Add code coverage

.coveralls.yml

@@ -0,0 +1,3 @@
+coverage_clover: tests/Logs/clover.xml
+json_path: tests/Logs/coveralls-upload.json
+service_name: travis-ci

.travis.yml

@@ -6,4 +6,8 @@ php:
   - '7.1'
   - 'hhvm'
 install:
-  - composer update
+  - composer update
+script:
+ - ./vendor/bin/phpunit --coverage-clover ./tests/Logs/clover.xml
+after_script:
+ - php vendor/bin/php-coveralls -v

README.md

@@ -1,5 +1,6 @@
 # PSR-6 adapter for RW File Cache
 
 [![Build Status](https://travis-ci.org/rapidwebltd/RW-File-Cache-PSR-6.svg?branch=master)](https://travis-ci.org/rapidwebltd/RW-File-Cache-PSR-6)
+[![Coverage Status](https://coveralls.io/repos/github/rapidwebltd/RW-File-Cache-PSR-6/badge.svg?branch=master)](https://coveralls.io/github/rapidwebltd/RW-File-Cache-PSR-6?branch=master)
 
 This package provides a [PSR-6](http://www.php-fig.org/psr/psr-6/) adapter for [RW File Cache](https://github.com/rapidwebltd/RW-File-Cache). 

composer.json

@@ -15,7 +15,8 @@
     },
     "require-dev": {
         "cache/integration-tests": "^0.16.0",
-        "phpunit/phpunit": "^5.7"
+        "phpunit/phpunit": "^5.7",
+        "satooshi/php-coveralls": "^2.0"
     },
     "autoload": {
         "psr-4": {

phpunit.xml

@@ -17,7 +17,12 @@
         </testsuite>
     </testsuites>
     <filter>
-
+        <whitelist>
+            <directory suffix=".php">src</directory>
+            <exclude>
+                <directory suffix=".php">src/Examples</directory>
+            </exclude>
+        </whitelist>
     </filter>
     <php>