Add test for minimal install request

src/ExpressiveInstaller/OptionalPackages.php

@@ -464,7 +464,7 @@ public static function removeLineFromString($entry, $content)
      *
      * @return bool
      */
-    private static function requestMinimal(IOInterface $io)
+    public static function requestMinimal(IOInterface $io)
     {
         $query = [
             sprintf(

test/ExpressiveInstallerTest/RequestMinimalTest.php

@@ -0,0 +1,34 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @see       https://github.com/zendframework/zend-expressive-skeleton for the canonical source repository
+ * @copyright Copyright (c) 2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   https://github.com/zendframework/zend-expressive-skeleton/blob/master/LICENSE.md New BSD License
+ */
+
+namespace ExpressiveInstallerTest;
+
+use ExpressiveInstaller\OptionalPackages;
+use Prophecy\Argument;
+
+class RequestMinimalTest extends InstallerTestCase
+{
+    public function testRequestMinimalInstallIsTrue()
+    {
+        $io = $this->prophesize('Composer\IO\IOInterface');
+        $io->ask(Argument::any(), Argument::any())->willReturn('y');
+
+        $answer = OptionalPackages::requestMinimal($io->reveal());
+        $this->assertTrue($answer);
+    }
+
+    public function testRequestMinimalInstallIsFalse()
+    {
+        $io = $this->prophesize('Composer\IO\IOInterface');
+        $io->ask(Argument::any(), Argument::any())->willReturn('n');
+
+        $answer = OptionalPackages::requestMinimal($io->reveal());
+        $this->assertFalse($answer);
+    }
+}