Run on Paas

tests/app/test_config.py

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+import os
+import importlib
+from unittest import mock
+
+import pytest
+
+from app import config
+
+
+def cf_conf():
+    os.environ['API_HOST_NAME'] = 'cf'
+
+
+@pytest.fixture
+def reload_config():
+    """
+    Reset config, by simply re-running config.py from a fresh environment
+    """
+    old_env = os.environ.copy()
+
+    yield
+
+    os.environ = old_env
+    importlib.reload(config)
+
+
+def test_load_cloudfoundry_config_if_available(monkeypatch, reload_config):
+    os.environ['API_HOST_NAME'] = 'env'
+    monkeypatch.setenv('VCAP_SERVICES', 'some json blob')
+
+    with mock.patch('app.cloudfoundry_config.extract_cloudfoundry_config', side_effect=cf_conf) as cf_config:
+        # reload config so that its module level code (ie: all of it) is re-instantiated
+        importlib.reload(config)
+
+    assert cf_config.called
+
+    assert os.environ['API_HOST_NAME'] == 'cf'
+    assert config.Config.API_HOST_NAME == 'cf'
+
+
+def test_load_config_if_cloudfoundry_not_available(monkeypatch, reload_config):
+    os.environ['API_HOST_NAME'] = 'env'
+
+    monkeypatch.delenv('VCAP_SERVICES', raising=False)
+
+    with mock.patch('app.cloudfoundry_config.extract_cloudfoundry_config') as cf_config:
+        # reload config so that its module level code (ie: all of it) is re-instantiated
+        importlib.reload(config)
+
+    assert not cf_config.called
+
+    assert os.environ['API_HOST_NAME'] == 'env'
+    assert config.Config.API_HOST_NAME == 'env'
+
+
+def test_cloudfoundry_config_has_different_defaults():
+    # these should always be set on Sandbox
+    assert config.Sandbox.DEBUG is True