Add phpunit config

Author: swissspidy

phpunit.xml.dist

@@ -0,0 +1,26 @@
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+		 xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/4.8/phpunit.xsd"
+		 bootstrap="vendor/autoload.php"
+		 backupGlobals="false"
+		 beStrictAboutCoversAnnotation="true"
+		 beStrictAboutOutputDuringTests="true"
+		 beStrictAboutTestsThatDoNotTestAnything="true"
+		 beStrictAboutTodoAnnotatedTests="true"
+		 convertErrorsToExceptions="true"
+		 convertWarningsToExceptions="true"
+		 convertNoticesToExceptions="true"
+		 convertDeprecationsToExceptions="true"
+		 colors="true"
+		 verbose="true">
+	<testsuites>
+		<testsuite name="wp-cli/dist-archive-command tests">
+			<directory suffix="Test.php">tests</directory>
+		</testsuite>
+	</testsuites>
+
+	<coverage processUncoveredFiles="false">
+		<include>
+			<directory suffix=".php">src</directory>
+		</include>
+	</coverage>
+</phpunit>

tests/Distignore_Filter_Iterator_Test.php

@@ -0,0 +1,6 @@
+<?php
+
+use WP_CLI\Tests\TestCase;
+
+class Distignore_Filter_Iterator_Test extends TestCase {
+}