Problem: No tests for GET /api/v1/validators

Solution: Add tests for the same

tests/web/test_info.py

@@ -18,6 +18,7 @@ def test_api_root_endpoint(client, wsserver_base_url):
                 'streams': '{}/api/v1/streams/valid_transactions'.format(
                     wsserver_base_url),
                 'metadata': '/api/v1/metadata/',
+                'validators': '/api/v1/validators',
             }
         },
         'docs': 'https://docs.bigchaindb.com/projects/server/en/vtsttst/',

tests/web/test_validators.py

@@ -0,0 +1,47 @@
+import pytest
+
+pytestmark = pytest.mark.tendermint
+
+VALIDATORS_ENDPOINT = '/api/v1/validators/'
+
+
+def test_get_validators_endpoint(b, client, monkeypatch):
+
+    def mock_get(uri):
+        return MockResponse()
+    monkeypatch.setattr('requests.get', mock_get)
+
+    res = client.get(VALIDATORS_ENDPOINT)
+
+    assert is_validator(res.json[0])
+    assert res.status_code == 200
+
+
+def test_get_validators_500_endpoint(b, client, monkeypatch):
+
+    def mock_get(uri):
+        return 'InvalidResponse'
+    monkeypatch.setattr('requests.get', mock_get)
+
+    res = client.get(VALIDATORS_ENDPOINT)
+    assert res.status_code == 500
+
+
+# Helper
+def is_validator(v):
+    return ('pub_key' in v) and ('voting_power' in v)
+
+
+class MockResponse():
+
+    def json(self):
+        return {'id': '',
+                'jsonrpc': '2.0',
+                'result':
+                {'block_height': 5,
+                 'validators': [
+                     {'accum': 0,
+                      'address': 'F5426F0980E36E03044F74DD414248D29ABCBDB2',
+                      'pub_key': {'data': '4E2685D9016126864733225BE00F005515200727FBAB1312FC78C8B76831255A',
+                                  'type': 'ed25519'},
+                      'voting_power': 10}]}}