add badge

Author: dimitrskpl

.github/workflows/run_tests.yml

@@ -1,6 +1,6 @@
 name: Execute all tests
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   run-tests:
@@ -9,7 +9,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v1
+      - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
 
@@ -20,3 +20,15 @@ jobs:
 
       - name: Run unit tests
         run: python -m pytest tests -m "not slow"
+      
+      - name: Run unit tests with coverage
+        run: |
+          coverage run --source=effector -m pytest tests -m "not slow"
+          coverage report -m
+          coverage xml
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          files: ./coverage.xml
+          fail_ci_if_error: true

README.md

@@ -6,6 +6,7 @@
 
 [![PyPI version](https://badge.fury.io/py/effector.svg?icon=si%3Apython)](https://badge.fury.io/py/effector)
 ![Execute Tests](https://github.com/givasile/effector/actions/workflows/run_tests.yml/badge.svg)
+[![codecov](https://codecov.io/gh/givasile/effector/branch/main/graph/badge.svg)](https://codecov.io/gh/givasile/effector)
 ![Publish Documentation](https://github.com/givasile/effector/actions/workflows/publish_documentation.yml/badge.svg)
 [![PyPI Downloads](https://static.pepy.tech/badge/effector)](https://pepy.tech/projects/effector)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/ambv/black)