tests: add/update tests/test_fpforge.py

tests/test_fpforge.py

@@ -0,0 +1,77 @@
+"""Profile generator — seed reproducibility and basic shape."""
+import pytest
+
+from invisible_playwright._fpforge import (
+    Profile,
+    GPUProfile,
+    ScreenProfile,
+    HardwareProfile,
+    AudioProfile,
+    generate_profile,
+)
+
+
+def test_profile_has_expected_fields():
+    p = generate_profile(seed=42)
+    assert isinstance(p.gpu, GPUProfile)
+    assert isinstance(p.screen, ScreenProfile)
+    assert isinstance(p.hardware, HardwareProfile)
+    assert isinstance(p.audio, AudioProfile)
+
+
+def test_same_seed_reproduces_profile():
+    a = generate_profile(seed=1234)
+    b = generate_profile(seed=1234)
+    assert a.gpu.renderer == b.gpu.renderer
+    assert a.gpu.vendor == b.gpu.vendor
+    assert a.screen.width == b.screen.width
+    assert a.screen.height == b.screen.height
+    assert a.hardware.concurrency == b.hardware.concurrency
+
+
+def test_different_seeds_produce_different_profiles():
+    a = generate_profile(seed=1)
+    b = generate_profile(seed=999)
+    # Not every field needs to differ, but at least one should
+    diffs = [
+        a.gpu.renderer != b.gpu.renderer,
+        a.screen.width != b.screen.width,
+        a.hardware.concurrency != b.hardware.concurrency,
+        a.audio.sample_rate != b.audio.sample_rate,
+    ]
+    assert any(diffs), "seeds 1 and 999 produced identical profiles across all sampled fields"
+
+
+def test_screen_dimensions_are_positive_integers():
+    p = generate_profile(seed=42)
+    assert isinstance(p.screen.width, int) and p.screen.width > 0
+    assert isinstance(p.screen.height, int) and p.screen.height > 0
+    # Sanity: not larger than 8K, not smaller than 1024
+    assert 1024 <= p.screen.width <= 7680
+    assert 600 <= p.screen.height <= 4320
+
+
+def test_hardware_concurrency_in_realistic_range():
+    p = generate_profile(seed=42)
+    # Real consumer hardware: 2-32 logical CPUs. Anything outside is a sampler bug.
+    assert 2 <= p.hardware.concurrency <= 32
+
+
+def test_audio_sample_rate_is_standard():
+    p = generate_profile(seed=42)
+    # Real audio devices report one of these standard rates
+    assert p.audio.sample_rate in (44100, 48000, 96000)
+
+
+def test_gpu_renderer_is_non_empty_string():
+    p = generate_profile(seed=42)
+    assert isinstance(p.gpu.renderer, str) and p.gpu.renderer.strip()
+    assert isinstance(p.gpu.vendor, str) and p.gpu.vendor.strip()
+
+
+@pytest.mark.parametrize("seed", [1, 42, 100, 9999, 2**31 - 1])
+def test_generation_is_stable_across_seed_range(seed):
+    """No exceptions on a representative seed range."""
+    p = generate_profile(seed=seed)
+    assert p.gpu.renderer
+    assert p.screen.width > 0