Introduce Code-Climate to maintain coverage (oppia#7067)

.circleci/config.yml

@@ -2,6 +2,13 @@ var_for_docker_image: &docker_image circleci/python:2.7.14-jessie-browsers
 
 anchor_for_job_defaults: &job_defaults
   working_directory: /home/circleci/oppia
+  # Its okay to hardcode the CC_TEST_REPORTER_ID as the only risk in doing so is
+  # when someone uses this test coverage ID to post incorrect coverage data.
+  # This generally does not occur and if it happens, it would be replaced with
+  # data from subsequent coverage payloads. See this comment for more
+  # information: https://github.com/oppia/oppia/pull/7067#issuecomment-508822501
+  environment:
+    CC_TEST_REPORTER_ID: 561968e2f03d3bb4f1aed69dc94174c2e3b9dc82cf1f8ad31fc799f8c67afc6e
   docker:
     - image: *docker_image
 
@@ -11,6 +18,13 @@ anchor_for_installing_dependencies: &install_dependencies
     source scripts/setup.sh || exit 1
     source scripts/setup_gae.sh || exit 1
 
+anchor_for_installing_cc_test_reporter: &install_cc
+  name: Install codeclimate test reporter
+  command: |
+    curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
+    chmod +x ./cc-test-reporter
+    ./cc-test-reporter before-build
+
 anchor_for_restoring_cache: &restore_cache
   keys:
     - setup-files-cache-{{ checksum "date" }}
@@ -62,11 +76,18 @@ jobs:
           name: Run frontend tests
           command: |
             bash -x scripts/run_frontend_tests.sh --run-minified-tests=true
+      # TODO(lilithxxx): Uncomment the following lines once #6821 is resolved.
+      # - run:
+      #     <<: *install_cc
       - run:
           name: Generate frontend coverage report
           command: |
             sudo pip install codecov
             codecov --file ../karma_coverage_reports/coverage-final.json
+          # TODO(lilithxxx): Uncomment the following lines and delete the above
+          # codecov statements once #6821 is resolved.
+          # ./cc-test-reporter sum-coverage ../karma_coverage_reports/coverage-final.json
+          # ./cc-test-reporter upload-coverage ../karma_coverage_reports/coverage-final.json
           when: on_success
 
   backend_tests:
@@ -80,11 +101,16 @@ jobs:
           name: Run backend tests
           command: |
             bash scripts/run_backend_tests.sh --generate_coverage_report --exclude_load_tests
+      - run:
+          <<: *install_cc
       - run:
           name: Generate backend coverage report
           command: |
             sudo pip install codecov
             codecov
+            ./cc-test-reporter format-coverage -t coverage.py coverage.xml
+            ./cc-test-reporter sum-coverage coverage/codeclimate.json
+            ./cc-test-reporter upload-coverage
           when: on_success
 
 workflows:

.coveragerc

@@ -0,0 +1,6 @@
+# .coveragerc to control coverage.py
+[run]
+omit =
+    */oppia_tools/*
+    */third_party/*
+    */usr/*

.github/CODEOWNERS

@@ -78,6 +78,7 @@
 /.eslintignore @apb7
 /.eslintrc @apb7
 /.htmllintrc @apb7
+/.coveragerc @apb7
 /.gitattributes @apb7
 /.gitignore @apb7
 /.isort.cfg @apb7

.github/README.md

@@ -1,4 +1,4 @@
-# [Oppia](https://www.oppia.org) [![Build Status](https://api.travis-ci.org/oppia/oppia.svg?branch=develop)](https://travis-ci.org/oppia/oppia) [![Code Coverage](https://codecov.io/github/oppia/oppia/coverage.svg?branch=develop)](https://codecov.io/github/oppia/oppia/?branch=develop) [![Join the chat at https://gitter.im/oppia/oppia-chat](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/oppia/oppia-chat?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+# [Oppia](https://www.oppia.org) [![Build Status](https://api.travis-ci.org/oppia/oppia.svg?branch=develop)](https://travis-ci.org/oppia/oppia) [![Code Coverage](https://api.codeclimate.com/v1/badges/eaa9dfe89c760481079d/test_coverage)](https://codeclimate.com/github/oppia/oppia/test_coverage) [![Join the chat at https://gitter.im/oppia/oppia-chat](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/oppia/oppia-chat?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 Oppia is an online learning tool that enables anyone to easily create and share interactive activities (called 'explorations'). These activities simulate a one-on-one conversation with a tutor, making it possible for students to learn by doing while getting feedback.
 

.gitignore

@@ -15,6 +15,8 @@ core/templates/dev/head/dist/*
 core/tests/.browserstack.env
 node_modules/*
 .coverage*
+!.coveragerc
+coverage.xml
 .viminfo
 .vscode/*
 libpeerconnection.log

scripts/run_backend_tests.sh

@@ -99,6 +99,9 @@ for arg in "$@"; do
   if [ "$arg" == "--generate_coverage_report" ]; then
     $PYTHON_CMD $COVERAGE_HOME/coverage combine
     $PYTHON_CMD $COVERAGE_HOME/coverage report --omit="$TOOLS_DIR/*","$THIRD_PARTY_DIR/*","/usr/share/*" --show-missing
+
+    echo "Generating xml coverage report..."
+    $PYTHON_CMD $COVERAGE_HOME/coverage xml
   fi
 done