changes

crates/adapters/weather/tests/wmo_test.rs

@@ -0,0 +1,60 @@
+use domain::weather::Condition;
+
+use weather::condition_for;
+
+#[test]
+fn the_documented_wmo_codes_map_onto_the_domains_vocabulary() {
+    let expected = [
+        (0, Condition::Clear),
+        (1, Condition::Clear),
+        (2, Condition::Cloudy),
+        (3, Condition::Cloudy),
+        (45, Condition::Fog),
+        (48, Condition::Fog),
+        (51, Condition::Drizzle),
+        (55, Condition::Drizzle),
+        (61, Condition::Rain),
+        (65, Condition::Rain),
+        (66, Condition::Rain),
+        (80, Condition::Rain),
+        (82, Condition::Rain),
+        (71, Condition::Snow),
+        (75, Condition::Snow),
+        (77, Condition::Snow),
+        (85, Condition::Snow),
+        (86, Condition::Snow),
+        (95, Condition::Thunderstorm),
+        (99, Condition::Thunderstorm),
+    ];
+
+    for (code, condition) in expected {
+        assert_eq!(
+            condition_for(code),
+            Some(condition),
+            "wmo code {code} should be {condition:?}"
+        );
+    }
+}
+
+#[test]
+fn a_code_the_provider_never_documents_maps_to_nothing() {
+    for code in [4, 20, 44, 50, 60, 70, 90, 100, 255] {
+        assert_eq!(
+            condition_for(code),
+            None,
+            "wmo code {code} is not documented"
+        );
+    }
+}
+
+#[test]
+fn every_condition_in_the_vocabulary_is_reachable_from_some_code() {
+    let reached: Vec<Condition> = (0..=99).filter_map(condition_for).collect();
+
+    for condition in Condition::ALL {
+        assert!(
+            reached.contains(&condition),
+            "{condition:?} cannot be produced by any wmo code"
+        );
+    }
+}