Set up GitHub Actions (#8)

* Set up GitHub Actions
* Make printer work on Windows
* Fix Windows paths
* Fixed message population on Windows
* Fix CS
* Update phpcs.xml
* Create .gitattributes

Author: mheap

.gitattributes

@@ -0,0 +1 @@
+* text eol=lf

.github/workflows/push.yml

@@ -0,0 +1,30 @@
+name: CI
+on: push
+jobs:
+  run:
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      fail-fast: false
+      matrix:
+        operating-system: [ubuntu-latest, windows-latest, macos-latest]
+        php-versions: ['7.3', '7.4']
+    name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v1
+      with:
+        php-version: ${{ matrix.php-versions }}
+        extensions: mbstring
+        coverage: xdebug
+
+    - name: Composer dependencies
+      run: composer install --no-ansi --no-interaction --no-scripts --no-suggest --no-progress --prefer-dist
+
+    - name: Run phpunit
+      run: ./vendor/bin/phpunit
+
+    - name: Run phpcs
+      run: ./vendor/bin/phpcs

phpcs.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 <ruleset name="PSR12">
  <description>PSR12</description>
- <file>./src</file>
+ <file>src</file>
  <rule ref="PSR12"/>
 </ruleset>

src/Printer.php

@@ -40,21 +40,24 @@ protected function printDefectTrace(TestFailure $defect): void
         $e = $defect->thrownException();
 
         $errorLines = array_filter(
-            explode(PHP_EOL, (string)$e),
+            explode("\n", (string)$e),
             function ($l) {
                 return $l;
             }
         );
 
-        list($path, $line) = explode(":", end($errorLines));
+        $error = end($errorLines);
+        $lineIndex = strrpos($error, ":");
+        $path = substr($error, 0, $lineIndex);
+        $line = substr($error, $lineIndex + 1);
 
         if (!$path) {
             list($path, $line) = $this->getReflectionFromTest(
                 $defect->getTestName()
             );
         }
 
-        $message = explode(PHP_EOL, $e->getMessage())[0];
+        $message = explode("\n", $e->getMessage())[0];
 
         $type = $this->getCurrentType();
         $file = "file={$this->relativePath($path)}";
@@ -73,7 +76,10 @@ protected function getCurrentType()
 
     protected function relativePath(string $path)
     {
-        return str_replace(getcwd() . '/', '', $path);
+        $relative = str_replace(getcwd() . DIRECTORY_SEPARATOR, '', $path);
+        // Translate \ in to / for Windows
+        $relative = str_replace('\\', '/', $relative);
+        return $relative;
     }
 
     protected function getReflectionFromTest(string $name)