engine_traits_tests: Another CFNamesExt test

Signed-off-by: Brian Anderson <andersrb@gmail.com>

components/engine_traits_tests/src/lib.rs

@@ -44,6 +44,18 @@ fn default_engine() -> TempDirEnginePair {
     }
 }
 
+fn engine_cfs(cfs: &[&str]) -> TempDirEnginePair {
+    use engine_test::kv::KvTestEngine;
+    use engine_test::ctor::EngineConstructorExt;
+
+    let dir = tempdir();
+    let path = dir.path().to_str().unwrap();
+    let engine = KvTestEngine::new_engine(path, None, cfs, None).unwrap();
+    TempDirEnginePair {
+        engine, tempdir: dir,
+    }
+}
+
 
 mod ctor {
     //! Constructor tests
@@ -96,3 +108,27 @@ mod basic_read_write {
         assert_eq!(expected, &*actual);
     }
 }
+
+mod cf_names {
+    use super::{default_engine, engine_cfs};
+    use engine_traits::CFNamesExt;
+    use engine_traits::{CF_DEFAULT, ALL_CFS};
+
+    #[test]
+    fn default_names() {
+        let db = default_engine();
+        let names = db.engine.cf_names();
+        assert_eq!(names.len(), 1);
+        assert_eq!(names[0], CF_DEFAULT);
+    }
+
+    #[test]
+    fn cf_names() {
+        let db = engine_cfs(ALL_CFS);
+        let names = db.engine.cf_names();
+        assert_eq!(names.len(), ALL_CFS.len());
+        for cf in ALL_CFS {
+            assert!(names.contains(cf));
+        }
+    }
+}