1 files changed, 34 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/cmp_nan.rs b/src/tools/clippy/tests/ui/cmp_nan.rs
new file mode 100644
index 000000000..64ca52b01
--- /dev/null
+++ b/src/tools/clippy/tests/ui/cmp_nan.rs
@@ -0,0 +1,34 @@
+const NAN_F32: f32 = f32::NAN;
+const NAN_F64: f64 = f64::NAN;
+
+#[warn(clippy::cmp_nan)]
+#[allow(clippy::float_cmp, clippy::no_effect, clippy::unnecessary_operation)]
+fn main() {
+    let x = 5f32;
+    x == f32::NAN;
+    x != f32::NAN;
+    x < f32::NAN;
+    x > f32::NAN;
+    x <= f32::NAN;
+    x >= f32::NAN;
+    x == NAN_F32;
+    x != NAN_F32;
+    x < NAN_F32;
+    x > NAN_F32;
+    x <= NAN_F32;
+    x >= NAN_F32;
+
+    let y = 0f64;
+    y == f64::NAN;
+    y != f64::NAN;
+    y < f64::NAN;
+    y > f64::NAN;
+    y <= f64::NAN;
+    y >= f64::NAN;
+    y == NAN_F64;
+    y != NAN_F64;
+    y < NAN_F64;
+    y > NAN_F64;
+    y <= NAN_F64;
+    y >= NAN_F64;
+}