approx(): Detect type errors earlier.

2018-07-31 00:26:35 -07:00
parent ad305e71d7
commit cd2085ee71
2 changed files with 56 additions and 19 deletions
--- a/testing/python/approx.py
+++ b/testing/python/approx.py
@@ -441,6 +441,13 @@ class TestApprox(object):
            ["*At index 0 diff: 3 != 4 * {}".format(expected), "=* 1 failed in *="]
        )

+    @pytest.mark.parametrize(
+            'x', [None, 'string', ['string'], [[1]], {'key': 'string'}, {'key': {'key': 1}}]
+    )
+    def test_expected_value_type_error(self, x):
+        with pytest.raises(TypeError):
+            approx(x)
+
    @pytest.mark.parametrize(
        "op",
        [