Merge branch 'master' into method-match

src/Expectation.php

@@ -221,15 +221,16 @@ final class Expectation
     }
 
     /**
-     * It skips the tests in the callback if the condition is not truthy.
+     * Apply the callback if the given "condition" is truthy.
      *
-     * @param Closure|bool|string $condition
+     * @param  (callable(): bool)|bool $condition
+     * @param callable(Expectation<TValue>): mixed $callback
      */
     public function when($condition, callable $callback): Expectation
     {
         $condition = is_callable($condition)
             ? $condition
-            : function () use ($condition) {
+            : static function () use ($condition): mixed {
                 return $condition;
             };
 

src/PendingObjects/TestCall.php

@@ -78,6 +78,26 @@ final class TestCall
         return $this;
     }
 
+    /**
+     * Asserts that the test throws the given `$exceptionClass` when called if the given condition is true.
+     *
+     * @param (callable(): bool)|bool $condition
+     */
+    public function throwsIf($condition, string $exception, string $exceptionMessage = null): TestCall
+    {
+        $condition = is_callable($condition)
+            ? $condition
+            : static function () use ($condition): mixed {
+                return $condition;
+            };
+
+        if ($condition()) {
+            return $this->throws($exception, $exceptionMessage);
+        }
+
+        return $this;
+    }
+
     /**
      * Runs the current test multiple times with
      * each item of the given `iterable`.