Refactor tests.

tests/ops.rs

@@ -1,19 +1,23 @@
-use rhai::Engine;
+use rhai::{Engine, EvalAltResult};
 
 #[test]
-fn test_ops() {
+fn test_ops() -> Result<(), EvalAltResult> {
     let mut engine = Engine::new();
 
-    assert_eq!(engine.eval::<i64>("60 + 5"), Ok(65));
-    assert_eq!(engine.eval::<i64>("(1 + 2) * (6 - 4) / 2"), Ok(3));
+    assert_eq!(engine.eval::<i64>("60 + 5")?, 65);
+    assert_eq!(engine.eval::<i64>("(1 + 2) * (6 - 4) / 2")?, 3);
+
+    Ok(())
 }
 
 #[test]
-fn test_op_prec() {
+fn test_op_prec() -> Result<(), EvalAltResult> {
     let mut engine = Engine::new();
 
     assert_eq!(
-        engine.eval::<i64>("let x = 0; if x == 10 || true { x = 1} x"),
-        Ok(1)
+        engine.eval::<i64>("let x = 0; if x == 10 || true { x = 1} x")?,
+        1
     );
+
+    Ok(())
 }