feat: add configuration module with YAML loading and defaults

Made-with: Cursor

tests/test_config.py

@@ -0,0 +1,56 @@
+import pytest
+from pathlib import Path
+from cursor_flasher.config import Config, load_config, DEFAULT_CONFIG_PATH
+
+
+class TestDefaultConfig:
+    def test_has_pulse_settings(self):
+        cfg = Config()
+        assert cfg.pulse_color == "#FF9500"
+        assert cfg.pulse_width == 4
+        assert cfg.pulse_speed == 1.5
+        assert cfg.pulse_opacity_min == 0.3
+        assert cfg.pulse_opacity_max == 1.0
+
+    def test_has_sound_settings(self):
+        cfg = Config()
+        assert cfg.sound_enabled is True
+        assert cfg.sound_name == "Glass"
+        assert cfg.sound_volume == 0.5
+
+    def test_has_detection_settings(self):
+        cfg = Config()
+        assert cfg.poll_interval == 0.5
+        assert cfg.cooldown == 3.0
+
+    def test_has_timeout_settings(self):
+        cfg = Config()
+        assert cfg.auto_dismiss == 300
+
+
+class TestLoadConfig:
+    def test_loads_from_yaml(self, tmp_path):
+        config_file = tmp_path / "config.yaml"
+        config_file.write_text(
+            "pulse:\n"
+            '  color: "#00FF00"\n'
+            "  width: 8\n"
+            "sound:\n"
+            "  enabled: false\n"
+        )
+        cfg = load_config(config_file)
+        assert cfg.pulse_color == "#00FF00"
+        assert cfg.pulse_width == 8
+        assert cfg.sound_enabled is False
+        assert cfg.pulse_speed == 1.5
+        assert cfg.sound_name == "Glass"
+
+    def test_missing_file_returns_defaults(self, tmp_path):
+        cfg = load_config(tmp_path / "nonexistent.yaml")
+        assert cfg.pulse_color == "#FF9500"
+
+    def test_empty_file_returns_defaults(self, tmp_path):
+        config_file = tmp_path / "config.yaml"
+        config_file.write_text("")
+        cfg = load_config(config_file)
+        assert cfg.pulse_color == "#FF9500"