Test to check reusing components

src/world.zig

@@ -339,3 +339,28 @@ test "World REST API" {
 
     world.quit();
 }
+
+test "World delete and reuse component" {
+    flecszigble.init(std.testing.allocator);
+    var world = try World(void).initMinimal();
+    defer world.deinit();
+
+    const Position = struct { x: f32, y: f32 };
+
+    const position_1 = try world.component(Position);
+    // Remove default component cleanup policy to allow deletion of the component.
+    position_1.remove(.{ flecs.core.OnDelete, flecs.core.Panic });
+
+    const entity = try world.entity(.{}, .{Position});
+    entity.set(Position, .{ .x = 1.0, .y = 2.0 });
+    try expect.equal(.{ .x = 1.0, .y = 2.0 }, entity.get(Position));
+
+    // Deleting the component automatically removes it from any entity.
+    position_1.delete();
+
+    const position_2 = try world.component(Position);
+    try expect.equal(position_2, world.lookupType(Position));
+
+    entity.set(Position, .{ .x = 2.0, .y = 4.0 });
+    try expect.equal(.{ .x = 2.0, .y = 4.0 }, entity.get(Position));
+}