1 files changed, 13 insertions, 0 deletions

diff --git a/tests/ui/lint/rfc-2457-non-ascii-idents/lint-uncommon-codepoints.rs b/tests/ui/lint/rfc-2457-non-ascii-idents/lint-uncommon-codepoints.rs
new file mode 100644
index 000000000..ed8e7dddd
--- /dev/null
+++ b/tests/ui/lint/rfc-2457-non-ascii-idents/lint-uncommon-codepoints.rs
@@ -0,0 +1,13 @@
+#![deny(uncommon_codepoints)]
+
+const µ: f64 = 0.000001; //~ ERROR identifier contains uncommon Unicode codepoints
+//~| WARNING should have an upper case name
+
+fn dijkstra() {} //~ ERROR identifier contains uncommon Unicode codepoints
+
+fn main() {
+    let ㇻㇲㇳ = "rust"; //~ ERROR identifier contains uncommon Unicode codepoints
+
+    // using the same identifier the second time won't trigger the lint.
+    println!("{}", ㇻㇲㇳ);
+}