Add method to retrieve currently configured strategies (#172)

* Add method to retrieve currently configured strategies

Author: gsteel

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 - Support discovering PSR-17 factories of `guzzlehttp/psr7` package
 - Support discovering PSR-17 factories of `laminas/laminas-diactoros` pakcage
+- `ClassDiscovery::getStrategies()` to retrieve the list of current strategies.
 
 ## 1.7.4 - 2020-01-03
 

spec/ClassDiscoverySpec.php

@@ -68,6 +68,11 @@ function it_prepends_strategies() {
         $this->find('Foobar')->shouldReturn('Added');
     }
 
+    function it_retrieves_configured_strategies() {
+        $expect = [DiscoveryHelper::class];
+        $this->getStrategies()->shouldReturn($expect);
+    }
+
     function it_appends_strategies() {
         $candidate = ['class' => 'Added'];
         DiscoveryHelper::setClasses('Foobar', [$candidate]);

src/ClassDiscovery.php

@@ -124,6 +124,16 @@ public static function setStrategies(array $strategies)
         self::clearCache();
     }
 
+    /**
+     * Returns the currently configured discovery strategies as fully qualified class names.
+     *
+     * @return string[]
+     */
+    public static function getStrategies(): iterable
+    {
+        return self::$strategies;
+    }
+
     /**
      * Append a strategy at the end of the strategy queue.
      *