Added test

Co-Authored-By: Amélie-Dzovinar <dzov@users.noreply.github.com>

phpunit.xml.dist

@@ -7,6 +7,7 @@
         <testsuite name="Mockery Test Suite">
             <directory suffix="Test.php">./tests</directory>
             <directory phpVersion="7.0.0" phpVersionOperator=">=">./tests/PHP70</directory>
+            <directory phpVersion="7.1.0" phpVersionOperator=">=">./tests/PHP71</directory>
             <directory phpVersion="7.2.0" phpVersionOperator=">=">./tests/PHP72</directory>
         </testsuite>
 
@@ -15,6 +16,7 @@
             <directory suffix="Test.php">./tests/PHP56</directory>
 
             <exclude>./tests/PHP70</exclude>
+            <exclude>./tests/PHP71</exclude>
             <exclude>./tests/PHP72</exclude>
         </testsuite>
     </testsuites>

tests/PHP71/Php71LanguageFeaturesTest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace test\Mockery;
+
+use Mockery\Adapter\Phpunit\MockeryTestCase;
+
+/**
+ * @requires PHP 7.1.0-dev
+ */
+class Php71LanguageFeaturesTest extends MockeryTestCase
+{
+    public function testMockingIterableReturnType()
+    {
+        $mock = mock("test\Mockery\ReturnTypeIterableTypeHint");
+
+        $mock->shouldReceive("returnIterable");
+        $this->assertSame([], $mock->returnIterable());
+    }
+}
+
+abstract class ReturnTypeIterableTypeHint
+{
+    public function returnIterable(): iterable
+    {
+    }
+}