Enhancement: Run tests using GitHub actions

.docker/lint-xml-configuration/Dockerfile

@@ -0,0 +1,5 @@
+FROM alpine:latest
+
+RUN apk add --no-cache \
+    bash \
+    libxml2-utils

.gitattributes

@@ -1,3 +1,4 @@
+/.docker export-ignore
 /build export-ignore
 /tools export-ignore
 /tools/* binary

.github/workflows/ci.yml

@@ -9,10 +9,71 @@ name: CI
 jobs:
   coding-guidelines:
     name: Coding Guidelines
+
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout
         uses: actions/checkout@master
 
       - name: Run friendsofphp/php-cs-fixer
-        run: php7.3 tools/php-cs-fixer fix --diff-format=udiff --dry-run --show-progress=dots --using-cache=no --verbose
+        run: php7.3 ./tools/php-cs-fixer fix --diff-format=udiff --dry-run --show-progress=dots --using-cache=no --verbose
+
+  lint-xml-configuration:
+    name: Lint XML Configuration
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+
+      - name: Build Docker image
+        uses: ./.docker/lint-xml-configuration
+
+      - name: Lint XML configuration files
+        uses: ./.docker/lint-xml-configuration
+        with:
+          args: bash ./build/lint-xml-configuration
+
+  tests:
+    name: Tests
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-binary:
+          - php7.1
+          - php7.2
+          - php7.3
+
+        dependencies:
+          - lowest
+          - highest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+
+      - name: Install lowest dependencies with composer
+        if: matrix.dependencies == 'lowest'
+        run: ${{ matrix.php-binary }} ./tools/composer update --no-ansi --no-interaction --no-progress --no-suggest --prefer-lowest
+
+      - name: Install highest dependencies with composer
+        if: matrix.dependencies == 'highest'
+        run: ${{ matrix.php-binary }} ./tools/composer update --no-ansi --no-interaction --no-progress --no-suggest
+
+      - name: Run sanity check
+        run: PHP_BINARY=${{ matrix.php-binary }} bash ./build/sanity-check
+
+      - name: Run tests with phpunit
+        run: ${{ matrix.php-binary }} -d assert.exception=1 -d zend.assertions=1 ./phpunit --coverage-clover=coverage.xml
+
+      - name: Download code coverage uploader for Codecov.io
+        run: curl -s https://codecov.io/bash -o codecov
+
+      - name: Send code coverage report to Codecov.io
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+        run: bash codecov -Z

README.md

@@ -4,7 +4,7 @@ PHPUnit is a programmer-oriented testing framework for PHP. It is an instance of
 
 [![Latest Stable Version](https://img.shields.io/packagist/v/phpunit/phpunit.svg?style=flat-square)](https://packagist.org/packages/phpunit/phpunit)
 [![Minimum PHP Version](https://img.shields.io/badge/php-%3E%3D%207.1-8892BF.svg?style=flat-square)](https://php.net/)
-[![Build Status](https://img.shields.io/travis/sebastianbergmann/phpunit/7.5.svg?style=flat-square)](https://phpunit.de/build-status.html)
+[![CI Status](https://github.com/sebastianbergmann/phpunit/workflows/CI/badge.svg)](https://github.com/sebastianbergmann/phpunit/actions)
 
 ## Installation
 

build/lint-xml-configuration

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+xmllint --noout --schema phpunit.xsd phpunit.xml
+xmllint --noout --schema phpunit.xsd tests/_files/configuration.xml
+xmllint --noout --schema phpunit.xsd tests/_files/configuration_empty.xml
+xmllint --noout --schema phpunit.xsd tests/_files/configuration_xinclude.xml -xinclude

build/sanity-check

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+PHP_BINARY=${PHP_BINARY:-php}
+
+${PHP_BINARY} -d assert.exception=On -d zend.assertions=1 ./phpunit --configuration ./build/github-ci-fail.xml
+
+if [ $? -eq 0 ]; then
+  echo "This test should have failed.";
+  false;
+else
+  echo "This test has failed as expected.";
+fi