From 64130dfb2f124f56657a2835435983964a82663f Mon Sep 17 00:00:00 2001
From: Mike Dilger <mike@mikedilger.com>
Date: Thu, 1 Jan 2015 10:41:15 +1300
Subject: [PATCH] tests for ApproxEq ULPs

---
 tests/assert.rs | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/tests/assert.rs b/tests/assert.rs
index 3b181aa6..9348a0f1 100644
--- a/tests/assert.rs
+++ b/tests/assert.rs
@@ -33,3 +33,36 @@ fn assert_approx_eq_eps_f32() {
 fn assert_approx_eq_eps_f64_fail() {
     assert_approx_eq_eps!(1.0f64, 1.1, 0.05);
 }
+
+#[test]
+fn assert_approx_eq_ulps_f32() {
+    let x = 1000000_f32;
+    let y = 1000000.1_f32;
+    assert!(x != y);
+    assert_approx_eq_ulps!(x, y, 3);
+}
+
+#[test]
+#[should_fail]
+fn assert_approx_eq_ulps_f32_fail() {
+    let x = 1000000_f32;
+    let y = 1000000.1_f32;
+    assert_approx_eq_ulps!(x, y, 2);
+}
+
+#[test]
+fn assert_approx_eq_ulps_f64() {
+    let x = 1000000_f64;
+    let y = 1000000.0000000003_f64;
+    assert!(x != y);
+    assert_approx_eq_ulps!(x, y, 4);
+}
+
+#[test]
+#[should_fail]
+fn assert_approx_eq_ulps_f64_fail() {
+    let x = 1000000_f64;
+    let y = 1000000.0000000003_f64;
+    assert!(x != y);
+    assert_approx_eq_ulps!(x, y, 3);
+}