1 files changed, 60 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Math/round/S15.8.2.15_A7.js b/js/src/tests/test262/built-ins/Math/round/S15.8.2.15_A7.js
new file mode 100644
index 0000000000..d7a3e6e63f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Math/round/S15.8.2.15_A7.js
@@ -0,0 +1,60 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+info: |
+    If x is less than or equal to -0 and x is greater than or equal to -0.5,
+    Math.round(x) is equal to -0
+es5id: 15.8.2.15_A7
+description: >
+    `Math.round(x)` differs from `Math.floor(x + 0.5)`:
+
+    1) for values in [-0.5; -0]
+    2) for 0.5 - Number.EPSILON / 4
+    3) for odd integers in [-(2 / Number.EPSILON - 1); -(1 / Number.EPSILON + 1)] or in [1 / Number.EPSILON + 1; 2 / Number.EPSILON - 1]
+---*/
+assert.sameValue(
+  1 / Math.round(-0.5),
+  1 / -0,
+  'The result of evaluating (1 / Math.round(-0.5)) is expected to be 1 / -0'
+);
+
+assert.sameValue(
+  1 / Math.round(-0.25),
+  1 / -0,
+  'The result of evaluating (1 / Math.round(-0.25)) is expected to be 1 / -0'
+);
+
+assert.sameValue(1 / Math.round(-0), 1 / -0, 'The result of evaluating (1 / Math.round(-0)) is expected to be 1 / -0');
+
+var x = 0;
+
+// CHECK#4
+x = 0.5 - Number.EPSILON / 4;
+assert.sameValue(1 / Math.round(x), 1 / 0, 'The result of evaluating (1 / Math.round(x)) is expected to be 1 / 0');
+
+// CHECK#5
+x = -(2 / Number.EPSILON - 1);
+assert.sameValue(Math.round(x), x, 'Math.round(-(2 / Number.EPSILON - 1)) returns x');
+
+// CHECK#6
+x = -(1.5 / Number.EPSILON - 1);
+assert.sameValue(Math.round(x), x, 'Math.round(-(1.5 / Number.EPSILON - 1)) returns x');
+
+// CHECK#7
+x = -(1 / Number.EPSILON + 1);
+assert.sameValue(Math.round(x), x, 'Math.round(-(1 / Number.EPSILON + 1)) returns x');
+
+// CHECK#8
+x = 1 / Number.EPSILON + 1;
+assert.sameValue(Math.round(x), x, 'Math.round(1 / Number.EPSILON + 1) returns x');
+
+// CHECK#9
+x = 1.5 / Number.EPSILON - 1;
+assert.sameValue(Math.round(x), x, 'Math.round(1.5 / Number.EPSILON - 1) returns x');
+
+// CHECK#10
+x = 2 / Number.EPSILON - 1;
+assert.sameValue(Math.round(x), x, 'Math.round(2 / Number.EPSILON - 1) returns x');
+
+reportCompare(0, 0);