests/test_prefs.py

@@ -1,35 +1,44 @@
-from invisible_playwright._fpforge import generate_profile
-from invisible_playwright.prefs import translate_profile_to_prefs
-
-
-def test_translate_includes_gpu_renderer():
-    p = generate_profile(seed=42)
-    prefs = translate_profile_to_prefs(p)
-    assert prefs["zoom.stealth.webgl.renderer"] == p.gpu.renderer
-    assert prefs["zoom.stealth.webgl.vendor"] == p.gpu.vendor
-
-
-def test_translate_includes_screen():
-    p = generate_profile(seed=42)
-    prefs = translate_profile_to_prefs(p)
-    assert prefs["zoom.stealth.screen.width"] == p.screen.width
-    assert prefs["zoom.stealth.screen.height"] == p.screen.height
-
-
-def test_translate_is_deterministic_per_seed():
-    a = translate_profile_to_prefs(generate_profile(seed=42))
-    b = translate_profile_to_prefs(generate_profile(seed=42))
-    assert a == b
-
-
-def test_translate_varies_across_seeds():
-    a = translate_profile_to_prefs(generate_profile(seed=1))
-    b = translate_profile_to_prefs(generate_profile(seed=2))
-    assert a != b
-
-
-def test_translate_has_stealth_baseline_constants():
-    p = generate_profile(seed=42)
-    prefs = translate_profile_to_prefs(p)
-    assert prefs.get("privacy.resistFingerprinting") is False
-    assert "media.peerconnection.enabled" in prefs
+import sys
+
+import pytest
+
+from invisible_playwright._fpforge import generate_profile
+from invisible_playwright.prefs import translate_profile_to_prefs
+
+
+@pytest.mark.skipif(
+    not sys.platform.startswith("linux"),
+    reason="Renderer is only spoofed via pref on Linux; on Windows the native ANGLE "
+           "string is preserved to keep the WebGL parameters hash coherent",
+)
+def test_translate_includes_gpu_renderer():
+    p = generate_profile(seed=42)
+    prefs = translate_profile_to_prefs(p)
+    assert prefs["zoom.stealth.webgl.renderer"] == p.gpu.renderer
+    assert prefs["zoom.stealth.webgl.vendor"] == p.gpu.vendor
+
+
+def test_translate_includes_screen():
+    p = generate_profile(seed=42)
+    prefs = translate_profile_to_prefs(p)
+    assert prefs["zoom.stealth.screen.width"] == p.screen.width
+    assert prefs["zoom.stealth.screen.height"] == p.screen.height
+
+
+def test_translate_is_deterministic_per_seed():
+    a = translate_profile_to_prefs(generate_profile(seed=42))
+    b = translate_profile_to_prefs(generate_profile(seed=42))
+    assert a == b
+
+
+def test_translate_varies_across_seeds():
+    a = translate_profile_to_prefs(generate_profile(seed=1))
+    b = translate_profile_to_prefs(generate_profile(seed=2))
+    assert a != b
+
+
+def test_translate_has_stealth_baseline_constants():
+    p = generate_profile(seed=42)
+    prefs = translate_profile_to_prefs(p)
+    assert prefs.get("privacy.resistFingerprinting") is False
+    assert "media.peerconnection.enabled" in prefs