added basic tests

.circleci/test-server.sh

@@ -356,4 +356,36 @@ if [ "$RUN_WEBHOOK_TESTS" == "true" ] ; then
 
 fi
 
+# horizontal scale test
+
+echo -e "\n<########## TEST GRAPHQL-ENGINE WITH HORIZONTAL SCALING ########>\n"
+
+HASURA_HS_TEST_DB='postgres://gql_test:@localhost:5432/hs_hge_test'
+echo "Installing psql"
+apt-get update && apt-get install -y postgresql-client
+psql "$HASURA_GRAPHQL_DATABASE_URL" -c "create database hs_hge_test;"
+
+# start 1st server
+"$GRAPHQL_ENGINE" --database-url "$HASURA_HS_TEST_DB" serve >> "$OUTPUT_FOLDER/graphql-engine.log" 2>&1 & PID=$!
+wait_for_port 8080
+
+# start 2nd server
+"$GRAPHQL_ENGINE" --database-url "$HASURA_HS_TEST_DB" serve \
+                  --server-port 8081 --server-host 0.0.0.0 \
+                  >> "$OUTPUT_FOLDER/hs-graphql-engine.log" 2>&1 & HS_PID=$!
+wait_for_port 8081
+
+# run test
+pytest -vv --hge-url="$HGE_URL" --pg-url="$HASURA_GRAPHQL_DATABASE_URL" --test-hge-scale-url="http://localhost:8081" test_horizontal_scale.py
+
+kill -INT $PID
+kill -INT $HS_PID
+psql "$HASURA_GRAPHQL_DATABASE_URL" -c "drop database hs_hge_test;"
+sleep 4
+combine_hpc_reports
+unset HASURA_HS_TEST_DB
+
+
+# end horizontal scale test
+
 mv graphql-engine-combined.tix "$OUTPUT_FOLDER/graphql-engine.tix" || true

server/tests-py/conftest.py

@@ -50,6 +50,13 @@ def pytest_addoption(parser):
         help="Run Test cases with GraphQL queries being disabled"
     )
 
+    parser.addoption(
+        "--test-hge-scale-url",
+        metavar="<url>",
+        required=False,
+        help="Run testcases for horizontal scaling"
+    )
+
 
 @pytest.fixture(scope='session')
 def hge_ctx(request):
@@ -63,6 +70,7 @@ def hge_ctx(request):
     hge_jwt_conf = request.config.getoption('--hge-jwt-conf')
     ws_read_cookie = request.config.getoption('--test-ws-init-cookie')
     metadata_disabled = request.config.getoption('--test-metadata-disabled')
+    hge_scale_url = request.config.getoption('--test-hge-scale-url')
     try:
         hge_ctx = HGECtx(
             hge_url=hge_url,
@@ -73,7 +81,8 @@ def hge_ctx(request):
             hge_jwt_key_file=hge_jwt_key_file,
             hge_jwt_conf=hge_jwt_conf,
             ws_read_cookie=ws_read_cookie,
-            metadata_disabled=metadata_disabled
+            metadata_disabled=metadata_disabled,
+            hge_scale_url=hge_scale_url
         )
     except HGECtxError as e:
         pytest.exit(str(e))

server/tests-py/context.py

@@ -75,7 +75,7 @@ def server_bind(self):
 
 class HGECtx:
     def __init__(self, hge_url, pg_url, hge_key, hge_webhook, webhook_insecure,
-                 hge_jwt_key_file, hge_jwt_conf, metadata_disabled, ws_read_cookie):
+                 hge_jwt_key_file, hge_jwt_conf, metadata_disabled, ws_read_cookie, hge_scale_url):
         server_address = ('0.0.0.0', 5592)
 
         self.resp_queue = queue.Queue(maxsize=1)
@@ -118,6 +118,8 @@ def __init__(self, hge_url, pg_url, hge_key, hge_webhook, webhook_insecure,
 
         self.ws_read_cookie = ws_read_cookie
 
+        self.hge_scale_url = hge_scale_url
+
         result = subprocess.run(['../../scripts/get-version.sh'], shell=False, stdout=subprocess.PIPE, check=True)
         self.version = result.stdout.decode('utf-8').strip()
         if not self.metadata_disabled:

server/tests-py/queries/horizontal_scale/basic/steps.yaml

@@ -0,0 +1,34 @@
+-
+  operation:
+    type: bulk
+    args:
+      - type: run_sql
+        args:
+          sql: |
+            create table test_t1(
+              c1 int,
+              c2 text,
+              PRIMARY KEY (c1)
+            );
+      - type: track_table
+        args:
+          schema: public
+          name: test_t1
+      - type: run_sql
+        args:
+          sql: |
+            insert into test_t1(c1, c2) VALUES(1, 'test');
+  validate:
+    response:
+      data:
+        test_t1:
+          - c1: 1
+            c2: test
+    query:
+      query: |
+        query {
+          test_t1 {
+            c1
+            c2
+          }
+        }

server/tests-py/test_horizontal_scale.py

@@ -0,0 +1,53 @@
+import pytest
+import yaml
+import time
+import jsondiff
+
+from validate import json_ordered
+
+
+if not pytest.config.getoption("--test-hge-scale-url"):
+    pytest.skip("--test-hge-scale-url flag is missing, skipping tests", allow_module_level=True)
+
+
+class TestHorizantalScaleBasic():
+
+    @pytest.fixture(autouse=True, scope='class')
+    def transact(self, hge_ctx):
+        self.teardown = {"type": "clear_metadata", "args": {}}
+        yield
+        # teardown
+        st_code, resp = hge_ctx.v1q(self.teardown)
+        assert st_code == 200, resp
+
+    def test_horizontal_scale_basic(self, hge_ctx):
+        with open(self.dir() + "/steps.yaml") as c:
+            conf = yaml.load(c)
+
+        assert isinstance(conf, list) == True, 'Not an list'
+        for _, step in enumerate(conf):
+            # execute operation on 1st server
+            st_code, resp = hge_ctx.v1q(step['operation'])
+            assert st_code == 200, resp
+
+            # wait for x sec
+            time.sleep(0.3)
+            # validate data on 2nd server
+            response = hge_ctx.http.post(
+                hge_ctx.hge_scale_url + "/v1alpha1/graphql",
+                json=step['validate']['query']
+            )
+            st_code = response.status_code
+            resp = response.json()
+            assert st_code == 200, resp
+
+            if 'response' in step['validate']:
+                assert json_ordered(resp) == json_ordered(step['validate']['response']), yaml.dump({
+                    'response': resp,
+                    'expected': step['validate']['response'],
+                    'diff': jsondiff.diff(step['validate']['response'], resp)
+                })
+
+    @classmethod
+    def dir(cls):
+        return 'queries/horizontal_scale/basic'