1 files changed, 23 insertions, 0 deletions
diff --git a/test/style/expression/util.test.cpp b/test/style/expression/util.test.cpp
new file mode 100644
index 0000000000..0337cd871f
--- /dev/null
+++ b/test/style/expression/util.test.cpp
@@ -0,0 +1,23 @@
+#include <mbgl/test/util.hpp>
+#include <mbgl/style/expression/util.hpp>
+
+using namespace mbgl;
+using namespace mbgl::style::expression;
+
+TEST(Expression, Util_rgba) {
+    Result<Color> valid = rgba(0, 0, 0, 0);
+    ASSERT_TRUE(valid);
+    ASSERT_EQ(valid->r, 0);
+    ASSERT_EQ(valid->g, 0);
+    ASSERT_EQ(valid->b, 0);
+    ASSERT_EQ(valid->a, 0);
+
+    ASSERT_FALSE(rgba(0, 0, 0, -0.1));
+    ASSERT_FALSE(rgba(0, 0, 0, 1.1));
+    ASSERT_FALSE(rgba(0, 0, -1, 1));
+    ASSERT_FALSE(rgba(0, 0, 256, 1));
+    ASSERT_FALSE(rgba(0, -1, 0, 1));
+    ASSERT_FALSE(rgba(0, 256, 0, 1));
+    ASSERT_FALSE(rgba(-1, 1, 0, 1));
+    ASSERT_FALSE(rgba(-256, 1, 0, 1));
+}