Add config to blueprint and fix tests madness

There was a problem related to the import of the module
`bigchaindb.web.views`.
The module, when imported, inizialises a new `Bigchain` instance, and
this is wrong for testing and because it's a bad practice.

I spent more or less 2h finding out the problem.

bigchaindb/web/server.py

@@ -2,6 +2,7 @@
 
 from flask import Flask
 
+from bigchaindb import Bigchain
 from bigchaindb.web import views
 
 
@@ -14,6 +15,7 @@ def create_app(debug=False):
 
     app = Flask(__name__)
     app.debug = debug
+    app.config['bigchain'] = Bigchain()
     app.register_blueprint(views.basic_views, url_prefix='/api/v1')
     return app
 

bigchaindb/web/views.py

@@ -5,14 +5,22 @@ For more information please refer to the documentation in Apiary:
 """
 
 import flask
-from flask import request, Blueprint
+from flask import current_app, request, Blueprint
 
 from bigchaindb import util
-from bigchaindb import Bigchain
 
 
 basic_views = Blueprint('basic_views', __name__)
-b = Bigchain()
+
+
+@basic_views.record
+def get_bigchain(state):
+    bigchain = state.app.config.get('bigchain')
+
+    if bigchain is None:
+        raise Exception('This blueprint expects you to provide '
+                        'database access through `bigchain`')
+
 
 
 @basic_views.route('/transactions/<tx_id>')
@@ -26,7 +34,9 @@ def get_transaction(tx_id):
         A JSON string containing the data about the transaction.
     """
 
-    tx = b.get_transaction(tx_id)
+    bigchain = current_app.config['bigchain']
+
+    tx = bigchain.get_transaction(tx_id)
     return flask.jsonify(**tx)
 
 
@@ -37,6 +47,7 @@ def create_transaction():
     Return:
         A JSON string containing the data about the transaction.
     """
+    bigchain = current_app.config['bigchain']
 
     val = {}
 
@@ -46,12 +57,12 @@ def create_transaction():
 
     if tx['transaction']['operation'] == 'CREATE':
         tx = util.transform_create(tx)
-        tx = util.sign_tx(tx, b.me_private)
+        tx = util.sign_tx(tx, bigchain.me_private)
 
     if not util.verify_signature(tx):
         val['error'] = 'Invalid transaction signature'
 
-    val = b.write_transaction(tx)
+    val = bigchain.write_transaction(tx)
 
     return flask.jsonify(**tx)
 

tests/conftest.py

@@ -7,13 +7,14 @@ Tasks:
 """
 
 import os
+import copy
 
 import pytest
 
 
 DB_NAME = 'bigchain_test_{}'.format(os.getpid())
 
-config = {
+CONFIG = {
     'database': {
         'name': DB_NAME
     },
@@ -36,7 +37,7 @@ def restore_config(request, node_config):
 
 @pytest.fixture(scope='module')
 def node_config():
-    return config
+    return copy.deepcopy(CONFIG)
 
 
 @pytest.fixture
@@ -50,7 +51,8 @@ def user_public_key():
 
 
 @pytest.fixture
-def b():
+def b(request, node_config):
+    restore_config(request, node_config)
     from bigchaindb import Bigchain
     return Bigchain()
 

tests/test_commands.py

@@ -87,7 +87,7 @@ def test_bigchain_run_start_assume_yes_create_default_config(monkeypatch, mock_p
         value['return'] = newconfig
 
     monkeypatch.setattr(config_utils, 'write_config', mock_write_config)
-    monkeypatch.setattr(config_utils, 'file_config', lambda x: config_utils.dict_config(value['return']))
+    monkeypatch.setattr(config_utils, 'file_config', lambda x: config_utils.dict_config(expected_config))
     monkeypatch.setattr('os.path.exists', lambda path: False)
 
     args = Namespace(config=None, yes=True)

tests/test_core.py

@@ -1,10 +1,8 @@
-import copy
 import pytest
 
 
 @pytest.fixture
-def config(request):
+def config(request, monkeypatch):
-    import bigchaindb
     config = {
         'database': {
             'host': 'host',
@@ -18,13 +16,10 @@ def config(request):
         'keyring': [],
         'CONFIGURED': True,
     }
-    bigchaindb.config.update(config)
 
-    def fin():
+    monkeypatch.setattr('bigchaindb.config', config)
-        bigchaindb.config = bigchaindb._config
+
-        bigchaindb._config = copy.deepcopy(bigchaindb._config)
+    return config
-    request.addfinalizer(fin)
-    return bigchaindb.config
 
 
 def test_bigchain_class_default_initialization(config):

tests/utils/test_config_utils.py

@@ -10,8 +10,8 @@ ORIGINAL_CONFIG = copy.deepcopy(bigchaindb._config)
 
 
 @pytest.fixture(scope='function', autouse=True)
-def clean_config():
+def clean_config(monkeypatch):
-    bigchaindb.config = copy.deepcopy(ORIGINAL_CONFIG)
+    monkeypatch.setattr('bigchaindb.config', copy.deepcopy(ORIGINAL_CONFIG))
 
 
 def test_bigchain_instance_is_initialized_when_conf_provided():

tests/web/conftest.py

@@ -4,7 +4,8 @@ from ..db import conftest
 
 @pytest.fixture(autouse=True)
 def restore_config(request, node_config):
-    conftest.restore_config(request, node_config)
+    from bigchaindb import config_utils
+    config_utils.dict_config(node_config)
 
 
 @pytest.fixture(scope='module', autouse=True)
@@ -21,9 +22,10 @@ def cleanup_tables(request, node_config):
 def app(request, node_config):
     # XXX: For whatever reason this fixture runs before `restore_config`,
     #      so we need to manually call it.
-    conftest.restore_config(request, node_config)
+    restore_config(request, node_config)
+
     from bigchaindb.web import server
-    app = server.create_app()
+    app = server.create_app(debug=True)
     return app
 
 

tests/web/test_basic_views.py

@@ -12,7 +12,6 @@ TX_ENDPOINT = '/api/v1/transactions/'
 def test_get_transaction_endpoint(b, client, user_public_key):
     input_tx = b.get_owned_ids(user_public_key).pop()
     tx = b.get_transaction(input_tx)
-
     res = client.get(TX_ENDPOINT + input_tx)
     assert tx == res.json