Add validation

src/data/array_types.js

@@ -1166,8 +1166,8 @@ export {
     StructArrayLayout4f16,
     StructArrayLayout2i4 as PosArray,
     StructArrayLayout4i8 as RasterBoundsArray,
-    StructArrayLayout2i4 as CircleLayoutArray,
     StructArrayLayout4i8 as TileBoundsArray,
+    StructArrayLayout2i4 as CircleLayoutArray,
     StructArrayLayout2i4 as FillLayoutArray,
     StructArrayLayout4i8 as FillExtrusionLayoutArray,
     StructArrayLayout2i4 as HeatmapLayoutArray,

src/style-spec/validate/validate.js

@@ -22,6 +22,7 @@ import validateFog from './validate_fog.js';
 import validateString from './validate_string.js';
 import validateFormatted from './validate_formatted.js';
 import validateImage from './validate_image.js';
+import validateProjection from './validate_projection.js';
 
 const VALIDATORS = {
     '*'() {
@@ -43,7 +44,8 @@ const VALIDATORS = {
     'fog': validateFog,
     'string': validateString,
     'formatted': validateFormatted,
-    'resolvedImage': validateImage
+    'resolvedImage': validateImage,
+    'projection': validateProjection
 };
 
 // Main recursive validation function. Tracks:

src/style-spec/validate/validate_projection.js

@@ -0,0 +1,30 @@
+import ValidationError from '../error/validation_error.js';
+import getType from '../util/get_type.js';
+import validate from './validate.js';
+
+export default function validateImage(options) {
+    const projection = options.value;
+    const styleSpec = options.styleSpec;
+    const projectionSpec = styleSpec.projection;
+    const style = options.style;
+
+    let errors = [];
+
+    const rootType = getType(projection);
+
+    if (rootType === 'object') {
+        for (const key in projection) {
+            errors = errors.concat(validate({
+                key,
+                value: projection[key],
+                valueSpec: projectionSpec[key],
+                style,
+                styleSpec
+            }));
+        }
+    } else if (rootType !== 'string') {
+        errors = errors.concat([new ValidationError('projection', projection, `object or string expected, ${rootType} found`)]);
+    }
+
+    return errors;
+}