Update tests

.gitignore

@@ -1,5 +1,6 @@
 /.idea
 /.test
+/build
 /vendor
 composer.lock
 .DS_Store

.travis.yml

@@ -0,0 +1,16 @@
+language: php
+
+php:
+  - 7.0
+  - 7.1
+
+before_script:
+  - travis_retry composer self-update
+  - travis_retry composer install --prefer-source --no-interaction --dev
+
+script:
+  - mkdir -p build/logs
+  - vendor/bin/phpunit tests --coverage-clover build/logs/clover.xml
+
+after_success:
+  - php vendor/bin/coveralls -v

composer.json

@@ -25,7 +25,8 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^6|^7",
-        "mockery/mockery": "^1.1"
+        "mockery/mockery": "^1.1",
+        "satooshi/php-coveralls": "1.0.*"
     },
     "autoload": {
         "psr-4": {

phpunit.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/6.5/phpunit.xsd"
+         bootstrap="./vendor/autoload.php"
+         forceCoversAnnotation="false"
+         beStrictAboutCoversAnnotation="true"
+         beStrictAboutOutputDuringTests="true"
+         beStrictAboutTodoAnnotatedTests="true"
+         verbose="true"
+>
+    <testsuite name="default">
+        <directory suffix="Test.php">tests</directory>
+    </testsuite>
+
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="false">
+            <directory suffix=".php">src</directory>
+        </whitelist>
+    </filter>
+
+    <logging>
+        <log type="coverage-clover" target="build/logs/clover.xml"/>
+    </logging>
+</phpunit>