Added timeable tests to get coverage up.

tests/test_timeable_mixin.py

@@ -57,6 +57,14 @@ class Derived(TimeableMixin):
     assert (3, "foo") == Derived._get_pprint_num_unit(3 / 20, "biz")
     assert (1.2, "biz") == Derived._get_pprint_num_unit(2.4 * 10, "foo")
 
+    try:
+        Derived._get_pprint_num_unit(1, "WRONG")
+        raise AssertionError("Should have raised an exception")
+    except LookupError:
+        pass
+    except Exception as e:
+        raise AssertionError(f"Raised the wrong exception: {e}")
+
 
 def test_context_manager():
     T = TimeableDerived()
@@ -90,5 +98,9 @@ def test_times_and_profiling():
     assert 0 == stats["decorated_takes_time_auto_key"][2]
 
     got_str = T._profile_durations()
-    want_str = "decorated_takes_time_auto_key: 2.0 sec\n" "decorated:                     1.5 ± 0.5 sec (x2)"
+    want_str = "decorated_takes_time_auto_key: 2.0 sec\ndecorated:                     1.5 ± 0.5 sec (x2)"
+    assert want_str == got_str, f"Want:\n{want_str}\nGot:\n{got_str}"
+
+    got_str = T._profile_durations(only_keys=["decorated_takes_time_auto_key"])
+    want_str = "decorated_takes_time_auto_key: 2.0 sec"
     assert want_str == got_str, f"Want:\n{want_str}\nGot:\n{got_str}"