[ios] Add test for code snippet added to MGLPolyline doc change

2 files changed, 14 insertions, 3 deletions

diff --git a/platform/darwin/src/MGLPolyline.h b/platform/darwin/src/MGLPolyline.h
index 079a1c617d..e46baa91cc 100644
--- a/platform/darwin/src/MGLPolyline.h
+++ b/platform/darwin/src/MGLPolyline.h
@@ -43,9 +43,8 @@ NS_ASSUME_NONNULL_BEGIN
      CLLocationCoordinate2D(latitude: 35.68476, longitude: -220.24257),
      CLLocationCoordinate2D(latitude: 37.78428, longitude: -122.41310)
  ]
- 
- let polyline = MGLPolyline(coordinates: &coordinates, count: UInt(coordinates.count))
-```
+ let polyline = MGLPolyline(coordinates: coordinates, count: UInt(coordinates.count))
+ ```
 
  A polyline is known as a
  <a href="https://tools.ietf.org/html/rfc7946#section-3.1.4">LineString</a>
diff --git a/platform/darwin/test/MGLDocumentationExampleTests.swift b/platform/darwin/test/MGLDocumentationExampleTests.swift
index 48e6b17f44..3e949b0967 100644
--- a/platform/darwin/test/MGLDocumentationExampleTests.swift
+++ b/platform/darwin/test/MGLDocumentationExampleTests.swift
@@ -103,6 +103,18 @@ class MGLDocumentationExampleTests: XCTestCase, MGLMapViewDelegate {
 
         XCTAssertNotNil(mapView.style?.source(withIdentifier: "pois"))
     }
+    
+    func testMGLPolyline() {
+        //#-example-code
+        let coordinates = [
+            CLLocationCoordinate2D(latitude: 35.68476, longitude: -220.24257),
+            CLLocationCoordinate2D(latitude: 37.78428, longitude: -122.41310)
+        ]
+        let polyline = MGLPolyline(coordinates: coordinates, count: UInt(coordinates.count))
+        //#-end-example-code
+        
+        XCTAssertNotNil(polyline)
+    }
 
     func testMGLCircleStyleLayer() {
         let population = MGLVectorSource(identifier: "population", configurationURL: URL(string: "https://example.com/style.json")!)