Restore the deprecated method

Author: dmytro-ch

dev/tests/functional/tests/app/Magento/Checkout/Test/Block/Onepage/Shipping/Method.php

@@ -98,6 +98,16 @@ public function isShippingMethodAvailable(array $method)
         return $this->_rootElement->find($selector, Locator::SELECTOR_XPATH)->isVisible();
     }
 
+    /**
+     * @deprecated
+     * @param array $method
+     * @return bool
+     */
+    public function isShippingMethodAvaiable(array $method)
+    {
+        return $this->isShippingMethodAvailable($method);
+    }
+
     /**
      * Click continue button.
      *

dev/tests/functional/tests/app/Magento/Shipping/Test/Constraint/AssertCityBasedShippingRateChanged.php

@@ -30,10 +30,10 @@ public function processAssert(CheckoutOnepage $checkoutOnepage, $shippingMethod,
                 'Shipping rate has not been changed.'
             );
         }
-        $shippingAvailability = $isShippingAvailable ? 'avaiable' : 'unavailable';
+        $shippingAvailability = $isShippingAvailable ? 'available' : 'unavailable';
         \PHPUnit_Framework_Assert::assertEquals(
             $isShippingAvailable,
-            $checkoutOnepage->getShippingMethodBlock()->isShippingMethodAvaiable($shippingMethod),
+            $checkoutOnepage->getShippingMethodBlock()->isShippingMethodAvailable($shippingMethod),
             "Shipping rates for {$shippingMethod['shipping_service']} should be $shippingAvailability."
         );
     }