Add KeyValidatorTrait::validateKeys

src/KeyValidatorTrait.php

@@ -8,7 +8,7 @@
 trait KeyValidatorTrait
 {
     /**
-     * Verifies the the given cache key is a legal value.
+     * Verifies the given cache key is a legal value.
      *
      * @param mixed $key The cache key to validate.
      *
@@ -26,4 +26,18 @@ protected function validateKey($key)
             throw new InvalidArgumentException("Key '{$key}' contains unsupported characters");
         }
     }
+
+    /**
+     * Verifies all of the given cache keys are a legal values.
+     *
+     * @param array $keys The collection cache key to validate.
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException Thrown if the $key string is not a legal value.
+     */
+    protected function validateKeys(array $keys)
+    {
+        array_walk($keys, [$this, 'validateKey']);
+    }
 }

tests/KeyValidatorTraitTest.php

@@ -38,6 +38,32 @@ public function validateKeyWithInvalidValue($key)
         $this->validateKey($key);
     }
 
+    /**
+     * @test
+     * @covers ::validateKeys
+     *
+     * @return void
+     */
+    public function validateKeysWithString()
+    {
+        $this->assertNull($this->validateKeys(['a valid string', 'another valid string']));
+    }
+
+    /**
+     * @param mixed $key The key value which will throw an execption.
+     *
+     * @test
+     * @covers ::validateKeys
+     * @expectedException \Psr\SimpleCache\InvalidArgumentException
+     * @dataProvider provideInvalidKeys
+     *
+     * @return void
+     */
+    public function validateKeysWithInvalidValue($key)
+    {
+        $this->validateKeys(['valid_key', $key, 'another_valid_key']);
+    }
+
     /**
      * Provides valid keys for testing.
      *