1 files changed, 33 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/min_max.rs b/src/tools/clippy/tests/ui/min_max.rs
new file mode 100644
index 00000000000..8307d4b3019
--- /dev/null
+++ b/src/tools/clippy/tests/ui/min_max.rs
@@ -0,0 +1,33 @@
+#![warn(clippy::all)]
+
+use std::cmp::max as my_max;
+use std::cmp::min as my_min;
+use std::cmp::{max, min};
+
+const LARGE: usize = 3;
+
+fn main() {
+    let x;
+    x = 2usize;
+    min(1, max(3, x));
+    min(max(3, x), 1);
+    max(min(x, 1), 3);
+    max(3, min(x, 1));
+
+    my_max(3, my_min(x, 1));
+
+    min(3, max(1, x)); // ok, could be 1, 2 or 3 depending on x
+
+    min(1, max(LARGE, x)); // no error, we don't lookup consts here
+
+    let y = 2isize;
+    min(max(y, -1), 3);
+
+    let s;
+    s = "Hello";
+
+    min("Apple", max("Zoo", s));
+    max(min(s, "Apple"), "Zoo");
+
+    max("Apple", min(s, "Zoo")); // ok
+}