From 11f929de00f565652dbf246db1fad9b00dd5bb76 Mon Sep 17 00:00:00 2001
From: ryanhamley <ryan.hamley@mapbox.com>
Date: Mon, 18 Jun 2018 14:59:42 -0700
Subject: [PATCH] Throw ValidationError if required sprite property is not
 present

---
 src/style-spec/validate/validate_property.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/style-spec/validate/validate_property.js b/src/style-spec/validate/validate_property.js
index 1c3d5c2e414..593c77873e8 100644
--- a/src/style-spec/validate/validate_property.js
+++ b/src/style-spec/validate/validate_property.js
@@ -13,6 +13,7 @@ export default function validateProperty(options, propertyType) {
     const value = options.value;
     const propertyKey = options.objectKey;
     const layerSpec = styleSpec[`${propertyType}_${options.layerType}`];
+    const propsThatRequireSprite = ['background-pattern', 'fill-pattern', 'fill-extrusion-pattern', 'line-pattern', 'icon-image'];
 
     if (!layerSpec) return [];
 
@@ -51,6 +52,12 @@ export default function validateProperty(options, propertyType) {
         }
     }
 
+    if (options.layerType === 'background' || options.layerType === 'fill' || options.layerType === 'fill-extrusion' || options.layerType === 'line' || options.layerType === 'symbol') {
+        if (propsThatRequireSprite.indexOf(propertyKey) > -1 && style && !style.sprite) {
+            errors.push(new ValidationError(key, value, `use of "${propertyKey}" requires a style "sprite" property`));
+        }
+    }
+
     return errors.concat(validate({
         key: options.key,
         value,