add phpunit config

phpunit.xml.dist

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false"
+         backupStaticAttributes="false"
+         colors="true"
+         convertDeprecationsToExceptions="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="false"
+         stopOnError="false"
+         stopOnFailure="false"
+>
+    <testsuites>
+        <testsuite name="Zhamao Framework Test Suite">
+            <directory suffix="Test.php">./tests</directory>
+        </testsuite>
+    </testsuites>
+    <php>
+        <env name="APP_ENV" value="testing"/>
+    </php>
+</phpunit>