From 847b06e5584f1fe0f4031ec334d0d9a586bc4c3a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mert=20A=C5=9Fan?= <mertemreasan@gmail.com>
Date: Thu, 23 Sep 2021 03:35:41 +0300
Subject: [PATCH] add `when()` method

---
 src/Expectation.php | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/Expectation.php b/src/Expectation.php
index 253b1e1e..7a1e6057 100644
--- a/src/Expectation.php
+++ b/src/Expectation.php
@@ -177,6 +177,26 @@ final class Expectation
         return $this;
     }
 
+    /**
+     * It skips the tests in the callback if the condition is not truthy.
+     *
+     * @param Closure|bool|string $condition
+     */
+    public function when($condition, callable $callback): Expectation
+    {
+        $condition = is_callable($condition)
+            ? $condition
+            : function () use ($condition) {
+                return $condition;
+            };
+
+        if ($condition()) {
+            $callback(new self($this->value));
+        }
+
+        return $this;
+    }
+
     /**
      * Asserts that two variables have the same type and
      * value. Used on objects, it asserts that two