Upgradability test: download contracts from github, master branch

nucypher/blockchain/eth/sol/compile.py

@@ -112,10 +112,8 @@ class SolidityCompiler:
                 except KeyError:
                     existence_data = dict()
                     interfaces.update({name: existence_data})
-                if version in existence_data and existence_data[version] != data:
-                    raise self.CompilerError(
-                        "Contract set contains two copies of {}:{} but with different data".format(name, version))
-                existence_data.update({version: data})
+                if version not in existence_data:
+                    existence_data.update({version: data})
         return interfaces
 
     def _compile(self, root_source_dir: str, other_source_dirs: [str]) -> dict:

tests/blockchain/eth/contracts/integration/test_contracts_upgradability.py

@@ -0,0 +1,69 @@
+"""
+This file is part of nucypher.
+
+nucypher is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+nucypher is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
+"""
+import os
+import tempfile
+
+import pytest
+import requests
+
+from nucypher.blockchain.eth.sol.compile import SolidityCompiler, SourceDirs
+from nucypher.crypto.powers import TransactingPower
+from nucypher.utilities.sandbox.constants import INSECURE_DEVELOPMENT_PASSWORD
+
+USER = "nucypher"
+REPO = "nucypher"
+BRANCH = "master"
+GITHUB_SOURCE_LINK = f"https://api.github.com/repos/{USER}/{REPO}/contents/nucypher/blockchain/eth/sol/source?ref={BRANCH}"
+
+
+def download_github_dir(source_link: str, target_folder: str):
+    response = requests.get(source_link)
+    if response.status_code != 200:
+        error = f"Failed to call api {source_link} with status code {response.status_code}"
+        raise RuntimeError(error)
+
+    for content in response.json():
+        path = os.path.join(target_folder, content["name"])
+        if content["type"] == "dir":
+            os.mkdir(path)
+            download_github_dir(content["url"], path)
+        else:
+            download_github_file(content["download_url"], path)
+
+
+def download_github_file(source_link: str, target_folder: str):
+    response = requests.get(source_link)
+    if response.status_code != 200:
+        error = f"Failed to call api {source_link} with status code {response.status_code}"
+        raise RuntimeError(error)
+
+    raw_data = response.content
+    with open(target_folder, 'wb') as registry_file:
+        registry_file.seek(0)
+        registry_file.write(raw_data)
+        registry_file.truncate()
+
+
+@pytest.mark.slow
+def test_upgradability():
+    with tempfile.TemporaryDirectory() as temp_dir:
+        download_github_dir(GITHUB_SOURCE_LINK, temp_dir)
+        solidity_compiler = SolidityCompiler(source_dirs=[SourceDirs(SolidityCompiler.default_contract_dir()),
+                                                          SourceDirs(temp_dir)])
+        interfaces = solidity_compiler.compile()
+        pass
+    pass