write tests

tests/web.rs

@@ -2,7 +2,9 @@
 
 #![cfg(target_arch = "wasm32")]
 
+extern crate wasm_game_of_life;
 extern crate wasm_bindgen_test;
+use wasm_game_of_life::Universe;
 use wasm_bindgen_test::*;
 
 wasm_bindgen_test_configure!(run_in_browser);
@@ -11,3 +13,29 @@ wasm_bindgen_test_configure!(run_in_browser);
 fn pass() {
     assert_eq!(1 + 1, 2);
 }
+
+#[cfg(test)]
+pub fn input_spaceship() -> Universe {
+    let mut universe = Universe::new();
+    universe.set_width(6);
+    universe.set_height(6);
+    universe.set_cells(&[(1,2), (2,3), (3,1), (3,2), (3,3)]);
+    universe
+}
+
+#[cfg(test)]
+pub fn expected_spaceship() -> Universe {
+    let mut universe = Universe::new();
+    universe.set_width(6);
+    universe.set_height(6);
+    universe.set_cells(&[(2,1), (2,3), (3,2), (3,3), (4,2)]);
+    universe
+}
+
+#[wasm_bindgen_test]
+pub fn test_tick() {
+    let mut input_universe = input_spaceship();
+    let expected_universe = expected_spaceship();
+    input_universe.tick();
+    assert_eq!(&input_universe.get_cells(), &expected_universe.get_cells());
+}