refactor: move all tests out of src/ into tests/, remove unnecessary tests

tests/blinking.rs

@@ -0,0 +1,52 @@
+use glam::U16Vec2;
+use pacman::texture::blinking::BlinkingTexture;
+use pacman::texture::sprite::AtlasTile;
+use sdl2::pixels::Color;
+
+fn mock_atlas_tile(id: u32) -> AtlasTile {
+    AtlasTile {
+        pos: U16Vec2::new(0, 0),
+        size: U16Vec2::new(16, 16),
+        color: Some(Color::RGB(id as u8, 0, 0)),
+    }
+}
+
+#[test]
+fn test_tick_multiple_blink_changes() {
+    let tile = mock_atlas_tile(1);
+    let mut texture = BlinkingTexture::new(tile, 0.5);
+
+    // First blink
+    texture.tick(0.5);
+    assert_eq!(texture.is_on(), false);
+
+    // Second blink (back to on)
+    texture.tick(0.5);
+    assert_eq!(texture.is_on(), true);
+
+    // Third blink (back to off)
+    texture.tick(0.5);
+    assert_eq!(texture.is_on(), false);
+}
+
+#[test]
+fn test_tick_partial_blink_duration() {
+    let tile = mock_atlas_tile(1);
+    let mut texture = BlinkingTexture::new(tile, 0.5);
+
+    // Tick with 1.25 blink durations
+    texture.tick(0.625);
+    assert_eq!(texture.is_on(), false);
+    assert_eq!(texture.time_bank(), 0.125);
+}
+
+#[test]
+fn test_tick_with_negative_delta_time() {
+    let tile = mock_atlas_tile(1);
+    let mut texture = BlinkingTexture::new(tile, 0.5);
+
+    // Should not cause issues
+    texture.tick(-0.1);
+    assert_eq!(texture.is_on(), true);
+    assert_eq!(texture.time_bank(), -0.1);
+}