Initial commit of some code for new uploads impl.

.gitignore

@@ -11,7 +11,7 @@ __pycache__
 .coverage
 try.http
 project/
-test_*
+test_*/
 local/
 target/
 *.swp

tests/test_uploads.py

+# Copyright 2018 Markus Scheidgen
+#
+# 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.
+
+import os
+import os.path
+import shutil
+import pytest
+
+from nomad import config
+from nomad.uploads import Metadata, MetadataTimeout
+
+
+class TestMetadata:
+    @pytest.fixture(scope='function')
+    def test_dir(self):
+        path = os.path.join(config.fs.tmp, 'test_dir')
+        os.makedirs(path)
+        yield path
+        shutil.rmtree(path)
+
+    @pytest.fixture(scope='function')
+    def md(self, test_dir):
+        with Metadata(test_dir) as md:
+            yield md
+
+    def test_open_empty(self, test_dir):
+        with Metadata(test_dir):
+            pass
+
+    def test_modify(self, test_dir):
+        with Metadata(test_dir) as md:
+            md.data['key'] = 'value'
+
+        with Metadata(test_dir) as md:
+            assert 'key' in md.data
+            assert md.data['key'] == 'value'
+            assert len(md.data) == 1
+
+    def test_lock(self, test_dir):
+        timeout = False
+        with Metadata(test_dir):
+            try:
+                with Metadata(test_dir, lock_timeout=0.1):
+                    pass
+            except MetadataTimeout:
+                timeout = True
+        assert timeout
+
+    def test_insert(self, md: Metadata):
+        md.insert(dict(hash='0', data='test'))
+        assert len(md.data) == 1
+        assert '0' in md.data
+        assert md.data['0']['data'] == 'test'
+
+    def test_insert_fail(self, md: Metadata):
+        failed = False
+        md.insert(dict(hash='0', data='test'))
+        try:
+            md.insert(dict(hash='0', data='test'))
+        except Exception:
+            failed = True
+
+        assert failed
+        assert len(md.data) == 1
+
+    def test_update(self, md: Metadata):
+        md.insert(dict(hash='0', data='test'))
+        md.update(dict(hash='0', data='updated'))
+        assert len(md.data) == 1
+        assert md.data['0']['data'] == 'updated'
+
+    def test_update_fail(self, md: Metadata):
+        failed = False
+        try:
+            md.update(dict(hash='0', data='updated'))
+        except KeyError:
+            failed = True
+        assert failed
+        assert len(md.data) == 0