1 files changed, 57 insertions, 0 deletions
diff --git a/tests/test_error.py b/tests/test_error.py
new file mode 100644
index 0000000..7244626
--- /dev/null
+++ b/tests/test_error.py
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: MIT
+# SPDX-FileCopyrightText: 2021 Taneli Hukkinen
+# Licensed to PSF under a Contributor Agreement.
+
+import unittest
+
+from . import tomllib
+
+
+class TestError(unittest.TestCase):
+    def test_line_and_col(self):
+        with self.assertRaises(tomllib.TOMLDecodeError) as exc_info:
+            tomllib.loads("val=.")
+        self.assertEqual(str(exc_info.exception), "Invalid value (at line 1, column 5)")
+
+        with self.assertRaises(tomllib.TOMLDecodeError) as exc_info:
+            tomllib.loads(".")
+        self.assertEqual(
+            str(exc_info.exception), "Invalid statement (at line 1, column 1)"
+        )
+
+        with self.assertRaises(tomllib.TOMLDecodeError) as exc_info:
+            tomllib.loads("\n\nval=.")
+        self.assertEqual(str(exc_info.exception), "Invalid value (at line 3, column 5)")
+
+        with self.assertRaises(tomllib.TOMLDecodeError) as exc_info:
+            tomllib.loads("\n\n.")
+        self.assertEqual(
+            str(exc_info.exception), "Invalid statement (at line 3, column 1)"
+        )
+
+    def test_missing_value(self):
+        with self.assertRaises(tomllib.TOMLDecodeError) as exc_info:
+            tomllib.loads("\n\nfwfw=")
+        self.assertEqual(str(exc_info.exception), "Invalid value (at end of document)")
+
+    def test_invalid_char_quotes(self):
+        with self.assertRaises(tomllib.TOMLDecodeError) as exc_info:
+            tomllib.loads("v = '\n'")
+        self.assertTrue(" '\\n' " in str(exc_info.exception))
+
+    def test_module_name(self):
+        self.assertEqual(tomllib.TOMLDecodeError().__module__, tomllib.__name__)
+
+    def test_invalid_parse_float(self):
+        def dict_returner(s: str) -> dict:
+            return {}
+
+        def list_returner(s: str) -> list:
+            return []
+
+        for invalid_parse_float in (dict_returner, list_returner):
+            with self.assertRaises(ValueError) as exc_info:
+                tomllib.loads("f=0.1", parse_float=invalid_parse_float)
+            self.assertEqual(
+                str(exc_info.exception), "parse_float must not return dicts or lists"
+            )