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-rw-r--r--testing/web-platform/tests/css/css-values/round-function.html10
1 files changed, 10 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-values/round-function.html b/testing/web-platform/tests/css/css-values/round-function.html
index 29ec60ea44..338ecaed90 100644
--- a/testing/web-platform/tests/css/css-values/round-function.html
+++ b/testing/web-platform/tests/css/css-values/round-function.html
@@ -200,6 +200,16 @@ test_math_used("calc(0 - round(to-zero, 13, 10))", "-10", { type: "integer" });
test_math_used("calc(0 - round(to-zero, -13, 10))", "10", { type: "integer" });
test_math_used("calc(0 - round(to-zero, -18, 10))", "10", { type: "integer" });
+// Test omission of <step> argument
+test_math_used("round(1.5)", "2", { type: "integer" });
+test_math_used("round(up, 1.5)", "2", { type: "integer" });
+test_math_used("round(down, 1.5)", "1", { type: "integer" });
+test_math_used("round(to-zero, 1.5)", "1", { type: "integer" });
+test_math_used("round(-1.5)", "-1", { type: "integer" });
+test_math_used("round(up, -1.5)", "-1", { type: "integer" });
+test_math_used("round(down, -1.5)", "-2", { type: "integer" });
+test_math_used("round(to-zero, -1.5)", "-1", { type: "integer" });
+
// Extreme cases:
// 0 step is NaN