[ios, macos] handle duplicate source error

1 files changed, 24 insertions, 0 deletions

diff --git a/platform/ios/test/MGLSourceTests.m b/platform/ios/test/MGLSourceTests.m
new file mode 100644
index 0000000000..90ec4e3a0b
--- /dev/null
+++ b/platform/ios/test/MGLSourceTests.m
@@ -0,0 +1,24 @@
+#import "MGLMapViewTests.h"
+
+@interface MGLSourceTests : MGLMapViewTests
+
+@end
+
+@implementation MGLSourceTests
+
+- (void)testDuplicateSources {
+    MGLVectorSource *source1 = [[MGLVectorSource alloc] initWithIdentifier:@"my-source" URL:[NSURL URLWithString:@"mapbox://mapbox.mapbox-terrain-v2"]];
+    MGLVectorSource *source2 = [[MGLVectorSource alloc] initWithIdentifier:@"my-source" URL:[NSURL URLWithString:@"mapbox://mapbox.mapbox-terrain-v2"]];
+    
+    [self.mapView.style addSource: source1];
+    
+    @try {
+        [self.mapView.style addSource: source2];
+        XCTFail(@"Should not have reached this point");
+    }
+    @catch (NSException *e) {
+        XCTAssertNotNil(e, @"Should have thrown an exception");
+    }
+}
+
+@end