From 726ad9cedc24f7f8a5e58b99cfd170e9be61387b Mon Sep 17 00:00:00 2001
From: Sylvain Bellemare <sylvain@ascribe.io>
Date: Thu, 14 Jul 2016 15:54:19 +0200
Subject: [PATCH 1/4] Fix #449

---
 tests/{utils => }/test_config_utils.py | 0
 tests/utils/__init__.py                | 0
 2 files changed, 0 insertions(+), 0 deletions(-)
 rename tests/{utils => }/test_config_utils.py (100%)
 delete mode 100644 tests/utils/__init__.py

diff --git a/tests/utils/test_config_utils.py b/tests/test_config_utils.py
similarity index 100%
rename from tests/utils/test_config_utils.py
rename to tests/test_config_utils.py
diff --git a/tests/utils/__init__.py b/tests/utils/__init__.py
deleted file mode 100644
index e69de29b..00000000

From b08f6ebffdc2c79e1926dd1e7584274975bacd6b Mon Sep 17 00:00:00 2001
From: Sylvain Bellemare <sylvain@ascribe.io>
Date: Thu, 14 Jul 2016 19:08:55 +0200
Subject: [PATCH 2/4] Add test for config_utils.file_config()

---
 tests/test_config_utils.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tests/test_config_utils.py b/tests/test_config_utils.py
index 8c8e22d4..3fd042e1 100644
--- a/tests/test_config_utils.py
+++ b/tests/test_config_utils.py
@@ -1,4 +1,5 @@
 import copy
+from unittest.mock import mock_open, patch
 
 import pytest
 
@@ -9,6 +10,12 @@ from bigchaindb import exceptions
 ORIGINAL_CONFIG = copy.deepcopy(bigchaindb._config)
 
 
+@pytest.fixture
+def ignore_local_config_file(monkeypatch):
+    from bigchaindb.config_utils import file_config
+    monkeypatch.setattr('bigchaindb.config_utils.file_config', file_config)
+
+
 @pytest.fixture(scope='function', autouse=True)
 def clean_config(monkeypatch):
     monkeypatch.setattr('bigchaindb.config', copy.deepcopy(ORIGINAL_CONFIG))
@@ -205,3 +212,11 @@ def test_update_config(monkeypatch):
     assert bigchaindb.config['database']['host'] == 'test-host'
     assert bigchaindb.config['database']['name'] == 'bigchaindb_other'
     assert bigchaindb.config['database']['port'] == 28016
+
+
+def test_file_config():
+    from bigchaindb.config_utils import file_config, CONFIG_DEFAULT_PATH
+    with patch('builtins.open', mock_open(read_data='{}')) as m:
+        config = file_config()
+    m.assert_called_once_with(CONFIG_DEFAULT_PATH)
+    assert config == {}

From 15b9e8d7e872de1d44d920ec9765e1d6c3ec3cd1 Mon Sep 17 00:00:00 2001
From: Sylvain Bellemare <sylvain@ascribe.io>
Date: Thu, 14 Jul 2016 19:27:58 +0200
Subject: [PATCH 3/4] Test config_utils.write_config()

---
 tests/test_config_utils.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/test_config_utils.py b/tests/test_config_utils.py
index 3fd042e1..eb4eb5e5 100644
--- a/tests/test_config_utils.py
+++ b/tests/test_config_utils.py
@@ -220,3 +220,13 @@ def test_file_config():
         config = file_config()
     m.assert_called_once_with(CONFIG_DEFAULT_PATH)
     assert config == {}
+
+
+def test_write_config():
+    from bigchaindb.config_utils import write_config, CONFIG_DEFAULT_PATH
+    m = mock_open()
+    with patch('builtins.open', m):
+        write_config({})
+    m.assert_called_once_with(CONFIG_DEFAULT_PATH, 'w')
+    handle = m()
+    handle.write.assert_called_once_with('{}')

From 96cc40dcffc90540c9e421255301771b1edf0661 Mon Sep 17 00:00:00 2001
From: Sylvain Bellemare <sylvain@ascribe.io>
Date: Wed, 20 Jul 2016 12:07:04 +0200
Subject: [PATCH 4/4] Add docstring that explains the fixture's purpose

---
 tests/test_config_utils.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/test_config_utils.py b/tests/test_config_utils.py
index eb4eb5e5..ea58f61a 100644
--- a/tests/test_config_utils.py
+++ b/tests/test_config_utils.py
@@ -12,6 +12,13 @@ ORIGINAL_CONFIG = copy.deepcopy(bigchaindb._config)
 
 @pytest.fixture
 def ignore_local_config_file(monkeypatch):
+    """
+    This fixture's purpose is to override the one under
+    :module:`tests/conftest.py` so that the original behaviour of
+    :func:`bigchaindb.config_utils.file_config` is restored, so that it can be
+    tested.
+
+    """
     from bigchaindb.config_utils import file_config
     monkeypatch.setattr('bigchaindb.config_utils.file_config', file_config)