[ios, macos] Added MGLFillExtrusionStyleLayer example

Added a code example to MGLFillExtrusionStyleLayer to unbreak the darwin-style-code make target.

2 files changed, 22 insertions, 0 deletions

diff --git a/platform/darwin/src/MGLFillExtrusionStyleLayer.h b/platform/darwin/src/MGLFillExtrusionStyleLayer.h
index 732c9a3b84..53a69d57dd 100644
--- a/platform/darwin/src/MGLFillExtrusionStyleLayer.h
+++ b/platform/darwin/src/MGLFillExtrusionStyleLayer.h
@@ -42,6 +42,12 @@ typedef NS_ENUM(NSUInteger, MGLFillExtrusionTranslationAnchor) {
  ### Example
 
  ```swift
+ let layer = MGLFillExtrusionStyleLayer(identifier: "buildings", source: buildings)
+ layer.sourceLayerIdentifier = "building"
+ layer.fillExtrusionHeight = MGLStyleValue(interpolationMode: .identity, sourceStops: nil, attributeName: "height", options: nil)
+ layer.fillExtrusionBase = MGLStyleValue(interpolationMode: .identity, sourceStops: nil, attributeName: "min_height", options: nil)
+ layer.predicate = NSPredicate(format: "extrude == TRUE")
+ mapView.style?.addLayer(layer)
  ```
  */
 MGL_EXPORT
diff --git a/platform/darwin/test/MGLDocumentationExampleTests.swift b/platform/darwin/test/MGLDocumentationExampleTests.swift
index 177d97d523..6d2dc597a9 100644
--- a/platform/darwin/test/MGLDocumentationExampleTests.swift
+++ b/platform/darwin/test/MGLDocumentationExampleTests.swift
@@ -158,6 +158,22 @@ class MGLDocumentationExampleTests: XCTestCase, MGLMapViewDelegate {
 
         XCTAssertNotNil(mapView.style?.layer(withIdentifier: "parks"))
     }
+    
+    func testMGLFillExtrusionStyleLayer() {
+        let buildings = MGLVectorSource(identifier: "buildings", configurationURL: URL(string: "https://example.com/style.json")!)
+        mapView.style?.addSource(buildings)
+        
+        //#-example-code
+        let layer = MGLFillExtrusionStyleLayer(identifier: "buildings", source: buildings)
+        layer.sourceLayerIdentifier = "building"
+        layer.fillExtrusionHeight = MGLStyleValue(interpolationMode: .identity, sourceStops: nil, attributeName: "height", options: nil)
+        layer.fillExtrusionBase = MGLStyleValue(interpolationMode: .identity, sourceStops: nil, attributeName: "min_height", options: nil)
+        layer.predicate = NSPredicate(format: "extrude == TRUE")
+        mapView.style?.addLayer(layer)
+        //#-end-example-code
+        
+        XCTAssertNotNil(mapView.style?.layer(withIdentifier: "buildings"))
+    }
 
     func testMGLSymbolStyleLayer() {
         let pois = MGLVectorSource(identifier: "pois", configurationURL: URL(string: "https://example.com/style.json")!)