changes

crates/domain/tests/metric/steps_test.rs

@@ -0,0 +1,12 @@
+use domain::metric::Steps;
+
+#[test]
+fn a_step_count_beyond_a_days_maximum_is_rejected() {
+    assert!(Steps::new(200_001).is_err());
+}
+
+#[test]
+fn the_boundaries_of_a_days_step_count_are_valid() {
+    assert_eq!(Steps::new(0).unwrap().value(), 0);
+    assert_eq!(Steps::new(200_000).unwrap().value(), 200_000);
+}