1 files changed, 82 insertions, 0 deletions
diff --git a/tests/ui/numbers-arithmetic/float-nan.rs b/tests/ui/numbers-arithmetic/float-nan.rs
new file mode 100644
index 00000000000..0cc6473e5c4
--- /dev/null
+++ b/tests/ui/numbers-arithmetic/float-nan.rs
@@ -0,0 +1,82 @@
+// run-pass
+
+pub fn main() {
+  let nan: f64 = f64::NAN;
+  assert!((nan).is_nan());
+
+  let inf: f64 = f64::INFINITY;
+  let neg_inf: f64 = -f64::INFINITY;
+  assert_eq!(-inf, neg_inf);
+
+  assert!( nan !=  nan);
+  assert!( nan != -nan);
+  assert!(-nan != -nan);
+  assert!(-nan !=  nan);
+
+  assert!( nan !=   1.);
+  assert!( nan !=   0.);
+  assert!( nan !=  inf);
+  assert!( nan != -inf);
+
+  assert!(  1. !=  nan);
+  assert!(  0. !=  nan);
+  assert!( inf !=  nan);
+  assert!(-inf !=  nan);
+
+  assert!(!( nan == nan));
+  assert!(!( nan == -nan));
+  assert!(!( nan == 1.));
+  assert!(!( nan == 0.));
+  assert!(!( nan == inf));
+  assert!(!( nan == -inf));
+  assert!(!(  1. == nan));
+  assert!(!(  0. == nan));
+  assert!(!( inf == nan));
+  assert!(!(-inf == nan));
+  assert!(!(-nan == nan));
+  assert!(!(-nan == -nan));
+
+  assert!(!( nan >  nan));
+  assert!(!( nan > -nan));
+  assert!(!( nan >   0.));
+  assert!(!( nan >  inf));
+  assert!(!( nan > -inf));
+  assert!(!(  0. >  nan));
+  assert!(!( inf >  nan));
+  assert!(!(-inf >  nan));
+  assert!(!(-nan >  nan));
+
+  assert!(!(nan <   0.));
+  assert!(!(nan <   1.));
+  assert!(!(nan <  -1.));
+  assert!(!(nan <  inf));
+  assert!(!(nan < -inf));
+  assert!(!(nan <  nan));
+  assert!(!(nan < -nan));
+
+  assert!(!(  0. < nan));
+  assert!(!(  1. < nan));
+  assert!(!( -1. < nan));
+  assert!(!( inf < nan));
+  assert!(!(-inf < nan));
+  assert!(!(-nan < nan));
+
+  assert!((nan + inf).is_nan());
+  assert!((nan + -inf).is_nan());
+  assert!((nan + 0.).is_nan());
+  assert!((nan + 1.).is_nan());
+  assert!((nan * 1.).is_nan());
+  assert!((nan / 1.).is_nan());
+  assert!((nan / 0.).is_nan());
+  assert!((0.0/0.0f64).is_nan());
+  assert!((-inf + inf).is_nan());
+  assert!((inf - inf).is_nan());
+
+  assert!(!(-1.0f64).is_nan());
+  assert!(!(0.0f64).is_nan());
+  assert!(!(0.1f64).is_nan());
+  assert!(!(1.0f64).is_nan());
+  assert!(!(inf).is_nan());
+  assert!(!(-inf).is_nan());
+  assert!(!(1./-inf).is_nan());
+}