System test (#34)

Author: liyanhui1228

.circleci/config.yml

@@ -8,12 +8,32 @@ jobs:
   build:
     docker:
       - image: googleapis/nox:0.17.0
+      - image: mysql:5.7
+        environment:
+          MYSQL_ROOT_HOST: "%"
+          MYSQL_ROOT_PASSWORD: 666666
+        ports:
+          - 3306:3306
+      - image: circleci/postgres:9.6
+        environment:
+          POSTGRES_PASSWORD: 666666
+        ports:
+          - 5432:5432
 
     working_directory: ~/repo
 
     steps:
       - checkout
-
+      - run:
+          name: Decrypt credentials
+          command: |
+            if [ -n "$GOOGLE_APPLICATION_CREDENTIALS" ]; then
+              openssl aes-256-cbc -d -a -k "$GOOGLE_CREDENTIALS_PASSPHRASE" \
+                  -in trace/tests/system/credentials.json.enc \
+                  -out trace/$GOOGLE_APPLICATION_CREDENTIALS
+            else
+              echo "No credentials. System tests will not run."
+            fi
       - run:
           name: Run tests - opencensus.trace
           command: |

trace/nox.py

@@ -15,6 +15,7 @@
 from __future__ import absolute_import
 
 import nox
+import os
 
 
 @nox.session
@@ -39,7 +40,37 @@ def unit_tests(session, python_version):
         '--cov-config=.coveragerc',
         '--cov-report=',
         '--cov-fail-under=97',
-        'tests/',
+        'tests/unit/',
+        *session.posargs
+    )
+
+
+@nox.session
+@nox.parametrize('python_version', ['2.7', '3.6'])
+def system_tests(session, python_version):
+    """Run the system test suite."""
+
+    # Sanity check: Only run system tests if the environment variable is set.
+    if not os.environ.get('GOOGLE_APPLICATION_CREDENTIALS', ''):
+        session.skip('Credentials must be set via environment variable.')
+
+    # Run the system tests against latest Python 2 and Python 3 only.
+    session.interpreter = 'python{}'.format(python_version)
+
+    # Set the virtualenv dirname.
+    session.virtualenv_dirname = 'sys-' + python_version
+
+    # Install all test dependencies, then install this package into the
+    # virutalenv's dist-packages.
+    session.install('-r', 'requirements-test.txt')
+    session.install('.')
+
+    # Run py.test against the system tests.
+    session.run(
+        'py.test',
+        '-vvv',
+        '-s',
+        'tests/system/',
         *session.posargs
     )
 

trace/requirements-test.txt

@@ -1,6 +1,6 @@
 Django==1.11.5
 Flask==0.12.2
-google-cloud-trace==0.15.4
+google-cloud-trace==0.15.5
 mock==2.0.0
 mysql-connector==2.1.6
 psycopg2==2.7.3.1

trace/tests/system/basic_trace/basic_trace_system_test.py

@@ -0,0 +1,73 @@
+# Copyright 2017, OpenCensus Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+
+
+def func_to_trace():
+    import time
+
+    print('Test simple tracing...')
+    time.sleep(2)
+
+
+class TestBasicTrace(unittest.TestCase):
+
+    def test_request_tracer(self):
+        import json
+
+        from opencensus.trace import request_tracer
+        from opencensus.trace.samplers import always_on
+        from opencensus.trace.exporters import file_exporter
+        from opencensus.trace.propagation import google_cloud_format
+
+        trace_id = 'f8739df974a4481f98748cd92b27177d'
+        span_id = '16971691944144156899'
+        trace_option = 1
+
+        trace_header = '{}/{};o={}'.format(trace_id, span_id, trace_option)
+
+        sampler = always_on.AlwaysOnSampler()
+        exporter = file_exporter.FileExporter()
+        propagator = google_cloud_format.GoogleCloudFormatPropagator()
+        span_context = propagator.from_header(header=trace_header)
+
+        tracer = request_tracer.RequestTracer(
+            span_context=span_context,
+            sampler=sampler,
+            exporter=exporter,
+            propagator=propagator
+        )
+
+        with tracer.span(name='root_span') as root:
+            func_to_trace()
+            parent_span_id = root.span_id
+            with root.span(name='child_span'):
+                func_to_trace()
+
+        tracer.finish()
+
+        file = open(file_exporter.DEFAULT_FILENAME, 'r')
+        trace_json = json.loads(file.read())
+
+        spans = trace_json.get('spans')
+
+        self.assertEqual(trace_json.get('traceId'), trace_id)
+        self.assertEqual(len(spans), 2)
+
+        for span in spans:
+            if span.get('name') == 'root_span':
+                self.assertEqual(str(span.get('parentSpanId')), span_id)
+            else:
+                self.assertEqual(span.get('parentSpanId'), parent_span_id)

trace/tests/system/credentials.json.enc

@@ -0,0 +1,49 @@
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…ce/tests/unit/ext/django/app/__init__.py trace/tests/system/django/app/__init__.pytrace/tests/unit/ext/django/app/__init__.py renamed to trace/tests/system/django/app/__init__.py trace/tests/unit/ext/django/app/__init__.py renamed to trace/tests/system/django/app/__init__.py

@@ -66,12 +66,20 @@
 ]
 
 OPENCENSUS_TRACE = {
-    'SAMPLER': 'opencensus.trace.samplers.fixed_rate.FixedRateSampler',
-    'EXPORTER': 'opencensus.trace.exporters.print_exporter.PrintExporter',
+    'SAMPLER': 'opencensus.trace.samplers.always_on.AlwaysOnSampler',
+    'EXPORTER': 'opencensus.trace.exporters.google_cloud_exporter.GoogleCloudExporter',
     'PROPAGATOR': 'opencensus.trace.propagation.google_cloud_format.'
                   'GoogleCloudFormatPropagator',
 }
 
+DEFAULT_DJANGO_TRACER_PARAMS = {
+    'SAMPLING_RATE': 0.5,
+    'GCP_REPORTER_PROJECT': os.environ.get('GCLOUD_PROJECT_PYTHON'),
+    'ZIPKIN_REPORTER_SERVICE_NAME': 'my_service',
+    'ZIPKIN_REPORTER_HOST_NAME': 'localhost',
+    'ZIPKIN_REPORTER_PORT': 9411,
+}
+
 OPENCENSUS_TRACE_PARAMS = {
     'SAMPLING_RATE': 0.5,
 }