add phpunit

Author: ashnazg

.gitignore

@@ -5,3 +5,5 @@
 composer.lock
 composer.phar
 vendor
+# phpunit
+build

composer.json

@@ -31,5 +31,8 @@
         "issues": "http://pear.php.net/bugs/search.php?cmd=display&package_name[]=Console_Getopt",
         "source": "https://github.com/pear/Console_Getopt"
     },
-    "type": "library"
+    "type": "library",
+    "require": {
+        "phpunit/phpunit": "<=8"
+    }
 }

phpunit.xml.dist

@@ -0,0 +1,29 @@
+<phpunit bootstrap="vendor/autoload.php"
+         cacheTokens="false"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         stopOnError="false"
+         stopOnFailure="false"
+         stopOnIncomplete="false"
+         stopOnSkipped="false">
+
+    <testsuites>
+        <testsuite name="Test Suite">
+            <directory suffix=".phpt">tests/</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory suffix=".php">Console/</directory>
+        </whitelist>
+    </filter>
+
+    <logging>
+        <log type="coverage-clover" target="build/logs/clover.xml"/>
+        <log type="coverage-html" target="build/coverage/"/>
+    </logging>
+
+</phpunit>