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# Copyright 2020 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Tests for the metadata abstraction that's used in the asynchronous driver."""
import logging
import unittest
from grpc.experimental.aio import Metadata
class TestTypeMetadata(unittest.TestCase):
"""Tests for the metadata type"""
_DEFAULT_DATA = (("key1", "value1"), ("key2", "value2"))
_MULTI_ENTRY_DATA = (
("key1", "value1"),
("key1", "other value 1"),
("key2", "value2"),
)
def test_init_metadata(self):
test_cases = {
"emtpy": (),
"with-single-data": self._DEFAULT_DATA,
"with-multi-data": self._MULTI_ENTRY_DATA,
}
for case, args in test_cases.items():
with self.subTest(case=case):
metadata = Metadata(*args)
self.assertEqual(len(metadata), len(args))
def test_get_item(self):
metadata = Metadata(
("key", "value1"), ("key", "value2"), ("key2", "other value")
)
self.assertEqual(metadata["key"], "value1")
self.assertEqual(metadata["key2"], "other value")
self.assertEqual(metadata.get("key"), "value1")
self.assertEqual(metadata.get("key2"), "other value")
with self.assertRaises(KeyError):
metadata["key not found"]
self.assertIsNone(metadata.get("key not found"))
def test_add_value(self):
metadata = Metadata()
metadata.add("key", "value")
metadata.add("key", "second value")
metadata.add("key2", "value2")
self.assertEqual(metadata["key"], "value")
self.assertEqual(metadata["key2"], "value2")
def test_get_all_items(self):
metadata = Metadata(*self._MULTI_ENTRY_DATA)
self.assertEqual(metadata.get_all("key1"), ["value1", "other value 1"])
self.assertEqual(metadata.get_all("key2"), ["value2"])
self.assertEqual(metadata.get_all("non existing key"), [])
def test_container(self):
metadata = Metadata(*self._MULTI_ENTRY_DATA)
self.assertIn("key1", metadata)
def test_equals(self):
metadata = Metadata()
for key, value in self._DEFAULT_DATA:
metadata.add(key, value)
metadata2 = Metadata(*self._DEFAULT_DATA)
self.assertEqual(metadata, metadata2)
self.assertNotEqual(metadata, "foo")
def test_repr(self):
metadata = Metadata(*self._DEFAULT_DATA)
expected = "Metadata({0!r})".format(self._DEFAULT_DATA)
self.assertEqual(repr(metadata), expected)
def test_set(self):
metadata = Metadata(*self._MULTI_ENTRY_DATA)
override_value = "override value"
for _ in range(3):
metadata["key1"] = override_value
self.assertEqual(metadata["key1"], override_value)
self.assertEqual(
metadata.get_all("key1"), [override_value, "other value 1"]
)
empty_metadata = Metadata()
for _ in range(3):
empty_metadata["key"] = override_value
self.assertEqual(empty_metadata["key"], override_value)
self.assertEqual(empty_metadata.get_all("key"), [override_value])
def test_set_all(self):
metadata = Metadata(*self._DEFAULT_DATA)
metadata.set_all("key", ["value1", b"new value 2"])
self.assertEqual(metadata["key"], "value1")
self.assertEqual(metadata.get_all("key"), ["value1", b"new value 2"])
def test_delete_values(self):
metadata = Metadata(*self._MULTI_ENTRY_DATA)
del metadata["key1"]
self.assertEqual(metadata.get("key1"), "other value 1")
metadata.delete_all("key1")
self.assertNotIn("key1", metadata)
metadata.delete_all("key2")
self.assertEqual(len(metadata), 0)
with self.assertRaises(KeyError):
del metadata["other key"]
def test_metadata_from_tuple(self):
scenarios = (
(None, Metadata()),
(Metadata(), Metadata()),
(self._DEFAULT_DATA, Metadata(*self._DEFAULT_DATA)),
(self._MULTI_ENTRY_DATA, Metadata(*self._MULTI_ENTRY_DATA)),
(Metadata(*self._DEFAULT_DATA), Metadata(*self._DEFAULT_DATA)),
)
for source, expected in scenarios:
with self.subTest(raw_metadata=source, expected=expected):
self.assertEqual(expected, Metadata.from_tuple(source))
if __name__ == "__main__":
logging.basicConfig()
unittest.main(verbosity=2)
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