修正单元测试

.travis.yml

@@ -16,4 +16,7 @@ before_script:
   - composer self-update
   - composer install --prefer-source --no-interaction --dev
 
-script: phpunit
+script: phpunit --coverage-clover=coverage.xml --configuration=phpunit.xml
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,5 +1,13 @@
 # The ThinkPHP5 Image Package
 
+[![Build Status](https://img.shields.io/travis/top-think/think-image.svg)](https://travis-ci.org/top-think/think-image)
+[![Coverage Status](https://img.shields.io/codecov/c/github/top-think/think-image.svg)](https://codecov.io/github/top-think/think-image)
+[![Downloads](https://img.shields.io/github/downloads/top-think/think-image/total.svg)](https://github.com/top-think/think-image/releases)
+[![Releases](https://img.shields.io/github/release/top-think/think-image.svg)](https://github.com/top-think/think-image/releases/latest)
+[![Releases Downloads](https://img.shields.io/github/downloads/top-think/think-image/latest/total.svg)](https://github.com/top-think/think-image/releases/latest)
+[![Packagist Status](https://img.shields.io/packagist/v/top-think/think-image.svg)](https://packagist.org/packages/topthink/think-image)
+[![Packagist Downloads](https://img.shields.io/packagist/dt/top-think/think-image.svg)](https://packagist.org/packages/topthink/think-image)
+
 ## 安装
 
 > composer require topthink/think-image

composer.json

@@ -13,7 +13,7 @@
     },
     "require-dev": {
         "topthink/framework": "dev-master",
-        "phpunit/phpunit": "^5.4"
+        "phpunit/phpunit": "3.*"
     },
     "autoload": {
         "psr-4": {