From 71ca505732eb2cfe9b5a1f1d3eee91390a94de86 Mon Sep 17 00:00:00 2001
From: Ben Letham <bletham@gmail.com>
Date: Tue, 4 Feb 2020 15:40:04 -0800
Subject: [PATCH] Add test for cross validation with invalid metrics

---
 python/fbprophet/tests/test_diagnostics.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/python/fbprophet/tests/test_diagnostics.py b/python/fbprophet/tests/test_diagnostics.py
index 5c760bd..d50d859 100644
--- a/python/fbprophet/tests/test_diagnostics.py
+++ b/python/fbprophet/tests/test_diagnostics.py
@@ -164,6 +164,11 @@ class TestDiagnostics(TestCase):
             df_cv, metrics=['mape'],
         )
         self.assertIsNone(df_horizon)
+        # List of metrics containing non-valid metrics
+        with self.assertRaises(ValueError):
+            diagnostics.performance_metrics(
+                df_cv, metrics=['mse', 'error_metric'],
+            )
 
     def test_rolling_mean(self):
         x = np.arange(10)