[TEST] Assert on individual components

1 files changed, 9 insertions, 0 deletions

diff --git a/platform/darwin/test/MGLBackgroundStyleLayerTests.mm b/platform/darwin/test/MGLBackgroundStyleLayerTests.mm
index e7c2982413..58ff42cd9d 100644
--- a/platform/darwin/test/MGLBackgroundStyleLayerTests.mm
+++ b/platform/darwin/test/MGLBackgroundStyleLayerTests.mm
@@ -36,6 +36,15 @@
         NSExpression *constantExpression = [NSExpression expressionWithFormat:@"%@", [MGLColor redColor]];
         layer.backgroundColor = constantExpression;
         mbgl::style::PropertyValue<mbgl::Color> propertyValue = { { 1, 0, 0, 1 } };
+        auto constantValue = rawLayer->getBackgroundColor();
+        XCTAssertEqual(constantValue.asConstant().r, propertyValue.asConstant().r,
+                       @"Setting backgroundColor to a constant value expression should update background-color (red).");
+        XCTAssertEqual(constantValue.asConstant().g, propertyValue.asConstant().g,
+                       @"Setting backgroundColor to a constant value expression should update background-color (green).");
+        XCTAssertEqual(constantValue.asConstant().b, propertyValue.asConstant().b,
+                       @"Setting backgroundColor to a constant value expression should update background-color (blue).");
+        XCTAssertEqual(constantValue.asConstant().a, propertyValue.asConstant().a,
+                       @"Setting backgroundColor to a constant value expression should update background-color (alpha).");
         XCTAssertEqual(rawLayer->getBackgroundColor(), propertyValue,
                        @"Setting backgroundColor to a constant value expression should update background-color.");
         XCTAssertEqualObjects(layer.backgroundColor, constantExpression,