Adds test_read_defaults_as_directory_fail_repeated_keys

- test if we have repeated keys in one of the toml to composed
defaults aas directory.

tomlparams/tests/test_tomlparams.py

@@ -712,6 +712,22 @@ def test_content_defaults_as_directory(self, default_primary_key: str):
         )
         self.assertEqual(d_as_dir, d_as_file)
 
+    def test_read_defaults_as_directory_fail_repeated_keys(self):
+        stddir = os.path.join(XDIR, 'tomlparams')
+        userdir = os.path.join(XDIR, 'usertomlparams')
+        defaults_as_dir_repeated_keys = os.path.join(
+            stddir, 'defaults_as_dir_repeated_keys'
+        )
+        self.assertRaises(
+            KeyError,
+            lambda: TOMLParams(
+                defaults_as_dir_repeated_keys,
+                standard_params_dir=stddir,
+                user_params_dir=userdir,
+                verbose=False,
+            ),
+        )
+
 
 if __name__ == '__main__':
     unittest.main()

tomlparams/tests/testdata/tomlparams/defaults_as_dir_repeated_keys/animals/birds.toml

@@ -0,0 +1,2 @@
+[animals.birds]
+average_n_eyes = 2

tomlparams/tests/testdata/tomlparams/defaults_as_dir_repeated_keys/animals/fish/human.toml

@@ -0,0 +1,2 @@
+[human]
+average_n_eyes = 2

tomlparams/tests/testdata/tomlparams/defaults_as_dir_repeated_keys/animals/fish/salmon.toml

@@ -0,0 +1,2 @@
+[animals.fish.salmon]
+average_n_eyes = 2

tomlparams/tests/testdata/tomlparams/defaults_as_dir_repeated_keys/animals/fish/tuna.toml

@@ -0,0 +1,2 @@
+[animals.fish.tuna]
+average_n_eyes = 2

tomlparams/tests/testdata/tomlparams/defaults_as_dir_repeated_keys/fungi/ascomycota.toml

@@ -0,0 +1,2 @@
+[fungi.ascomycota]
+average_n_eyes = 0

tomlparams/tests/testdata/tomlparams/defaults_as_dir_repeated_keys/fungi/chytridiomycota.toml

@@ -0,0 +1,2 @@
+[fungi.chytridiomycota]
+average_n_eyes = 0

tomlparams/tests/testdata/tomlparams/defaults_as_dir_repeated_keys/human.toml

@@ -0,0 +1,2 @@
+[human]
+average_n_eyes = 2