[core] Functions must have at least one stop

This is already enforced by the style validator in mapbox-gl-style-spec. Enforce it here too.

2 files changed, 1 insertions, 6 deletions

diff --git a/test/fixtures/style_parser/stop-zoom-value.info.json b/test/fixtures/style_parser/stop-zoom-value.info.json
index 386dce9d29..39d7c68495 100644
--- a/test/fixtures/style_parser/stop-zoom-value.info.json
+++ b/test/fixtures/style_parser/stop-zoom-value.info.json
@@ -1,6 +1,7 @@
 {
     "default": {
         "log": [
+            [1, "WARNING", "ParseStyle", "function must have at least one stop"],
             [1, "WARNING", "ParseStyle", "function stop must have two elements"]
         ]
     }
diff --git a/test/style/functions.test.cpp b/test/style/functions.test.cpp
index 8ca2f951e7..c50787814b 100644
--- a/test/style/functions.test.cpp
+++ b/test/style/functions.test.cpp
@@ -50,12 +50,6 @@ TEST(Function, Stops) {
     EXPECT_EQ(3.0, evaluate(slope_2, 15));
     EXPECT_EQ(3.0, evaluate(slope_2, 22));
 
-    // Test no values.
-    Function<float> slope_3({}, 1.75);
-    EXPECT_EQ(1, evaluate(slope_3, 2));
-    EXPECT_EQ(1, evaluate(slope_3, 6));
-    EXPECT_EQ(1, evaluate(slope_3, 12));
-
 
     // Explicit constant slope in fringe regions.
     Function<float> slope_4({ { 0, 2 }, { 8, 10 } }, 1);