Enhancement: Assert that no warning is issued when using exact version constraint for unstable package

tests/Composer/Test/Package/Loader/ValidatingArrayLoaderTest.php

@@ -326,6 +326,18 @@ class ValidatingArrayLoaderTest extends \PHPUnit_Framework_TestCase
                 ),
                 false,
             ),
+            array(
+                array(
+                    'name' => 'foo/bar',
+                    'require' => array(
+                        'bar/unstable' => '0.3.0',
+                    ),
+                ),
+                array(
+                    // using an exact version constraint for an unstable version should not trigger a warning
+                ),
+                false,
+            ),
             array(
                 array(
                     'name' => 'foo/bar',